5 Werkstofftechnik
Filtern
Dokumenttyp
- Vortrag (460)
- Posterpräsentation (116)
- Beitrag zu einem Tagungsband (71)
- Zeitschriftenartikel (67)
- Forschungsdatensatz (27)
- Buchkapitel (11)
- Dissertation (10)
- Forschungsbericht (7)
- Sonstiges (5)
- Sammelband (Herausgeberschaft für den kompletten Band) (3)
- Beitrag zu einem Sammelband (2)
- Monografie (1)
- Corrigendum (1)
- Preprint (1)
Sprache
- Englisch (617)
- Deutsch (159)
- Mehrsprachig (4)
- Französisch (2)
Referierte Publikation
- nein (782) (entfernen)
Schlagworte
- Additive Manufacturing (53)
- Corrosion (45)
- Additive manufacturing (40)
- Ontology (34)
- Glass (31)
- Microstructure (31)
- Creep (24)
- Fatigue (23)
- Transmission electron microscopy (18)
- Crack growth (16)
- LCF (16)
- CCS (15)
- Ontologie (15)
- 316L (14)
- Additive Fertigung (14)
- Ceramics (14)
- Degradation (14)
- EBSD (12)
- Sintering (12)
- Aluminium (11)
- Ceramic (11)
- Alloy 2618A (10)
- Coarsening (10)
- Fraktographie (10)
- Glas (10)
- Low Cycle Fatigue (10)
- Machine Learning (10)
- Particle size (10)
- Ti-6Al-4V (10)
- CCUS (9)
- CO2 (9)
- Crystallization (9)
- FAIR (9)
- Mikrostruktur (9)
- Nanoparticles (9)
- Oxidation (9)
- Simulation (9)
- Steel (9)
- VSSA (9)
- Crystal plasticity (8)
- DCB (8)
- Diffraction (8)
- Digitalisierung (8)
- Digitalization (8)
- EN AW-2618A (8)
- Fractography (8)
- Glass fiber reinforced polymers (8)
- High entropy alloys (8)
- Kriechen (8)
- Martensitic steel (8)
- Slurry (8)
- Thermoelectrics (8)
- Aluminium alloy (7)
- Anisotropy (7)
- Mechanical testing (7)
- Plattform MaterialDigital (7)
- Powder (7)
- S-phase (7)
- Scanning electron microscopy (7)
- Semantic Web Technologies (7)
- Vickers (7)
- Water speciation (7)
- Zugversuch (7)
- AGIL (6)
- AISI 316L (6)
- CALPHAD (6)
- Composite (6)
- Electron microscopy (6)
- Geothermal (6)
- High temperature corrosion (6)
- High-temperature corrosion (6)
- In situ (6)
- Nano powder (6)
- Nickel-base superalloys (6)
- Robotic melting (6)
- Schädigung (6)
- Semantic Interoperability (6)
- Soda-lime silicate glass (6)
- Sulfidation (6)
- Supercritical/dense phase CO2 (6)
- TMF (6)
- Thermomechanical fatigue (6)
- Wind turbine blades (6)
- 3D printing (5)
- Aging (5)
- Alterung (5)
- Betriebsfestigkeit (5)
- CCU (5)
- CO2 quality (5)
- Carbon steel (5)
- Carbon steels (5)
- Damage (5)
- Dark-field transmission electron microscopy (DFTEM) (5)
- Data Interoperability (5)
- Droplet corrosion (5)
- FAIR data (5)
- FAIR data management (5)
- Fe-Al alloys (5)
- Full Notch Creep Test (5)
- Heat treatment (5)
- Hydrogen (5)
- Impurities (5)
- Intermetallics (5)
- Iron aluminides (5)
- Keramik (5)
- Knowledge Representation (5)
- Knowledge graph and ontologies (5)
- Layerwise slurry deposition (5)
- Lebensdauer (5)
- Mechanical properties (5)
- Microgravity (5)
- Mikroplastik (5)
- Neutron diffraction (5)
- Non-destructive testing (5)
- Normung (5)
- PMD Core Ontology (5)
- Polymer matrix composites (5)
- Residual Stress (5)
- Residual stress (5)
- Sandwich (5)
- Schadensanalyse (5)
- Superaustenite steel (5)
- TEM (5)
- Tensile Test (5)
- Water content (5)
- Wissensrepräsentation (5)
- Workflow (5)
- X-ray diffraction (5)
- Alkali ions (4)
- Alkali zinc borate glasses (4)
- Alumina (4)
- Bildanalyse (4)
- Carbon capture (4)
- Composites (4)
- Computed Tomography (4)
- Creep behavior (4)
- Data Fusion (4)
- Data Space (4)
- Data mapping (4)
- Diesel (4)
- Environmental stress cracking (4)
- Ermüdung (4)
- Fatigue crack growth (4)
- Foaming (4)
- Fracture surface (4)
- Full-Notch Creep Test (FNCT) (4)
- Gassensorik (4)
- High Cycle Fatigue (4)
- High alloyed steel (4)
- High entropy alloy (4)
- High temperature (4)
- In-space manufacturing (4)
- Inconel 686 (4)
- LTCC (4)
- Laser Powder Bed Fusion (4)
- Laser powder bed fusion (4)
- NTE (4)
- Nano (4)
- Ni-Resist (4)
- Oxidglas (4)
- P92 (4)
- PE-HD (4)
- Pipeline (4)
- Pipeline network (4)
- Plattform Material Digital (4)
- Polyaniline (4)
- Polymer (4)
- Reference data (4)
- SEM (4)
- Scale-bridging (4)
- Scarf repairs (4)
- Selective laser melting (4)
- Shear modulus (4)
- Spectroscopy (4)
- Surface (4)
- TED-GC-MS (4)
- Tensile test (4)
- Tensile testing (4)
- Thermomechanics (4)
- Virtual experiments (4)
- Viscosity (4)
- Young's modulus (4)
- Zerstörungsfreie Prüfung (4)
- 3D (3)
- Ab-initio (3)
- Advanced ceramics (3)
- Aluminium Alloy (3)
- Binder Jetting (3)
- Brinell hardness (3)
- CFK (3)
- CLS (3)
- Carbon capture storage (3)
- Carbon dioxide (3)
- Ceramic spring (3)
- Chemically complex alloy (3)
- Coating (3)
- Concrete (3)
- Corrosion Fatigue (3)
- Crack (3)
- Crack Propagation (3)
- Crack tip opening displacement (3)
- Creep data (3)
- Creep-fatigue (3)
- Dark-field transmission electron microscopy (3)
- Dielectric strength (3)
- Diffusion (3)
- Digitaler Zwilling (3)
- Digtial Representation (3)
- Diopside (3)
- Elastic modulus (3)
- Electron Backscatter Diffraction (3)
- Electronic Lab Notebook (3)
- Environmental Stress Cracking (3)
- FIB (3)
- Ferritic-martensitic steels (3)
- Fracture Toughness (3)
- GD-OES (3)
- Gold nanoparticles (3)
- H2Safety@BAM (3)
- Hardness (3)
- High temperature mechanical properties (3)
- High-density polyethylene (3)
- High-entropy alloys (3)
- Infrarotspektroskopie (3)
- Interoperability (3)
- Inverted classroom (3)
- Iron oxide nanoparticles (3)
- Knowledge graph (3)
- Korrosion (3)
- Layerwise Slurry Deposition (3)
- Lightweight materials (3)
- Lithium Ion Batteries (3)
- Luftultraschall (3)
- ML (3)
- Mechanical behavior (3)
- Mechanische Eigenschaften (3)
- Metadata schema (3)
- Microplastics (3)
- Microstructure Design (3)
- Modeling (3)
- Nano-powder (3)
- Orientation (3)
- Oxide Glasses (3)
- PMD (3)
- PMDco (3)
- Pitting (3)
- Pulveraktivkohle (3)
- REM (3)
- Recommendations (3)
- Referenzdaten (3)
- Research Data Management (3)
- Rotor blade (3)
- Roughness (3)
- Röntgenrefraktion (3)
- Sample preparation (3)
- Scintillators (3)
- Semantic Data (3)
- Semantic Web (3)
- SiO2 (3)
- Silicate Glasses (3)
- Sol-gel (3)
- Solid-state (3)
- Stress relaxation (3)
- Superalloy (3)
- Superlegierung (3)
- Surface energy (3)
- Syngle Crystal alloy (3)
- TDEP (3)
- Temperature (3)
- Tempered Martensite Ferritic Steels (3)
- Tensile Test Ontology (3)
- Tensile data (3)
- Texture (3)
- Thermo-Mechanical Fatigue (3)
- Thermogravimetrie (3)
- Transmission electron microscopy (TEM) (3)
- Ultrasound (3)
- Utilization (3)
- Wasser (3)
- Welding (3)
- Whole-chain CCS scenario (3)
- Wind energy (3)
- Wind turbine blade shells (3)
- Windenergie (3)
- XRD (3)
- μ-gravity (3)
- 3D Druck (2)
- 3D-printing (2)
- AM (2)
- Additiv gefertigter Stahl (2)
- Adiabatic calorimeter (2)
- Agglomerates (2)
- Aggressive environment (2)
- Air-coupled ultrasonic testing (2)
- Airborne ultrasonic testing (2)
- Al-Cu-Li alloys (2)
- Aluminum (2)
- Aluminum alloys (2)
- Analysis (2)
- Analytische Zentrifuge (2)
- Annealing (2)
- Aquifer (2)
- Automation (2)
- Belebtschlamm (2)
- Biodiesel (2)
- Biofilm (2)
- Bond energy (2)
- CO2-storage (2)
- CT (2)
- Calcium cobaltite (2)
- Calciumcobaltit (2)
- Calciummanganat (2)
- Capture (2)
- Carbon (2)
- Carbon Fiber Reinforced Plastics (2)
- Carbon storage (2)
- Casting (2)
- CeO2 (2)
- Cement (2)
- Ceria (2)
- Characterization (2)
- Chromium oxide (2)
- Coatings (2)
- Compositionally complex alloys (2)
- Condensation (2)
- Copper (2)
- Copper alloys (2)
- Corrosion fatigue (2)
- Crack evolution (2)
- Crack propagation (2)
- Crack propagation analysis (2)
- Creep-Fatigue (2)
- Crevice corrosion (2)
- Cross linking (2)
- Crystal orientation (2)
- Cure process (2)
- DLS (2)
- Data Management (2)
- Data Structures (2)
- Data management (2)
- Dataset (2)
- Datenbank (2)
- Dehnungsfehler (2)
- Density (2)
- Depth-profiling (2)
- Destabilization (2)
- Deuterium (2)
- Dielectric breakdown (2)
- Diffraction Elastic Constants (2)
- Diffraction Enhanced Imaging (2)
- Diffusion coefficient (2)
- Digital image correlation (2)
- Digital material representation (2)
- Digital representation (2)
- Digitization (2)
- Dislocation (2)
- Dislocations (2)
- Dispersion process (2)
- Distribution function (2)
- Dynamic mechanical analysis (DMA) (2)
- EDX (2)
- EDXRD (2)
- Electron beam induced modification (2)
- Electron-beam-induced modification (2)
- Environmental Stress Cracking (ESC) (2)
- Environmental stress cracking (ESC) (2)
- Erneuerbare Energien (2)
- Extensometer (2)
- Fahrrad (2)
- Faser-Kunststoff-Verbunde (2)
- Faserkunststoffverbunde (2)
- Faseroptische Sensorik (2)
- Fatigue of sandwich shell structures (2)
- FeCr- alloys (2)
- Ferroelectret (2)
- Ferroelektret (2)
- Fiber reinforced polymer (2)
- Fluoride phosphate glasses (2)
- Fracture Surface Analysis (2)
- Fracture surface analysis (2)
- Fraktografie (2)
- GFK (2)
- Geführte Ultraschallwellen (2)
- Gender gap (2)
- Gitterkonstanten (2)
- Glass Digital (2)
- Glass composition (2)
- Glass powder (2)
- Glass-ceramics (2)
- Grain boundary engineering (2)
- HEA (2)
- HIP (2)
- Hard machining (2)
- Heat Treatment (2)
- High Alloyed Steel (2)
- High Entropy Alloy (2)
- High Temperature Corrosion (2)
- High Temperature Testing (2)
- High-entropy alloy (2)
- Hochentropie-Legierung (2)
- Hochtemperatur (2)
- Hydrogen permeation (2)
- IN 718 (2)
- IN718 (2)
- IR (2)
- ISRU (2)
- Imaging techniques (2)
- In situ tensile test (2)
- In-situ (2)
- Infrastructure (2)
- Injection (2)
- Interface (2)
- Internal friction (2)
- Joined nickel-based alloys (2)
- Kavitation (2)
- Keramikfeder (2)
- Kikuchi (2)
- Kleinprobenprüfung (2)
- Kontrastierung (2)
- L-PBF (2)
- LSD-print (2)
- Laminography (2)
- Laser (2)
- Laser Powder Bed fusion (2)
- Laser ablation in liquid (2)
- Laser beam melting (2)
- Laser cladding (2)
- Lattice misfit (2)
- Lattice parameters (2)
- Layerwise (2)
- Lead borate glasses (2)
- Leckdetektion (2)
- Long-term behavior (2)
- Low cycle fatigue (2)
- Lunar habitat (2)
- Lunar regolith simulant (2)
- MEA (2)
- Manganese oxide (2)
- Manufacturing (2)
- Material Digital (2)
- Material digital (2)
- Metal seal (2)
- Metrologie zur Wasserstoffspeicherung (2)
- Micromechanical model (2)
- Microstrucrue Design (2)
- Microstructural analysis (2)
- Microstructural characterization (2)
- Microstructure analysis (2)
- Microstructure evolution (2)
- Microstructure-property-correlation (2)
- Mikrostrukturentwicklung (2)
- Mixed gas atmosphere (2)
- Monte-Carlo Simulation (2)
- Multifunctional nanoparticles (2)
- Multilayer (2)
- Multilayer technology (2)
- Multilayertechnik (2)
- NDT (2)
- NFDI (2)
- Nano particle (2)
- Nano screening (2)
- Nanomaterial (2)
- Nanopulver (2)
- Notches (2)
- OECD TG 124 (2)
- Ontologien (2)
- Ontology development (2)
- Oriented surface crystallization (2)
- Oxidation behavior (2)
- PBF-LB/M/316L (2)
- Partikelgrößenverteilung (2)
- Paving (2)
- Phase change material (2)
- Phase-field simulation (2)
- Phasenidentifikation (2)
- Photon counting detector (2)
- Pipelines (2)
- Plasticity (2)
- Polyethylen (2)
- Polyethylen hoher Dichte (2)
- Polyethylene, PE-HD (2)
- Polymer Matrix Composites (2)
- Porosity (2)
- Precipitation (2)
- Probengrößeneffekt (2)
- Process monitoring (2)
- Protective coating (2)
- Präparation (2)
- Push-out Test (2)
- Ratio refinement (2)
- Reaction sintering (2)
- Reference material (2)
- Residual Stresses (2)
- Residual stresses (2)
- Ressidual stress (2)
- Rissentwicklung (2)
- Risswachstum (2)
- Roboter (2)
- Robotische Glasschmelzanlage (2)
- Robotische Schmelzanlage (2)
- Rotorblattschalen (2)
- Round robin (2)
- Röntgen-Refraktion (2)
- Röntgenbeugung (2)
- S355 steel sheet (2)
- SAXS (2)
- SIMS (2)
- SLM (2)
- Salt eutectics (2)
- Schadensprävention (2)
- Selective Laser Melting (2)
- Semantic Representation (2)
- Semantisches Web (2)
- SensRef (2)
- Sensorik (2)
- Sibayak (2)
- Silicon Carbide (2)
- Silver diffusion (2)
- Silver nanoparticle (2)
- Silver-glass-metallization-paste (2)
- Sinter additive (2)
- Sintering additives (2)
- Sintern (2)
- Size distribution (2)
- Sol-gel coating (2)
- Solar sintering (2)
- Solubility (2)
- Spannungs-Dehnungs-Verhalten (2)
- Spannungsriss (2)
- Spray drying (2)
- Spring constant (2)
- Standard (2)
- Standardisierung (2)
- Standardization (2)
- Starch (2)
- Starch nanoparticle (2)
- Storage (2)
- Structural Health Monitoring (SHM) (2)
- Struktur (2)
- Sulfiding (2)
- Supercritical CO2 (2)
- Surface Energy (2)
- Surface crystallization (2)
- Synchrotron Tomography (2)
- Synchrotronstrahlung (2)
- Synthetic air (2)
- Temperaturschwankungen (2)
- Tensile Properties (2)
- Thermal Spray (2)
- Thermal energy storage (2)
- Thermoanalyse (2)
- Thermoelectric (2)
- Thermographie (2)
- Thermogravimetry (2)
- Thermomechanik (2)
- Thermoset polymers (2)
- Ti64 (2)
- TiAl5V4 (2)
- Titan (2)
- Titanium (2)
- Titanium oxide (2)
- ToF-SIMS (2)
- Topografie (2)
- Topographie (2)
- Topography (2)
- Transmissionselektronenmikroskopie (2)
- Transparent ceramics (2)
- Tribologie (2)
- Two Photon Polymerization (2)
- UV-irradiation (2)
- Vickers hardness (2)
- Viscoplasticity (2)
- Wall thickness (2)
- Wandler (2)
- Weibull Distribution (2)
- Werkstoffprüfung (2)
- Wind turbine (2)
- Wood protection (2)
- X-Ray Diffraction (2)
- X-ray laminography (2)
- X-ray refraction (2)
- XANES (2)
- Zero-g (2)
- Zugeigenschaften (2)
- corrosion (2)
- robotische Glasschmelzanlage (2)
- µ-gravity (2)
- Öffentliche Sicherheit (2)
- 150 Years (1)
- 2PP (1)
- 3D REM (1)
- 3D Reconstruction (1)
- 3D glass structure model (1)
- 3D imaging (1)
- 3D materialography (1)
- 5G (1)
- 9-12% Cr ferritic-martensitic steels (1)
- 9–12%Cr steel (1)
- AFM (1)
- AFM based test methods (1)
- AISI 304L (1)
- ATZ (1)
- Abgasturbolader Heißteile (1)
- Abwasser (1)
- Accelerated integration scheme (1)
- Acid-leaching (1)
- Acids (1)
- Active thermography (1)
- Additive manufactured Ni-base superalloys (1)
- Adiabatic shear bands (1)
- Adolf Martens (1)
- Advanced manufacturing (1)
- Advanced wastewater treatment (1)
- Aerospace (1)
- Age hardening (1)
- Ageing (1)
- Aggressive environement (1)
- Aggressive gases (1)
- Aging mechanisms (1)
- Al-Li alloys (1)
- Al2CuMg (1)
- Al2O3 (1)
- Alkali zinc borate glass (1)
- Alkali-activated materials (1)
- Allgemeine Grundlagen (1)
- Alloy 2818A (1)
- Alpha-tricalcium phosphate (1)
- Alumina toughened zirconia (1)
- Aluminiumlegierung (1)
- Aluminosilicate glasses (1)
- Aluminum alloy (1)
- Amorphous silica (1)
- Analyse (1)
- Analytical services (1)
- Analytik (1)
- Anhydrite (1)
- Anticorrosion (1)
- Anwendungen (1)
- Artefact (1)
- Atacama Desert (1)
- Atmospheric Plasma Spraying (1)
- Atmospheric plasma spraying (1)
- Atomic packing factor (1)
- Atomization (1)
- Aufbau von Festkörpern (1)
- Aussonderugnsrate (1)
- Austenitic cast iron (1)
- Austenitic stainless steel (1)
- Austenitic steel (1)
- Austenitic steel 316L (1)
- Austenitischer Stahl (1)
- Automatable digital approach (1)
- Automated finite element analysis (1)
- Automatische Finite Element Simulation (1)
- BCS (1)
- BET (1)
- BTS (1)
- Beanspruchung (1)
- Berstdruck (1)
- Biaxial strength (1)
- Bilanzierung (1)
- Binder jetting (1)
- Bio Ceramics (1)
- Bio-ceramic engineering (1)
- Bioactive (1)
- Bioactive Glass (1)
- Bioactive glass (1)
- Bioceramic (1)
- Bioceramics (1)
- Bioresorbable (1)
- Blended learning (1)
- Blähen (1)
- Boden (1)
- Borate glasses (1)
- Breakdown strength (1)
- Brittle / ductile fracture behavior (1)
- Brittle fracture (1)
- Brown-rot fungi (1)
- Bruch (1)
- Bruchflächen (1)
- Bruchflächenanalyse (1)
- Bruchflächenauswertung (1)
- Bundesoberbehörden (1)
- Burst test (1)
- CALPHAD databases analysis (1)
- CMSX4 (1)
- CO2 Corrosion (1)
- CO2-Speicherung (1)
- CO2-corrosion (1)
- Cabon capture and storage (1)
- Calcination (1)
- Calcium manganate (1)
- Calcium sulfates (1)
- Calibration (1)
- Cantor alloy (1)
- Carbidic austempered ductile iron (1)
- Carbon steels (1)
- Carbon Capture (1)
- Carbon Capture, Utilization and Storage (CCUS) (1)
- Carbon Fibers (1)
- Carbon capture and storage (1)
- Carbon fibre-reinforced-plastics (1)
- Catalogue of services (1)
- Ccs (1)
- CdTe quantum dots (1)
- Centrifugal casting (1)
- Centrifugal compressor wheel (1)
- Ceramic multilayer (1)
- Ceramic nano particles (1)
- Ceramic springs (1)
- Ceramics 3D printing (1)
- Certification Standard 22 (1)
- Certified Referencematerial (1)
- Cetrifugal Liquid Sedimentation CLS (1)
- Charpy test (1)
- Chemically Complex Alloy (1)
- Chemically complex alloys (1)
- Chemische Analyse (1)
- Chemo-mechanical coupling (1)
- Chemometrie (1)
- Chromatography (1)
- Chromia (1)
- Co-axial monitoring (1)
- Co-firing (1)
- Co-segregation (1)
- Co2-Storage (1)
- Complex borides (1)
- Complex concentrated alloy (CCA) (1)
- Complex loading (1)
- Component assessment (1)
- Composite materials (1)
- Composite pressure vessels (1)
- Composite structures (1)
- Composite testing (1)
- Computed tomography (1)
- Concrete 3D-printing (1)
- Coniophora puteana (1)
- Contamination (1)
- Continnum damage model (1)
- Cooling simulations (1)
- Corrosion and storage (CCUS) technology (1)
- Corrosion mechanism (1)
- Corrosion resistance (1)
- Coulomb explosion (1)
- Covid-19 (1)
- Cow stress (1)
- Coûts de la corrosion (1)
- Cr2O3 (1)
- CrCoNi (1)
- CrMnFeCoNi (1)
- Crack healing (1)
- Creep anisotropy (1)
- Creep behaviour (1)
- Creep, Creep Rupture, and Stress Rupture (1)
- Critical energy release rate (1)
- Crop protection formulations (1)
- Crystal Defects (1)
- Crystal Orientation (1)
- Crystal Plasticity Modelling (1)
- Crystal lattice (1)
- Cubical Iron Oxide (1)
- Cubical shape (1)
- Cycle jump (1)
- Cyclic R-Curve (1)
- Cyclic loading (1)
- Cyclic oxidation (1)
- Cyclic softening (1)
- DED-L (1)
- DIN (1)
- Damage Behavior (1)
- Damage Tolerance (1)
- Damage behavior (1)
- Damage evolution (1)
- Damage mechanisms (1)
- Data Exchange (1)
- Data Integration (1)
- Data Mapping (1)
- Data analysis (1)
- Data format (1)
- Data fusion (1)
- Data linking (1)
- Data pipeline concept (1)
- Data space (1)
- Data storage (1)
- Data structure (1)
- Datenfusion (1)
- Datenmanagement (1)
- Datenökosystem (1)
- Deep learning (1)
- Defect detection (1)
- Defects (1)
- Defects phase diagram (1)
- Defects thermodynamics (1)
- Deformation behavior (1)
- Demonstrators (1)
- Dense phase (1)
- Density-based Model (1)
- Density-based Thermodynamics (1)
- Density-based model (1)
- Density-based phase-field modelling (1)
- Dental (1)
- Dental ceramics (1)
- Dentine (1)
- Design of experiment (1)
- Die casting (1)
- Dielectric Spectroscopy (1)
- Dielectric breakdown strength (1)
- Dielectric characterization (1)
- Dielectric properties (1)
- Diffraction contrast (1)
- Diffusivity (1)
- Digital Transformation (1)
- Digital Twin (1)
- Digital workflow (1)
- Discrete element method (1)
- Dislocation substructure (1)
- Disordered assemblies (1)
- Dissimilar metal weld (1)
- Dissolved water (1)
- Distributed fiber optic sensors (1)
- Distributed fibre optic sensors (1)
- Diversity (1)
- Driving physical mechanism (1)
- Droplet (1)
- Druckgasspeicher (1)
- Dual-energy (1)
- Ductile iron (1)
- Durchschlagfestigkeit (1)
- Dwell-Fatigue (1)
- Dynamic mechanical analysis (1)
- Dynamisch Mechanische Analyse (1)
- EAC-1A (1)
- EASA (1)
- EC4SafeNano (1)
- EIS (1)
- EN AW 2618A (1)
- EN AW 2618A a (1)
- EPR (1)
- Early oxidation (1)
- Eigenschaften (1)
- Eigenspannung (1)
- Elastic constants (1)
- Elastic microstructure (1)
- Elasticity (1)
- Elctronic Lab Notebook (1)
- Electric field distribution (1)
- Electric field strength (1)
- Electrical insulation (1)
- Electrochemical deposition (1)
- Electrochemical dressing (1)
- Electromicroscopy (1)
- Electron Microscopy (1)
- Electron backscatter diffraction (1)
- Electron backscattered diffraction (EBSD) (1)
- Electron beam-induced fragmentation (1)
- Electron diffraction (1)
- Electron energy (1)
- Electropolishing (1)
- Elektronisches Laborbuch (ELN) (1)
- Elektrotechnische Grundlagen (1)
- Enamel (1)
- Endurance Limit (1)
- Energiedisersive Röntgenspektroskopie (1)
- Energiespeicherung (1)
- Energiewende (1)
- Energy distribution (1)
- Energy harvesting (1)
- Energy transition (1)
- Entwicklung (1)
- Environmentally assisted cracking (1)
- Epoxidharz (1)
- Epoxy (1)
- Ermüdungsriss (1)
- Etching (1)
- European Centre (1)
- Explosionsschutz (1)
- FAIR Data (1)
- FAIR Data Management (1)
- FAIR data. (1)
- FAIR principles (1)
- FCH JU (1)
- FNCT (1)
- FT-IR (1)
- Fabrication method (1)
- Failure test (1)
- Faser (1)
- Faser-Kunststoff-Verbund (1)
- Faseroptik (1)
- Faserverstärkte Kunstoffe (1)
- Fatigue Crack Growth (1)
- Fatigue Life Evaluation (1)
- Fatigue crack propagation (1)
- Fatigue damage (1)
- Fatigue fracture (1)
- Fatigue of sandwich structures (1)
- Fatigue performance (1)
- Fatigue testing (1)
- Federkonstante (1)
- Feldspar (1)
- Fem (1)
- Female noble prize winners (1)
- Ferritic Alloys (1)
- Fertigungsprozess (1)
- Fertigungstechnologie (1)
- Festigkeit (1)
- Fiber (1)
- Fiber reinforced polymers (1)
- Film depositition (1)
- Fine Powder (1)
- Finite element analysis (1)
- Finite elmenet simulation (1)
- Finite-Elemente-Methode (1)
- First year students (1)
- Flipped classroom (1)
- Flow Coefficient (1)
- Flowability (1)
- Fluorescence spectroscopy (1)
- Fluoride nanoparticles (1)
- Fluorolytic sol−gel (1)
- Focused Ion Beam (1)
- Focussed ion beam growth (1)
- Foliengießen (1)
- Force-distance diagram (1)
- Formerkennung (1)
- Fourier transform infrared spectroscopy (1)
- Fracture (1)
- Fracture Mechanics (1)
- Fracture behavior (1)
- Fracture mechanics (1)
- Fracture surface energy (1)
- Fracture toughness (1)
- Fragility (1)
- Freeze Drying (1)
- Fresnoit (1)
- Full Notch Creep Test (FNCT) (1)
- Full-Notch Creep Test (1)
- Full-notch creep test (1)
- Functional fatigue (1)
- Fungi (1)
- Fused Filament Fabrication (1)
- GC-MS (1)
- GFRP (1)
- Gas flow assisted powder deposition (1)
- Gas permeation (1)
- Gas storage (1)
- Gasabgabe (1)
- Gasdetektion (1)
- Gasgehalt (1)
- Gasturbinen (1)
- Gd3+ (1)
- Gefüge (1)
- Gefüge (Werkstoffkunde) (1)
- Gefügeuntersuchung (1)
- Gefügte Nickelbasislegierungen (1)
- General Aviation (1)
- General Chemistry (1)
- Geometrical factors (1)
- Geopolymers (1)
- Gitterfehlpassung (1)
- Glas fibre reinforced polymer (1)
- GlasDigital (1)
- Glasfaserverstärkter Kunststoff (1)
- Glasmatrixkomposit (1)
- Glass Fibres (1)
- Glass ceramic (1)
- Glass fiber reinforced polymer (1)
- Glass fibre reinforced plastics (1)
- Glass forming (1)
- Glass liner (1)
- Glass matrix composite (1)
- Glass melt (1)
- Glass melting (1)
- Glass scintillator (1)
- Glass screening device (1)
- Glass structure (1)
- Glass transformation temperature (1)
- Glass-ceramic (1)
- Glasses (1)
- Glasspeicher (1)
- Gleichgewicht (1)
- Gold nanoparticle synthesis (1)
- Gradient-enhanced damage (1)
- Grain boundaries (1)
- Granules (1)
- Granulometrie (1)
- Graphic design (1)
- Grenzflächenenergie (1)
- Grundlagen des Maschinenbaus (1)
- Grünfolieneigenschaften (1)
- Gypsum (1)
- HCF (1)
- HDPE Soprption (1)
- HDPE Sorption (1)
- HV-Insulation (1)
- Hardness test (1)
- Hartbearbeitung (1)
- Heat Treatments (1)
- Heißgasextraktion (1)
- Heißgaskorrosion (1)
- High - temperature corrosion (1)
- High Entropy Alloys (1)
- High Voltage Insulation (1)
- High alloyed steels (1)
- High cycle fatigue (1)
- High energy radiation (1)
- High entropy superalloys (1)
- High pressure gas storage (1)
- High-Temperature Corrosion (1)
- High-density polyethylene (PE-HD) (1)
- Hochentropielegierung (1)
- Hochentropielegierungen (1)
- Hochleistungskeramik (1)
- Hochspannungsprüfung (1)
- Hochtemperaturbrennstoffzelle (1)
- Hochtemperaturermüdung (1)
- Honing (1)
- Honing Stone (1)
- Horizon 2020 (1)
- Host-guest hybrid materials (1)
- Hot Press (1)
- Hot isostatic pressing (1)
- Hot isostatic pressing (HIP) (1)
- Hot pressing (1)
- Hot stage microscopy (1)
- Hybrid Manufacturing (1)
- Hydrogen gas (1)
- Hydrogen permeability (1)
- Hydrogen sensor (1)
- Hydrogen sensors (1)
- Hydrogen storage tank (1)
- Hyper-arid (1)
- IN738LC (1)
- IR spectroscopy (1)
- Imaging (1)
- Implant failures (1)
- Implants (1)
- In situ synthesis (1)
- In-Situ Testing (1)
- In-situ tomography (1)
- In718 (1)
- Inconel 625 (1)
- Inconel 686 coating (1)
- Inconel 718 (1)
- Indentation hardness (1)
- Informationstechnische Grundlagen (1)
- Initial attachment (1)
- Interface Strength (1)
- Interfacial Spinodal (1)
- Interfacial shear strength (1)
- Intermediate scale (1)
- Intermetallische FeAl-Legierungen (1)
- Inverse ostwald ripening (1)
- Investment casting (1)
- Ionic porosity (1)
- Iron oxide (1)
- Irregular topography (1)
- Kalzinierung (1)
- Kennwertermittlung (1)
- Keramische Folien (1)
- Kikuchi diffraction (1)
- Kikuchi pattern (1)
- Klebung (1)
- Knowledge Graph (1)
- Knowledge Graphs (1)
- Komponentenprüfung (1)
- Kreislaufwirtschaft (1)
- Kriechermüdung (1)
- Kriechversuche (1)
- Kristallisation (1)
- Kristallorientierung (1)
- Kristallsystem (1)
- Kunststoffe (1)
- Kupfer (1)
- Kurzfaser-verstärkte Thermoplaste (1)
- Kurzzeitfestigkeit (1)
- L-PBF 316L (1)
- LMD (1)
- LTCC multilayer (1)
- Laminographie (1)
- Langzeitstabilität (1)
- Laser Beam Melting (1)
- Laser Cladding (1)
- Laser Poeder Bed Fusion (1)
- Laser Scanning Microscopy (1)
- Laser Scanning Microscopy (LSM) (1)
- Laser curing (1)
- Laser induced slipcasting (1)
- Laser light scattering (1)
- Laser-Pulverbettschmelzen (1)
- Laser-induced slip casting (1)
- Laserbearbeitung (1)
- Laserscanningmikroskopie (LSM) (1)
- Lattices (1)
- Layer depostion (1)
- Layer system (1)
- Lebensdauervorhersage (1)
- Lecture films (1)
- Lecture videos (1)
- Legierung mit komplexer Zusammensetzung (1)
- Lehrfilm (1)
- Lehrfilmformate (1)
- Li-ion battery (1)
- Life cycle (1)
- Lifetime prediction (1)
- Lightweighting (1)
- Limestone Filler (1)
- Lithium-ion batteries (1)
- Lithography-based technologies (1)
- Local landscape evolution (1)
- Localized plasmons (1)
- Long-term storage (1)
- Lorenz transmission electron microscopy (1)
- Low Cycle Fatigue (LCF) (1)
- Low-Cycle Fatigue (LCF) (1)
- Low-Cycle-Fatigue (1)
- Low-cycle fatigue. (1)
- Low-cycle-fatigue behaviour (1)
- Lösungsmittel (1)
- Lötverbindung (1)
- MOUSE (1)
- Magnetic domains (1)
- Magnetische Domänen (1)
- Magnetoelastic effect (1)
- Magnetoelastischer Effekt (1)
- Martensitic steel (1)
- Mass transport (1)
- Masterschädigungslinie (1)
- Mat-o-lab (1)
- Material Life Cycle (1)
- Material characterization (1)
- Material defects (1)
- Material degradation (1)
- Material oxidation (1)
- MaterialDigital (1)
- Materialcharakterisierung (1)
- Materialentwicklung (1)
- Materialkreislauf (1)
- Materialmodell (1)
- Materialprüfung (1)
- Materials Chemistry (1)
- Materials Data Space (1)
- Materials Modelling (1)
- Materials Science (1)
- Materials and Processes Data Reusability (1)
- Materials science (1)
- Materials testing (1)
- Materialwissenschaft (1)
- Mathematisch-naturwissenschaftliche Grundlagen (1)
- Matrix (1)
- Mechanical Behavior (1)
- Mechanical Engineering (1)
- Mechanical Properties (1)
- Mechanical and thermal testing (1)
- Mechanics of Materials (1)
- Mechanisches Verhalten (1)
- Mechanistic Modelling (1)
- Medium Entropy Alloys (1)
- Medium entopy alloy (1)
- Medium entropy alloy (1)
- Medium-entropy alloy (1)
- Mehrachsige Verformung (1)
- Mehrskalenmodell (1)
- Melt pool boundary (1)
- Metal powder characterization (1)
- Metall (1)
- Metallic components (1)
- Metallic glasses (1)
- Metallic silver precipitates (1)
- Metallography (1)
- Metals and Alloys (1)
- Metformin (1)
- Metrologie (1)
- Metrology (1)
- Micro computed tomography (1)
- Micro-shrinkages (1)
- Microbiologically influenced corrosion (1)
- Microhardness (1)
- Micromanipulation (1)
- Microsegregation (1)
- Microstructural evolution (1)
- Microstructural orientation (1)
- Microstructure Analysis (1)
- Microstructure Characterization (1)
- Microstructure Evolution (1)
- Microstructure characterisation (1)
- Microstructure design (1)
- Microstructure modification (1)
- Mid-Level Ontology for MSE (1)
- Mikro-Computertomographie (1)
- Mikrogravitation (1)
- Mikrostrukturuntersuchung (1)
- Mindedestberstdruck (1)
- Mini-UAV (1)
- Missing acknowledgment (1)
- Mixed Ca-K-Na phosphates (1)
- Mn3O4 (1)
- Model alloy (1)
- Modell (1)
- Molecular Dynamics (1)
- Molecular dynamics (1)
- Monte-Carlo-Analysis (1)
- Mortar (1)
- Mortel (1)
- Multi-principal element alloys (1)
- Multiaxial deformation (1)
- Multiaxial stress state (1)
- NFDI-MatWerk (1)
- NIST (1)
- NMR (1)
- Na and K rhenanites (1)
- Nahinfrarotspektroskopie (1)
- Nano CRM (1)
- Nano material (1)
- Nano metal fluorides (1)
- Nano-assemblies (1)
- Nano-ceramic-additive-manufacturing photoresin (1)
- Nano-landscape (1)
- Nano-powder characterization (1)
- Nano-safety (1)
- NanoCAM (1)
- Nanoindentation (1)
- Nanomaterial screening (1)
- Nanomaterials (1)
- Nanoparticle synthesis (1)
- Nanopartikel (1)
- Nanoplattform (1)
- Nanostructure (1)
- Nanostructure quantification (1)
- Negative charged microparticle (1)
- Net zero (1)
- Networking (1)
- Neutron Diffraction (1)
- New standards (1)
- Ni-Mn-Ga (1)
- Nickel based coatings (1)
- Nickel-base alloy (1)
- Nickel-base superalloy (1)
- Nimonic 75 (1)
- Niobium alloying (1)
- Noble metal nanoparticles (1)
- Non-Destructive Testing (1)
- Non-desired foaming (1)
- Nondestructive testing (1)
- Nucleation (1)
- Nucleation mode (1)
- Nucleation tendency (1)
- Numerische Simulation (1)
- OECD TG (1)
- Oberflächenaktive wässrige Medien (1)
- Oberflächenkeimbildung (1)
- Online (1)
- Online quality control (1)
- Online teaching (1)
- Ontologies (1)
- Ooxidation (1)
- Optic (1)
- Optical backscatter reflectometry (1)
- Optical criterion (1)
- Optical fibre (1)
- Optical properties (1)
- Optical properties of glasses and ceramics (1)
- Optical spectroscopy (1)
- Orientation-dependent microstructure (1)
- Overaging (1)
- Oxide glass (1)
- Oxide scale (1)
- Oxides (1)
- P92 steels (1)
- PA6.6 (1)
- PPA (1)
- Parametric modeling (1)
- Particle Size Distribution (1)
- Particle morphology (1)
- Particle size determination (1)
- Particle-bed binder jetting (1)
- Partikelgröße (1)
- Patent (1)
- Pattern matching (1)
- Peem (1)
- Permeability (1)
- Persistent luminescence (1)
- Persistent luminescent (1)
- Phase Diagrams (1)
- Phase Separation (1)
- Phase analysis (1)
- Phase diagram (1)
- Phase field simulation (1)
- Phase separation (1)
- Phase transformation (1)
- Phase transformations (1)
- Phase-Field Simulation (1)
- Phase-Field Simulations (1)
- Phase-field (1)
- Phase-field Simulation (1)
- Phosphors (1)
- Photocatalysis (1)
- Photodynamic therapy (1)
- Physical properties (1)
- Physically based material model (1)
- Physics-informed Neural Network (1)
- Phytolith (1)
- Planetary surface (1)
- Platform Material Digital (1)
- Platform Material Digital (PMD) (1)
- Platform MaterialDigital (1)
- Platform MaterialDigital (PMD) (1)
- Plattform Material Digital (PMD) (1)
- Pole figures (1)
- Polyethylene (1)
- Polymer Matrix Composite (1)
- Polymer-Ceramic-Composite (1)
- Polymer-ceramic mixtures (1)
- Polymerwissenschaften (1)
- Porcelain (1)
- Pores (1)
- Portfolio (1)
- Powder bed density (1)
- Powder deposition (1)
- Powder-based processes (1)
- Powdered activated carbon (1)
- Power plant (1)
- Power-to-Gas (1)
- Precipitates (1)
- Precipitation Analysis (1)
- Precipitation hardening (1)
- Preparation (1)
- Pressure assisted sintering (1)
- Pressure-assisted sintering (1)
- ProMoAM (1)
- Process (1)
- Process Monitoring (1)
- Proficiency test (1)
- Property simulation (1)
- Protection (1)
- Prozessmonitoring (1)
- Pull-out (1)
- Pull-out composite materials (1)
- Pycnometry (1)
- Quality assurance (1)
- Quantitative Precipitation Analysis (1)
- Quantitative image analysis (1)
- Quantum dots (1)
- Radiation-matter interaction (1)
- Radii distribution (1)
- Rafting (1)
- Raman (1)
- Raman spectroscopy (1)
- Real time growth control (1)
- Recycling (1)
- Reference Data (1)
- Reference Dataset (1)
- Reference Material (1)
- Reference material BCR-425 (1)
- Reference nanomaterials (1)
- Reference nanoparticles (1)
- Referenzmaterial (1)
- Referenzorganismus (1)
- Referenzverfahren (1)
- Refractory chemically complex alloy (1)
- Refractory chemically complex alloys (1)
- Refractory high entropy alloys (1)
- Regelwerke (1)
- Relaxation (1)
- Relaxation metallic glasses (1)
- Relaxation tests (1)
- Relaxationsphänomene (1)
- Reliable characterization (1)
- Renewable ernergy (1)
- Repair of sandwich shell structures (1)
- Repair patch (1)
- Reproducibility (1)
- Residual stress analysis (1)
- Resistance (1)
- Resistance stress (1)
- Restberstfestigkeit (1)
- Reusability (1)
- Review (1)
- Rheology (1)
- Rhodonia placenta (1)
- Risikoanalyse (1)
- Rissausbreitung (1)
- Risse (1)
- Rissform (1)
- Rissfortschritt (1)
- Rissheilung (1)
- Rissverlauf (1)
- Robot-assisted galss melting (1)
- Robotic glass melting (1)
- Rohrprobekörper (1)
- Rotorblatt (1)
- Rotorblätter (1)
- S-Phase (1)
- SEM wood characterization (1)
- SEN-Probe (1)
- SHM (1)
- Safety assessment (1)
- Sailplane Development Panel (1)
- Sall-angle scattering (1)
- Salt melt (1)
- Salzschmelzen (1)
- Sandwich structures (1)
- Sandwichstruktur (1)
- Scaffold (1)
- Scanning Electron Microscopy (SEM) (1)
- Scanning electron microscope (1)
- Scanning electron microscopy (SEM) (1)
- Scanning transmission electron microscopy (STEM) (1)
- Scarf joint repair (1)
- Scarf joint repairs (1)
- Schadenskunde (1)
- Schalenprüfstand (1)
- Schlickerdeposition (1)
- SchwarzP cells (1)
- Schwerelosigkeit (1)
- Schwingbrüche (1)
- Schwingstreifen (1)
- Screen printing (1)
- Screening method (1)
- Segregation Engineering (1)
- Self-healing (1)
- Semantic Interioerability (1)
- Semantic Web technologies (1)
- Semantic structuring (1)
- Semantic web (1)
- Semantische Daten (1)
- Semiconductor materials (1)
- Sensing (1)
- Sensor (1)
- Sewage treatment plant (1)
- Shape-memory alloys (1)
- Silber (1)
- Silicatglas (1)
- Silikatkeramik (1)
- Silver (1)
- Silver cluster (1)
- Silver glass paste (1)
- Silver metallization paste (1)
- Silver precipitates (1)
- Silver-glass metallization paste (1)
- Simulation of concrete (1)
- Simulation workflow (1)
- Simulationsgestützte Gießkonzepte (1)
- Single crystal (1)
- Single crystal superalloys (1)
- Single-Crystal (1)
- Single-crystals (1)
- Sinter retardation (1)
- Sintering atmosphere (1)
- Sintermechanismen (1)
- Sintertemperatur (1)
- Sinterung (1)
- Size (1)
- Size and size distribution (1)
- Sliding simulation (1)
- Slip-rolling (1)
- Slow Crack Growth (SCG) (1)
- Slow crack growth (1)
- Slow crack growth (SCG) (1)
- Small angle x-ray scattering (1)
- Small-Angle X-ray Scattering (1)
- Small-angle scattering (1)
- Soda-lime-silica glass (1)
- Sodium zinc borate glass (1)
- Sodiumborosilicate glasses (1)
- Soil sample (1)
- Solid solution strengthening (1)
- Solidification (1)
- Space (1)
- Space exploration (1)
- Spark plasma sintering (1)
- Specific surface (1)
- Spezifische Oberfläche (1)
- Spinodal Decomposition (1)
- Split Hopkinson bar (1)
- Spring constant (1)
- Stainless steel (1)
- Stanzen (1)
- Steels (1)
- Strain rate dependence (1)
- Stratégies deprévention (1)
- Strength (1)
- Streuung (1)
- Structural health monitoring (SHM) (1)
- Structural steel (1)
- Structure (1)
- Structure property correlations (1)
- Structure-property correlation (1)
- Structured Data (1)
- Structured heating (1)
- Subsurface defects (1)
- Superalloy single crystals (1)
- Superalloys (1)
- Superaustenite steel (1)
- Supercritical/dense phase CO 2 (1)
- Superelasticity (1)
- Superlattice extrinsic stacking faults (1)
- Superlegierungen (1)
- Surface Nucleation (1)
- Surface nucleation (1)
- Surface-induced Melting (1)
- Swept wavelength interferometry (SWI) (1)
- Symbolik (1)
- Symmetric dwell periods (1)
- Synchrotron (1)
- Synchrotron CT (1)
- Synchrotron radiation (1)
- Synchrotron tomography (1)
- Systematische Schadensanalysen, Prozeduren (1)
- TAHYA (1)
- TED (1)
- TMF experiments (1)
- Tb3+ (1)
- Technical Ceramics (1)
- Technische Keramik (1)
- Temperature driven process (1)
- Tempered martensite ferritic steel (1)
- Tempered martensite ferritic steels (1)
- Tempered martensite-ferritic steel (1)
- Tensile stress relaxation (1)
- Tensile stress relaxation testing (1)
- Termites (1)
- Test Improvement (1)
- Texturation (1)
- Theranostics (1)
- Thermal degradation (1)
- Thermal stress (1)
- Thermische Analyse (1)
- Thermo mechanical fatigue (1)
- Thermo-mechanical fatigue (1)
- Thermo-mechanical-loading (1)
- Thermo-mechanics (1)
- Thermo-optical measurement (1)
- Thermoanalysis (1)
- Thermoanalytical Methods (1)
- Thermodynamic analysis (1)
- Thermodynamic stability (1)
- Thermodynamische Stabilität (1)
- Thermoelectric generator (1)
- Thermoelectric generator design (1)
- Thermoelectric oxide (1)
- Thermoelectric oxides (1)
- Thermoelektrika (1)
- Thermoelektrischer Generator (1)
- Thermogravimetric analysis (1)
- Thermomechanical Fatigue (TMF) (1)
- Thermomechanische Eigenschaften (1)
- Thermomechanische Ermüdung (1)
- Thermophysikalische Eigenschaften (1)
- Thermoplastic (1)
- Thesaurus (1)
- Thin tribofilm (1)
- Time-offlight Diffraction (TOFD) (1)
- Tomography (1)
- Tools (1)
- Tooth wear (1)
- Transducers (1)
- Transmission electron microscope (TEM) (1)
- Two-photon adsorption (1)
- Two-photon polymerization (1)
- Ultraschall (1)
- Ultrasonic Testing (1)
- Umgebungsbedingter Spannungsriss (1)
- Under cyclic loading (1)
- Ungleichgewicht (1)
- Unlegierter Baustahl (1)
- Upconversion (1)
- Upconversion nanoparticles (1)
- Utilization, and storage (CCUS) technology (1)
- VCSEL (1)
- VM12 SHC (1)
- Vacancies (1)
- Vacuum hot extraction (1)
- Verbundwerkstoff (1)
- Verbundwerkstoffe (1)
- Vernetzung (1)
- Versetzungsstrukturen (1)
- Very high cycle fatigue (1)
- Vickers Hardness (1)
- Vickers indentation (1)
- Virtueller Materialdatenraum (1)
- Viscose sintering (1)
- Viscous sintering (1)
- Viskoplastisch (1)
- Volume Fraction (1)
- Volume specific surface area (1)
- Wasserstoff (1)
- Wasserstofferzeugung (1)
- Waste water (1)
- Water-based (1)
- Weibull distribution (1)
- Welding processing influences (1)
- Werkstoffauswahl (1)
- Werkstoffdaten (1)
- Werkstoffkennwerte (1)
- Werkstoffmechanische Prüfung (1)
- Wet dispersion (1)
- White light emitters (1)
- Wind turbine blade shell structures (1)
- Windkraft (1)
- Withstand voltage tests (1)
- Women in science (1)
- Workshop (1)
- Wärmespeicher (1)
- X-ray imaging (1)
- X-ray refractography (1)
- X-ray scattering (1)
- XRM (1)
- Young´s Modulus (1)
- Young’s Modulus (1)
- ZfP (1)
- Zirconia: yttria stabilized (1)
- Zug-Druck-Schubprüfung (1)
- Zugversuchsontologie (1)
- Zyklische Belastung (1)
- Zyklische R-Kurve (1)
- alumina (1)
- arbon capture (1)
- ausfgallfreie Lastwechsel (1)
- bioactive (1)
- biomaterials (1)
- bone (1)
- carbon steel (1)
- ceramic (1)
- ceramics (1)
- coarsening (1)
- condensate (1)
- dental (1)
- dispersion (1)
- electrochemical characterization (1)
- hardness (1)
- high entropy alloys (1)
- hydrogen storage (1)
- impurities (1)
- laser cladding (1)
- microstructure analysis (1)
- multi scale testing (1)
- oxidation (1)
- particle size determination (1)
- pitting corrosion (1)
- sample preparation (1)
- scanning electron microscopy (1)
- selective laser melting (1)
- statistische Auswertung (1)
- sulfidation (1)
- thermomechanische Beanspruchung (1)
- utilization, and storage (CCUS) technology (1)
- volume resistivity (1)
- zertifizierte Referenzmaterialien (1)
- Überblick (1)
Organisationseinheit der BAM
- 5 Werkstofftechnik (782)
- 5.2 Metallische Hochtemperaturwerkstoffe (211)
- 5.1 Mikrostruktur Design und Degradation (206)
- 5.4 Multimateriale Fertigungsprozesse (157)
- 5.6 Glas (107)
- 5.3 Polymere Verbundwerkstoffe (95)
- 5.5 Materialmodellierung (71)
- 8 Zerstörungsfreie Prüfung (71)
- 7 Bauwerkssicherheit (62)
- 9 Komponentensicherheit (60)
Es wird eine neu entwickelte Methode zur Thermographiebasierten Rissmessung vorgestellt. Darüber hinaus wird eine numerische Vorarbeit präsentiert, die zeigt, dass anhand der gemeisamen Auswertung der Versuchsdaten aus unterschiedlicher Sensorik die Möglichkeit besteht, die unter Ermüdungsbelastung in Bohrlochproben auftretenden Risse in Geometriekategorien zu unterteilen.
The methods of computational damage mechanics are well-established for the description of degradation of materials under monotone loading. An extension to structural damage induced by cyclic loading is however significantly limited. This is due to enormous computational costs required to resolve each load cycle by conventional temporal incremental integration schemes while a typical fatigue loading history comprises between thousands and millions of cycles. Despite the permanent increase of computational resources and algorithmic performance, a successful approach is rather based on the development of novel multiscale in time integration schemes.
A Fourier transformation-based temporal integration (FTTI) is represented, which takes advantage of temporal scale separation incorporated into the cycle jump method. The response fields are approximated by a Fourier series whose coefficients undergo the evolution on a long-time scale. This is correlated with the evolution of the history variables, including damage, by means of the adaptive cycle jump method of various orders. The necessary extrapolation rates are obtained from the underlying solution of a short-time scale problem, which results from the oscillatory boundary condition and fulfills the global equilibrium of the Fourier coefficients. In this way, a remarkable speedup is achieved because the number of cycles to be fully integrated dramatically decreases.
The key idea behind the FTTI method is that the global in space equilibrium problem is linear since it is decoupled from the evolution equations. The latter are solved in the quadrature points under response fields prescribed throughout the whole load cycle. Consequently, integration of a single load cycle is much more efficient than the conventional single scale integration where the global equilibrium iteration and the local iteration of the evolution equations are coupled. This results in an additional speedup of the FTTI method.
The performance of the FTTI technique is demonstrated for two different constitutive behaviors: a viscoplastic model with a damage variable governed by the local equivalent viscoplastic strain; a quasi-brittle response where the damage variable is driven by a non-local equivalent strain. The latter is implicitly introduced as proposed by Peerlings. Both, the explicit and implicit extrapolation schemes are validated. The FTTI solutions agree very well with the reference cycle-by -cycle solutions, while significantly reducing the computational costs. The adaptive determination of the jump length can properly recognize the particular responses throughout the fatigue loading history (stationary fatigue, acceleration of fatigue damage when approaching failure) as well as stress redistribution phenomena.
A constitutive model for the mechanical behaviour of single crystal Ni-base superalloys under high temperature conditions has been developed in the framework of a Cooretec project in cooperation with Siemens AG, MTU Aero Engines AG and University Bayreuth. In addition to the conventional material properties e.g. elastic constants, the model requires the parameters of the initial microstructure as an input. Thus, the γ’-precipitate size and the channel width of the γ-matrix were obtained from SEM micrographs. The model uses the slip system theory and describes the movement, multiplication and annihilation of dislocations in the channels. Furthermore, the cutting of precipitates is another mechanism contributing to the plastic flow. The evolution of the morphology due to rafting and its effects on the deformation have been implemented according to. The kinematic hardening is introduced as a stress tensor to realistically represent the strain hardening of arbitrary oriented single crystals.
The mechanical behaviour of single crystal specimens has been experimentally investigated in tension tests at different strain rates and in creep tests under various loads. The constitutive model has been calibrated based on the experimental data for temperatures of 950°C and 850°C and the [001] and [111] crystallographic orientations.
Finally, a micromechanical model was created to simulate the creep response of additive manufactured polycrystalline structures. An EBSD image is taken to obtain the grain geometry and their respective orientation. The grain boundaries are discretised using cohesive elements, whereas the single crystal model was applied to each grain in the representative volume. The polycrystal model is generated using Dream3D, NetGen and other software previously developed at the BAM.
Sandwich-Schalenstrukturen in situ charakterisiert mit Thermographie und Felddehnungsmessungen
(2018)
An der BAM wurde ein Schalenprüfstand entwickelt, mit dem typische Sandwichschalenstrukturen unter simulierter Betriebsbeanspruchung belastet werden können. Im mechanischen Ermüdungsversuch wurden in situ die Entstehung von Schäden in Schalenprüfkörpern mit Test-Imperfektionen mittels der passiven Thermographie und Felddehnungsmessungen verfolgt. Damit konnten der Zeitpunkt, der Schadensursprung und der Schadensfortschritt zerstörungsfrei bestimmt werden. Zudem wurden vergleichend Schalenprüfkörper mit Luftultraschall und der Röntgen-Laminographie untersucht. Im Rahmen eines BMWi-Forschungsvorhabens wurden die Schädigungsmechanismen evaluiert und Empfehlungen für die Praxis der Fertigung von Rotorblättern abgeleitet. In diesem Beitrag wird sich auf die Darstellung der ZfP-Verfahren und der ZfP-Ergebnisse konzentriert.
Die warmfeste austenitische Gusseisenlegierung EN-GJSA-XNiSiCr35-5-2 (häufig auch als Ni-Resist D-5S bezeichnet) wurde hinsichtlich ihres mechanischen Verhaltens bei hoher Temperatur charakterisiert. Dazu wurden (isotherme) niederzyklische (LCF-) und (nicht-isotherme) thermomechanische Ermüdungsversuche (TMF) zwischen Raumtemperatur und 900 °C durchgeführt. Diese Ergebnisse dienten (zusammen mit weiteren Versuchsdaten) der Kalibrierung werkstoffmechanischer Modelle. Bei den höchsten Prüftemperaturen wurde Schädigung in Form von Kriechen beobachtet und metallographisch dokumentiert.
Impact of acid condensation on wetting and corrosion behavior of CO2 transport-pipeline steel
(2018)
Es ist allgemein akzeptiert, das Korrosion in CO2-Transport-Pipelines vernach¬lässigbar ist, solange der Wassergehalt des CO2-Stroms deutlich unter der maximal löslichen Menge liegt. Bisher gibt es keinen allgemeinen Konsens darüber, welcher maximale Wassergehalt in zu transportierendem CO2 zugelassen werden sollte. Bei einem Druck von 100 bar und im Temperaturbereich von 277 K bis 298 K beträgt die Löslichkeit von Wasser in CO2 ca. 1.900 bis 3.200 ppmv, aber die Korrosionsrate von Stählen steigt schon ab einem Wassergehalt von 500 ppmv deutlich an. Bei Anwesenheit von Begleitstoffen wie SO2, NO2 und O2, können sich HNO3, H2SO3 und H2SO4 bilden. Menge und Zusammensetzung von kondensierter Säure sind von der Gaszusammensetzung abhängig, und der Korrosionsmechanismus und die Korrosionsform sind vom Kondensationsverhalten abhängig.
Virtual-lab-based determination of a macroscopic yield function for additively manufactured parts
(2018)
This work presents a method for the yield function determination of additively manufactured parts of S316L steel. A crystal plasticity model is calibrated with test results and used afterwards to perform so-called virtual experiments, that account for the specific process-related microstructure including crystallographic and morphological textures. These simulations are undertaken on a representative volume element (RVE), that is generated from EBSD/CT-Scans on in-house additively manufactured specimen, considering grain structure and crystal orientations. The results of the virtual experiments are used to determine an anisotropic Barlat yield function, that can be used in a macroscopical continuum-sense afterwards. This scale-bridging approach enables the calculation of large-scale parts, that would be numerically too expensive to be simulated by a crystal plasticity model.
Additive Manufacturing (AM) through the Selective Laser Melting (SLM) route offers ample scope for producing geometrically complex parts compared to the conventional subtractive manufacturing strategies. Nevertheless, the residual stresses which develop during the fabrication can limit application of the SLM components by reducing the load bearing capacity and by inducing unwanted distortion, depending on the boundary conditions specified during manufacturing.
The present study aims at characterizing the residual stress states in the SLM parts using different diffraction methods. The material used is the nickel based superalloy Inconel 718. Microstructure as well as the surface and bulk residual stresses were characterized. For the residual stress analysis, X-ray, synchrotron and neutron diffraction methods were used. The measurements were performed at BAM, at the EDDI beamline of -BESSY II synchrotron- and the E3 line -BER II neutron reactor- of the Helmholtz-Zentrum für Materialien und Energie (HZB) Berlin.
The results reveal significant differences in the residual stress states for the different characterization techniques employed, which indicates a dependence of the residual state on the penetration depth in the sample. For the surface residual stresses, longitudinal and transverse stress components from both X-ray and synchrotron agree well and the obtained values were around the yield strength of the material. Furthermore, synchrotron mapping disclosed gradients along the width and length of the sample for the longitudinal and transverse stress components. On the other hand, lower residual stresses were found in the bulk of the material measured using neutron diffraction. The longitudinal component was tensile and decreased towards the boundary of the sample. In contrast, the normal component was nearly constant and compressive in nature. The transversal component was almost negligible. The results indicate that a stress re-distribution takes place during the deposition of the consecutive layers. Further investigations are planned to study the phenomenon in detail.
The Topic of the presentationis a discussion on defects which can cause failure in cyclically loaded metallic components. Although also touching Features such as material defects such as pores or micro-shrinkages, etc. and geometric defects such as surface roughness and secondary notches (which are not considered in the design process) which origin in manufacturing, and others the presentation concentrates on non-metallic inclusions. It is prefaced by an introduction to the life cycle of a fatigue crack from initiation up to fracture. Special emphasis is put on the fact that only cracks which are not arrested during one of their distinct Propagation stages can grow to a critical size.
Die warmfeste austenitische Gusseisenlegierung EN-GJSA-XNiSiCr35-5-2 (häufig auch als Ni-Resist D-5S bezeichnet) wurde hinsichtlich ihres mechanischen Verhal-tens bei hoher Temperatur charakterisiert. Dazu wurden (isotherme) niederzyklische (LCF-) und (nicht-isotherme) thermomechanische Ermüdungsversuche (TMF) zwischen Raumtemperatur und 900 °C durchgeführt. Diese Ergebnisse dienten (zu-sammen mit weiteren Versuchsdaten) der Kalibrierung werkstoffmechanischer Modelle. Bei den höchsten Prüftemperaturen wurde Schädigung in Form von Kriechen beobachtet und metallographisch dokumentiert.
In der vorliegenden Arbeit wurden verschiedene Epoxidharzsysteme charakterisiert. Zwei Systeme mit großen bruchmechanischen Unterschieden wurden zur Fertigung äquivalenter GFK- und CFK-Laminate mit Faserausrichtungen in 0/90° und ±45° ausgewählt. In quasi-statischen Zugversuchen und Einstufenschwingversuchen mit einem Beanspruchungsverhältnis von R= 0,1 wurden diese Laminate hinsichtlich ihres Schädigungsbeginns und ihrer Schädigungsentwicklung untersucht. Die Detektion der Schädigungen sowie die Dokumentation der Schädigungsentwicklung wurde anhand der Lichtabsorptionsanalyse an GFK-Laminaten und anhand der Röntgenrefraktionsanalyse an CFK-Laminaten umgesetzt. Auf diese Weise konnten Einflüsse der bruchmechanischen Eigenschaften der Matrix auf die Schädigungsentwicklung im Verbund aufgezeigt werden. Zudem wurden für die untersuchten Laminate die Schädigungsgrenzen bei schwingender Beanspruchung ermittelt. Anhand durchgeführter Schwingversuche an CFK-Laminaten im Very High Cycle Fatigue-(VHCF)-Lastwechselbereich bis 108 konnten Rückschlüsse vom Schädigungsverhalten im High Cycle Fatigue-(HCF)-Lastwechselbereich bis 106 auf die Dauerfestigkeit im VHCF-Bereich gezogen werden und damit VHCF-Dauerfestigkeitsgrenzen bestimmt werden. Mit dem Ziel die Ermüdung der Laminate auf die Beanspruchung der Matrix zurückzuführen, wurden die Erweiterte Inverse Laminattheorie, mikromechanikbasierte Mischungsregeln sowie eine Vergleichsspannungshypothese auf die untersuchten Laminate angewendet. Die Schädigungsgrenzen konnten damit in Form der Matrixbeanspruchung wiedergegeben werden. Die Abbildung der Ermüdung verschiedener Laminate anhand einer matrixspezifischen normierten Masterschädigungslinie ist für die behandelten CFK- und GFK-Laminate gelungen.
This work presents the microstructure and chemical composition of oxide scales created on Ni – base coating after corrosion experiments in aggressive gases and ashes. The Inconel 686 coating applied on the low carbon steel 13CrMo4-5 was performed by a CO2 laser cladding process. The experiments were carried out in oxidizing gas atmospheres containing O2, COx, SOx. The second Variation of corrosion experiments were performed in a reducing atmosphere with ashes containing elements such as: Na, Cl, Ca, Si, C, Fe, Al etc. After 240 h and 1.000 h corrosion experiments the oxide scales on the substrate and overlay were created in both cases.
The sulfur compounds were found on the top of the coating surface (EPMA) and also higher contents of silica compounds were revealed on specimens covered by ashes during the experiments. The microstructure and chemical composition of the clad and scales were investigated by means of a light microscope and an electron microscope (SEM)equipped with an EDS detector.
All in all, practicing professionals as well as researchers can read this book with pleasure and great benefit. It presents a comprehensive collection of data and practical examples manifested in about 100 graphs, 80 schemes of processes and devices, a manifold of images showing the microstructure of alloys or details of components and several phase diagrams. Tables containing data on commercially available coatings, alloys, compositions of corrosive salts, function of constituents of coatings add further important pieces of information. Thus, this book is a valuable source of information for anyone engaged in work with or research on high temperature coatings.
Among the very few techniques to localize hydrogen (H) at the microscale in steels, Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was proven to be a reliable tool. The necessity to detect hydrogen stems from its deleterious effects in metals, that are often used as structural components and to obtain better understanding of the underlying metallurgical mechanisms of hydrogen embrittlement (HE) which are still unclear.
Austenitic stainless steels are nowadays commonly used in a wide variety of application, from hydrogen transport and storage facilities to petrochemical and offshore applications where they are exposed to aggressive environments and therefore prone to HE. One of the greater risks in the austenitic class is the embrittlement of the material due to the instability of the γ austenite and its transformation into a brittle α martensitic phase. This transformation takes place due to the local stresses that are induced by the uptake of hydrogen during service. Nonetheless, it was shown that this transformation can occur as an artefact during SIMS analysis itself where Cs-sputtering is necessary not only to remove surface contaminations but mainly to enhance H/D secondary ion yield.
In the following contribution we show the influence of different sputtering conditions on AISI 304L austenitic stainless steel in order to distinguish the artefact from the hydrogen induced transformation. The material was charged electrochemically in a deuterium based electrolyte. Deuterium (D) must be in these experiments as a replacement for hydrogen which cannot be used because adsorbed hydrogen superimposes hydrogen originating from charging the sample in the SIMS images. ToF-SIMS analyses were conducted by ToF SIMS IV (IONTOF GmbH, Münster, Germany). The experiments were carried out on deuterium charged and non-charged samples. The structural characterization was carried out by SEM and EBSD examinations before and after charging, both with a Leo Gemeni 1530VP field-emission scanning electron microscope and a Zeiss Supra 40 instrument (Carl Zeiss Microscopy GmbH, Oberkochen, Germany). The results showed that the use of 1keV Cs+ beam induces stacking faults while higher sputter beam energies results in γ→α transformation.
Virtual-lab-based determination of a macroscopic yield function for additively manufactured parts
(2018)
This work presents a method for the yield function determination of additively manufactured parts of S316L steel. A crystal plasticity model is calibrated with test results and used afterwards to perform so-called virtual experiments, that account for the specific process-related microstructure including crystallographic and morphological textures. These simulations are undertaken on a representative volume element (RVE), that is generated from EBSD/CT-Scans on in-house additively manufactured specimen, considering grain structure and crystal orientations. The results of the virtual experiments are used to determine an anisotropic Barlat yield function, that can be used in a macroscopical continuum-sense afterwards. This scale-bridging approach enables the calculation of large-scale parts, that would be numerically too expensive to be simulated by a crystal plasticity model.
Common air-coupled transducers for non-destructive testing consist of a piezocomposite material and several matching layers. Better acoustical matching to air is achieved by transducers based on charged cellular polypropylene (PP). This material has about hundred times lower acoustic impedance than any piezocomposite, having about the same piezoelectric coefficient. The piezoelectric properties of cellular PP are caused by the polarization of air cells. Alternatively, a ferroelectret receiver can be understood as a capacitive microphone with internal polarization creating permanent internal voltage. The sensitivity of the receiver can be increased by applying additional bias voltage. We present an ultrasonic receiver based on cellular PP including a high-voltage module providing bias voltage up to 2 kV. The application of bias voltage increased the signal by 12 to 15 dB with only 1 dB increase of the noise.
This receiver was combined with a cellular PP transmitter in through transmission to inspect several test specimens consisting of glass-fiber-reinforced polymer face sheets and a porous closed-cell PVC core. These test specimens were inspected before and after load. Fatigue cracks in the porous PVC core and some fatigue damage in the face sheets were detected. These test specimens were originally developed to emulate a rotor blade segment of a wind power plant. Similar composite materials are used in lightweight aircrafts for the general aviation. The other inspected test specimen was a composite consisted of glass-fiber-reinforced polymer face sheets and a wooden core. The structure of the wooden core could be detected only with cellular PP transducers, while commercial air-coupled transducers lacked the necessary sensitivity. Measured on a 4-mm thick carbon-fiber-reinforced polymer plate, cellular PP transducers with additional bias voltage achieved a 32 dB higher signal-to-noise ratio than commercial air-coupled transducers.
Common air-coupled transducers for non-destructive testing consist of a piezocomposite material and several matching layers. Better acoustical matching to air is achieved by transducers based on charged cellular polypropylene (PP). This material has about hundred times lower acoustic impedance than any piezocomposite, having about the same piezoelectric coefficient. The piezoelectric properties of cellular PP are caused by the polarization of air cells. Alternatively, a ferroelectret receiver can be understood as a capacitive microphone with internal polarization creating permanent internal voltage. The sensitivity of the receiver can be increased by applying additional bias voltage. We present an ultrasonic receiver based on cellular PP including a high-voltage module providing bias voltage up to 2 kV. The application of bias voltage increased the signal by 12 to 15 dB with only 1 dB increase of the noise.
This receiver was combined with a cellular PP transmitter in through transmission to inspect several test specimens consisting of glass-fiber-reinforced polymer face sheets and a porous closed-cell PVC core. These test specimens were inspected before and after load. Fatigue cracks in the porous PVC core and some fatigue damage in the face sheets were detected. These test specimens were originally developed to emulate a rotor blade segment of a wind power plant. Similar composite materials are used in lightweight aircrafts for the general aviation. The other inspected test specimen was a composite consisted of glass-fiber-reinforced polymer face sheets and a wooden core. The structure of the wooden core could be detected only with cellular PP transducers, while commercial air-coupled transducers lacked the necessary sensitivity. Measured on a 4-mm thick carbon-fiber-reinforced polymer plate, cellular PP transducers with additional bias voltage achieved a 32 dB higher signal-to-noise ratio than commercial air-coupled transducers.
Carbon Capture and Storage (CCS) is well acknowledged to mitigate climate change. Therefore, pipe Steels suitable for CCS technology require resistance against the corrosive environment of a potential CCS-site, e.g. heat, pressure, salinity of the aquifer, CO2-partial pressure. Samples of different mild and high alloyed stainless injection-pipe Steels partially heat treated: 42CrMo4, X20Cr13, X46Cr13, X35CrMo4 as well as X5CrNiCuNb16-4 were kept at T=60 °C and ambient pressure as well as p=100 bar for 700 h - 8000 h in a CO2-saturated synthetic aquifer environment similar to possible geological on-shore CCS-sites in the northern German Basin. Main corrosion products analysed on pits are FeCO3 and FeOOH. The carbon content does not show significant influence on the pitting behaviour. Generally, higher chromium Content results in better corrosion resistance. Although X35CrMo17-1 and X5CrNiCuNb16-4 show low surface corrosion rates, their resistance against local corrosion in CCS environment is not significantly better compared to the much less costly Steels X20Cr13 and X46Cr13.
A femto-second pulsed laser ablation in liquid (PLAL) procedure for the generation of titanium oxide nanoparticles (NP) is reported with the purpose of understanding morphology and structure of the newly generated NPs. Ablation duration was varied for optimization of NP generation processes between 10 and 90 min. Surface morphology of NPs as well as their size and shape (distribution) were analysed by various complementary electron microscopy techniques, i.e. SEM, TSEM and TEM. The crystalline structure of titanium oxide particles was investigated by XRD and HR-TEM. Concentration of generated titanium oxide NPs in liquid was analysed by ICP-MS. A mix of crystalline (mainly anatase), partly crystalline and amorphous spherical titanium oxide NPs can be reported having a mean size between 10 and 20 nm, which is rather independent of the laser ablation (LA) duration. A second component consisting of irregularly shaped, but crystalline titanium oxide nanostructures is co-generated in the LA water, with more pronounced occurrence at longer LA times. The provenance of this component is assigned to those spherical particles generated in suspension and passing through the converging laser beam, being hence subject to secondary irradiation effects, e. g. fragmentation.
Glass powders are promising candidates for manufacturing a broad diversity of sintered materials like sintered glass-ceramics, glass matrix composites or glass bonded ceramics with properties and complex shape. Powder processing, however, can substantially affect sinterability, e.g. by promoting surface crystallization. On the other hand, densification can be hindered by gas bubble formation for slow crystallizing glass powders. Against this background, we studied sintering and foaming of silicate glass powders with different crystallization tendency for wet milling and dry milling in air, Ar, N2, and CO2 by means of heating microscopy, DTA, Vacuum Hot Extraction (VHE), SEM, IR spectroscopy, XPS, and ToF-SIMS. In any case, foaming activity increased significantly with progressive milling. For moderately milled glass powders, subsequent storage in air could also promote foaming. Contrarily, foaming could be substantially reduced by milling in water and 10 wt% HCl. Although all powder compacts were uniaxially pressed and sintered in air, foaming was significantly affected by different milling atmosphere and was found most pronounced for milling in CO2 atmosphere. Conformingly, VHE studies revealed that foaming is mainly driven by carbonaceous species, even for powders milled in other gases. Current results of this study thus indicate that foaming is caused by carbonaceous species trapped on the glass powder surface.
With the introduction of a mass transport mechanism the entire problem is subjected to a time frame that dictates the time-dependent action of soluted species on mechanical properties. A numerical framework within the phase-field approach is presented with an embrittlement-based coupling mechanism. The underlying functionals are expressed in terms of the displacement, mass concentration and crack phase-field. Within the phase-field approach the modelling of sharp crack discontinuities is replaced by a diffusive crack model facilitating crack initiation and complex crack topologies without the requirement of a predefined crack path. The isotropic hardening of the elasto-plastic deformation model and the local fracture criterion are affected by the species concentration. This allows for embrittlement and leads to an accelerated crack propagation. An extended mass transport equation for hydrogen embrittlement, accounting for mechanical stresses and deformations, is implemented. For stabilisation purposes a staggered scheme is applied to solve the system of partial differential equations by a multi-field finite-element method. A thermodynamically consistent coupling relation that accommodates the required mechanisms is presented.
Biomaterials for bone replacement and grafting should possess sufficient strength, be bioresorbable and demonstrate osteoconductivity/osteoinductivity. Nowadays, hydroxyapatite (HA) and tricalcium phosphate (TCP) are the most widespread ceramics for bone grafting at the market, however, their resorption is reported, in some cases, to be not enough. This is why the search for more soluble ceramics compared to HA and TCP looks rather viable.
A possible way to increase ceramics solubility leads to partial substitution of Ca2+-ions in Ca3(PO4)2 by alkali castions, like Na+ or/and K+. Improvement of solubility stems from decreasing lattice energy of a substituted phase, as well as increase in hydration energy of the ions releasing from the phase to ambient solution. From this viewpoint, bioceramics based on compositions from Ca3(PO4)2 - CaKPO4 - CaNaPO4 ternary system seems to be prospective for bone replacement and grafting in sense of resorption properties. At the same time, one should bear in mind that solubility level (resorbability) is governed not only by reduction of lattice energy, but also by microstructure features. Grain sizes and porosity contribute much to dissolution rate making study of sintering of aforementioned ceramics highly important.
In powder-based Additive Manufacturing (AM) processes, an object is produced by successively depositing thin layers of a powder material and by inscribing the cross section of the object in each layer. The main methods to inscribe a layer are by binder jetting (also known as powder 3D printing) or by selective laser sintering/melting (SLS/SLM).
Powder-based AM processes have found wide application for several metallic, polymeric and also ceramic materials, due to their advantages in combining flexibility, easy upscaling and (often) good material properties of their products.
The deposition of homogeneous layers is key to the reproducibility of these processes and has a direct influence on the quality of the final parts. Accordingly, powder properties such as particle size distribution, shape, roughness and process related properties such as powder flowability and packing density need to be carefully evaluated.
Due to these requirements, these processes have been so far precluded to find commercial use for certain applications. In the following, two outstanding cases will be presented.
A first example is that powder-based AM processes are widely used for many metallic and polymeric materials, but they find no commercial application for most technical ceramics.
This seemingly contradicting observation is explained by the fact that in powder based AM, a dry flowable powder needs to be used. The processing of technical ceramics in fact typically requires very fine and poorly flowable powder, which makes them not suitable for the standard processes. There have been several approaches to adapt the raw materials to the process (e.g. by granulation), but in order to maintain the superior properties of technical ceramics it seems necessary to follow the opposite approach and adapt the process to the raw materials instead.
This was the motivation for developing the Layerwise Slurry Deposition (LSD), an innovative process for the deposition of powder layers with a high packing density. In the LSD process, a ceramic slurry is deposited to form thin powder layers, rather than using a dry powder. This allows achieving high packing density (55-60%) in the layers after drying. It is also important, that standard ceramic raw materials can be used. When coupled with a printing head or with a laser source, the LSD enables novel AM technologies which are similar to 3D printing or selective laser sintering, but taking advantage of having a highly dense powder bed.
The LSD -3D printing, in particular, offers the potential of producing large (> 100 mm) and high quality ceramic parts, with microstructure and properties similar to traditional processing. Moreover, due to the compact powder bed, no support structures are required for fixation of the part in the printing process.
Figure 1 shows the schematics of the working principle of the LSD-3D print and illustrates some examples of the resolution and features achievable.
The second outstanding case here described is the application of powder-based AM in environments with reduced or zero gravity. The vision is to be able to produce repair parts, tools and other objects during a space mission, such as on the International Space Station (ISS), without the need of delivering such parts from Earth or carrying them during the mission. AM technologies are also envisioned to play an important role even for future missions to bring mankind to colonize other planets, be it on Mars or on the Moon. In this situation, reduced gravity is also experienced (the gravitational acceleration is 0.16 g on the Moon and 0.38 g on Mars).
These environments cause the use of AM powder technologies to be very problematic: the powder layers need to be stabilized in order to avoid dispersion of the particles in the chamber. This is impossible for standard AM powder deposition systems, which rely on gravitation to spread the powder.
Also in this case, an innovative approach has been implemented to face this technological challenge. The application of a gas flow through a powder has a very strong effect on its flowability, by generating a force on each particle, which is following the gas flow field. This principle can be applied in a simple setup such as the one shown in Figure 2.
In this setup, the gas flow causes an average pressure on the powder bed in direction of the arrows, generating a stabilizing effect which acts in the same direction of the gravitational force. This effect can be used in addition to normal gravity on Earth to achieve a better stabilization of 3D printed parts in the powder bed. In this case, even a significant increase of packing density of the powder was measured, compared to the same experimental setup without gas flow. This is due to the fact that the force on each single particle follows the gas flow field, which is guiding the particles to settle between the pores of the powder bed, thus achieving an efficient packing.
The same principle can be applied in absence of gravitation, where the gas flow acts to stabilize the powder layers. It has been shown that ceramic powder could be deposited in layers and laser sintered in µ-gravity conditions during a DLR (Deutsches Zentrum für Luft- und Raumfahrt) campaign of parabolic flights, as shown in Figure 2. A follow-up campaign is dedicated to the deposition of metallic (stainless steel) powder in inert atmosphere and to study the effects of laser melting in µ-gravity.
In conclusion, the description of these two example cases shows how the development of novel technological processes can address some of the limitations of standard powder-based AM, in order to enable the use of new materials, such as technical ceramics, or to tackle the challenges of AM in space.
Powder bed -based technologies are amongst the most successful Additive Manufacturing (AM) techniques. "Selective laser sintering/melting" (SLS/SLM) and "binder jetting 3D printing" (3DP) especially are leading AM technologies for metals and polymers, thanks to their high productivity and scalability. In this context, the "layerwise slurry deposition" (LSD) has been developed as a layer deposition method which enables the use of SLS/SLM and 3DP technologies for advanced ceramic materials. LSD consists in the layer-by-layer deposition of a ceramic slurry by means of a doctor blade. Each layer is deposited and dried to achieve a highly packed powder layer, which can be used for SLM or for 3DP. This technique offers high flexibility in the ceramic feedstock used, especially concerning material and particle size, and is capable of producing parts with physical and mechanical properties comparable to traditionally shaped parts. In this presentation, the LSD technique will be introduced and several examples of application to porcelain, SiC and alumina products will be reported.
Carbon Capture and Storage (CCS) is identified as an excellent technology to reach the target of CO2 reduction. However, the safety issue and cost effectiveness hinder the future of CCS. For the reliability and safety issues of injection wells the corrosion resistance of the materials used needs to be determined.
In this study, representative low cost materials including carbon steel 1.8977 and low alloyed steel 1.7225 were embedded in cement to mimic the realistic casing-cement interface. Electrochemical studies were carried out using these metal-cement specimens in comparison with those made of metal only in CO2 saturated synthetic aquifer fluid, at 333 K, to reveal the effect of cement on the steel performance. The results showed the protective effect of cement on the performance of pipeline metals during polarisation process. However, the corrosion current density was high in all cases, with and without cement, indicating that the corrosion resistance of these materials is low. This conclusion was supported by the surface analysis of the polarized specimens, which revealed both homogenous and pitting corrosions.
Carbon Capture and Storage (CCS) is identified as an excellent technology to reach the target of CO2 reduction. However, the safety issue and cost effectiveness hinder the future of CCS. For the reliability and safety issues of injection wells the corrosion resistance of the materials used needs to be determined.
In this study, representative low cost materials including carbon steel 1.8977 and low alloyed steel 1.7225 were embedded in cement to mimic the realistic casing-cement interface. Electrochemical studies were carried out using these metal-cement specimens in comparison with those made of metal only in CO2 saturated synthetic aquifer fluid, at 333 K, to reveal the effect of cement on the steel performance. The results showed the protective effect of cement on the performance of pipeline metals during polarisation process. However, the corrosion current density was high in all cases, with and without cement, indicating that the corrosion resistance of these materials is low. This conclusion was supported by the surface analysis of the polarized specimens, which revealed both homogenous and pitting corrosions. Furthermore, to reveal the possible protective performance of FeCO3, the pipeline steels were pre-carbonated and then tested in the same condition as freshly polished specimens.
Entwickelt wurde eine mehrstufige Fertigungstechnologie (Schruppen, Schlichten, Trennschnitt) zur Herstellung keramischer Federn aus gesinterten Hohlzylindern. Durch Optimierung von Maschinenparametern, Schleifscheiben sowie Werkstück- und Werkzeugaufnahmen ist es gelungen, Federn aus Hochleistungskeramik (Aluminiumoxid und Zirkonoxid) mit hoher Kanten- und Oberflächenqualität reproduzierbar herzustellen. Eine hohe Variabilität bezüglich Außen- und Innendurchmesser, Steigung, Windungsquerschnitt und Abstand zwischen den Windungen ermöglicht es, die Federkonstante über drei Größenordnungen zu variieren.
Untersucht wurden Federstabilität und Spannungs-Dehnungs-Verhalten unter konstanter und zyklischer Druckbelastung sowie die thermomechanische Stabilität der Keramikfedern. Aluminiumoxid-Federn können bis etwa 800°C, Zirkonoxid-Federn bis etwa 600°C ohne bleibende geometrische Verformung eingesetzt werden.
Unter konstanter Spannung zeigen Federn aus Y-stabilisiertem TZP (Zirkonoxid)-Werkstoffen, von anderen Keramikwerkstoffen abweichend, bei Raumtemperatur eine zeitabhängige, elastische, Verformung (Superelastizität), die nach Entlastung über einen Zeitraum von mehreren Stunden reversibel verläuft. Als Ursache wird eine spannungsinduzierte reversible Phasenumwandlung zwischen austenitischer (tetragonales ZrO2) und martensitischer (monoklines ZrO2) Phase postuliert.
Diskutiert wird das Anwendungspotenzial der entwickelten Federn für kapazitive keramische Federsensoren für Gravimeter und Wägetechnik.
The fundamental impact of sulfur and water on corrosion rates and potential failure of the exposed material is well known. However, the access to the related corrosion mechanism causing material degradation is often a problem to solve. This study investigates the effect of SO2 and water vapor in the initial stages of corrosion of an Fe9Cr0.5Mn model alloy at 650 °C in situ. The analysis was carried out under laboratory conditions using energy-dispersive X-ray diffraction (EDXRD).
The influence of heat treatment and creep loading on the microstructure of an Al-Cu-Li alloy was investigated. Especially the formation of different precipitates (T1 and Theta') were characterized and the microstructural changes under different ageing conditions (with and without external strain) were investigated to determine the effect od stress on the ageing process.
The influence of heat treatment and creep loading on the microstructure of an Al-Cu-Li alloy was investigated. Especially the formation of different precipitates (T1 and Theta') were characterized and the microstructural changes under different ageing conditions (with and without external strain) were investigated to determine the effect od stress on the ageing process.
High-performance composites, including glass-fiber reinforced plastic (GFRP) materials, are favored as a construction material for wind turbine rotor blades due to their high specific strength and stiffness properties. During the manufacturing process, however, imperfections are often introduced, then further propagated due to harsh environmental conditions and a variety of loads. This leads to failure significantly before their projected 20-year lifespan. As replacement of entire blades can be a costly potential outcome, localized repair of the damaged region to restore structural integrity and thus lengthen its lifespan has become an important issue in recent years. Rotor blades are often repaired using a common technique for composite laminates: adhesively bonded structural repair patches. These methods involve replacing the lost load path with a new material that is joined to the parent structure, and include scarf or plug repairs. However, there currently do not exist any standardized repair procedures for wind turbine rotor blades, as comparisons of blade properties repaired with the existing methods have not been studied in depth. Namely, there is a lack of understanding about the effects of various repair methods on the fatigue life of the shells of rotor blades. This study therefore aims to begin to fill this knowledge gap by testing the influence of different repair patches on the blades’ mechanical properties. Manufactured with the vacuum-assisted resin infusion process, the test specimens are produced as a curved structure with GFRP sandwiching a polyvinyl chloride foam core to best represent a portion of a rotor blade shell. Scarf repairs are then introduced with varying layup techniques, and material properties are examined with cyclical fatigue tests. Crack growth and development is monitored during fatigue testing by various non-destructive testing methods, including passive thermography with an infrared camera system, and a 3D deformation analysis system with ARAMIS. Large deformation fields and detection of in- and out-of-plane deformations is thus possible in-situ. The mechanical behavior and development of defects in the various repaired specimens is compared to each other as well as to reference test specimens with no repair patches. In-situ test data is combined with further non-destructive testing methods, including laminography, and active thermography, to develop a robust understanding of the effects of repair concepts.
Effects of various geometrical and physical factors, as well as the method of data reduction (analysis of
experimental forceedisplacement curves) on the values of local interfacial strength parameters (local IFSS, td, and critical energy release rate, Gic) determined by means of a single fiber pull-out test are discussed. Experimental results of our pull-out tests on several fiberepolymer matrix systems showed that td and Gic weakly depended on geometrical factors. However, the pull-out test appeared to be sensitive to the conditions of specimen formation and testing, such as changing the nature of the contacting surfaces (fiber sizing) and the fiber pull-out rate. Of several methods of td and Gic Determination from a forceedisplacement curve, the most reliable and reproducible one is the approach based on the values of the maximum force recorded in a pull-out test and the interfacial frictional force immediately after fiber debonding.
Der Vortrag zeigt zwei Möglichkeiten zur Verbesserung der VSSA-Screening-Methode zur Identifizierung von Nanopulvern auf. Bisher ist das Verfahren nur für monodisperse Partikel mit idealer Kugelform valide. Die Verteilungsbreite der Partikelgröße soll durch die Nutzung des Modells einer logarithmischen Normalverteilung implementiert werden. Die Abweichung der gemessenen Partikel von einer idealen Kugel in Sphärizität, Rundheit und Rauigkeit sind über einen Morphologiefaktor MF zu berücksichtigen. An einem konkreten Beispiel werden Auswirkungen der Implementierungen rechnerisch dargestellt und mit dem bisherigen Verfahren verglichen.
Materials subjected to high-temperature service conditions will change their microstructure with time. Associated with this aging process is a change of mechanical properties as well as a change of damage mechanisms. Within the scope of the FVV project Aging and Lifetime, Fraunhofer IWM in Freiburg and BAM in Berlin (both Germany) experimentally characterized the widespread high-temperature aluminum alloy EN AW-2618A in different overaging states. Based on the experimental findings, models for numerical lifetime assessment with the finite-element method were implemented.
Werkstoffe im Hochtemperatureinsatz verändern mit der Zeit ihre Mikrostruktur. Mit diesem Alterungsprozess einher geht eine Veränderung der mechanischen Eigenschaften ebenso wie eine Veränderung des Schädigungsverhaltens. Im Rahmen des FVV Vorhabens „Alterung und Lebensdauer“ haben das Fraunhofer IWM in Freiburg und die BAM in Berlin die weit verbreitete warmfeste Aluminiumlegierung EN AW-2618A in verschiedenen Alterungszuständen experimentell charakterisiert und darauf aufbauend Modelle für die Lebensdauerbewertung mit der Finite-Elemente- Methode implementiert.
Ni-base superalloy single crystals have been used in turbine blades for hot sections of gas turbines for over four decades. In order to increase the efficiency of the turbines, a continuous increase in the inlet temperature of combustion gases into the turbine has driven the design of turbine blades to complicated shapes and the presence of a complex pattern of cooling channels. These three-dimensional shapes, together with the inhomogeneous distribution of stresses along the blade, induce an also complicated triaxial stress state, which does not compare to uniaxial tests that are performed to characterize high temperature properties such as creep. A round notch on a test piece represents a simple configuration that generates a quasi-isostatic stress state across the notch. In the present contribution, the effect of a sharp round notch on the microstructural micromechanisms within the notched region cylindrical bars, loaded along [001] at 1020 °C and 160 MPa net stress, is studied. To this end, a series of interrupted creep tests is conducted on plain and notched bars and the microstructure is compared. Results are discussed in terms of degree microstructural coarsening, and dislocation activity. The effect of notch generation via grinding is also discussed in these terms. The presence of carbides evolving in from residual carbon is also shown and discussed. .Funding by the German Research Association (DFG) [grant number AG 191/1] is acknowledge
Due to their excellent combination of ductility, strength and corrosive resistance, austenitic stainless steels (ASS) are widely used in many industrial applications. Thus, these steel grades can be found as structural components in the (petro-)chemical industry, in offshore applications and more recent for storage and transport of hydrogen fuel. Steels employed for these applications are exposed to aggressive environments and hydrogen containing media. The ingress and accumulation of hydrogen into the microstructure is commonly observed during service leading to a phenomenon called “hydrogen embrittlement”. A loss in ductility and strength, the formation of cracks and phase transformations are typical features of this hydrogen-induced degradation of mechanical properties.
Although, great efforts are made to understanding hydrogen embrittlement, there is an ongoing debate of the underlying mechanisms. This knowledge is crucial for the safe use and durability of components on the one side and the development of new materials on the other.
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was proven to be a powerful tool for depicting the distribution of the hydrogen isotope deuterium in the microstructure of austenitic and duplex steels. The combination with imaging techniques such as electron backscatter diffraction (EBSD) and scanning electron microscopy (SEM), delivering structural and morphological information, creates a comprehensive picture of the hydrogen/deuterium-induced effects in the materials. All the gathered data is treated with principal component analysis (PCA) and data fusion to enhance the depth of information.
The mobility of hydrogen and deuterium in a steel microstructure is affected by external mechanical stress. To investigate the behaviour of deuterium in a strained microstructure, a new in situ experimental approach was developed. This gives the possibility of analysing samples in the SIMS instrument simultaneously to four-point-bending-tests.
Specimens made from ASS AISI 304L were electrochemically charged with deuterium instead of hydrogen. This necessity stems from the difficulty to separate between artificially charged hydrogen and hydrogen existing in the pristine material or adsorbed from the rest gas in the analysis chamber. Nonetheless, similar diffusion, permeation and solubility data allow to draw qualitative conclusions from the experiments, which are relevant for the application addressed.
Hochleistungsverbundwerkstoffe, bzw. Glasfaser-Kunststoff-Verbunde (GFK), haben sich als Leichtbauwerkstoffe für Leichtflugzeuge und Rotorblätter von Windkraftanlagen etabliert. Die hohe spezifische Festigkeit und Steifigkeit qualifizieren sie besonders für diese Anwendung. Während der Fertigung werden Imperfektionen häufig in die Blattschalen eingebracht. Durch Witterungseinflüsse kommt es zum Schadensfortschritt. Infolgedessen treten Schäden in der Blattschale, die den sicheren Betrieb gefährden können, weit vor der projektierten Lebensdauer von 20 Jahren auf. Da der Austausch von ganzen Blättern sehr kostintensiv ist, ist eine lokale Reparatur des geschädigten Bereichs zur Wiederherstellung der strukturellen Integrität, viel preisgünstiger. Die Reparatur von Rotorblättern ist in den letzten Jahren zu einem wichtigen Thema geworden. Derzeit werden verschiedenste Reparaturkonzepte angewendet. Eine einheitliche Reparaturvorgabe gibt es bisher nicht. Die Auswirkungen der angewendeten Reparaturkonzepte auf die Betriebsfestigkeit der Reparaturstelle sind weitestgehend unbekannt und sollen deshalb in diesem Projekt untersucht werden. Gekrümmte Voll-Laminat sowie Sandwich Prüfkörper werden mit dem Vacuum-Assisted-Resin-Infusion-Prozess (VARI) produziert. Um einen Teil einer Rotorblattschale darzustellen, sind sie als GFK aufgebaut, beziehungsweise die Sandwich Strukturen mit einem Polyvinylchlorid-Schaumkern (PVC) Kern, wie im Original. Schalenreparaturen in verschiedenen Layup-Techniken und Geometrie werden eingebracht und die Materialeigenschaften mit zyklischen Ermüdungstests untersucht. Im Projekt werden ideal im Labor erzeugte Reparaturstellen mit in der Praxis angewendeten Ausführungstechniken eines Industriepartners experimentell verglichen. Für die in-situ Detektion der Schadensentwicklung während des Ermüdungsversuches kommt ein kombiniertes Felddehnungs- und Thermografie-Kamerasystem zum Einsatz. Das mechanische Verhalten und die Schadensentwicklung in den verschiedenen reparierten Prüfkörper wird miteinander sowie mit den Referenzproben ohne Reparaturstellen verglichen. Zudem wird in numerischen Modellen für die verschiedenen Reparaturtechniken eine Spannungsanalyse durchgeführt um hinsichtlich der Betriebsbeanspruchung eine Bewertung angeben zu können.
The creep behavior of single-crystals of the nickel-base superalloy CMSX-4 was investigated at 1288°C, which is the temperature of the hot isostatic pressing (HIP) treatment applied to this superalloy in the industry. It was found that at this super-solvus temperature, where no Gamma’-strengthening occurs, the superalloy is very soft and rapidly deforms under stresses between 4 and 16 MPa. The creep resistance was found to be very anisotropic, e.g. the creep rate of [001] crystals was about 11 times higher than that of a [111] crystal. The specimens of different orientations also showed a very different necking behavior. The reduction of the cross-section area psi of [001] crystals reached nearly 100%, while for a [111] crystal psi=62%. The EBSD analysis of deformed specimens showed that despite such a large local strain the [001] crystals didn’t not recrystallize, while a less deformed [111] crystal totally recrystallized within the necking zone. From the shape of deformed specimens and TEM investigations it was concluded that the main strain contribution resulted from <011> {111} octahedral slip.
Additive Manufacturing (AM) through the Selective Laser Melting (SLM) route offers ample scope for producing geometrically complex parts compared to the conventional subtractive manufacturing strategies. Nevertheless, the residual stresses which develop during the fabrication can limit application of the SLM components by reducing the load bearing capacity and by inducing unwanted distortion, depending on the boundary conditions specified during manufacturing. The present study aims at characterizing the residual stress states in the SLM parts using different diffraction methods. The material used is the nickel based superalloy Inconel 718. Microstructure as well as the surface and bulk residual stresses were characterized.
For the residual stress analysis, X-ray, synchrotron and neutron diffraction methods were used. The measurements were performed at BAM, at the EDDI beamline of -BESSY II synchrotronand the E3 line -BER II neutron reactor- of the Helmholtz-Zentrum für Materialien und Energie (HZB) Berlin. The results reveal significant differences in the residual stress states for the different characterization techniques employed, which indicates the dependence of the residual state on the penetration depth in the sample. For the surface residual stresses, longitudinal and transverse stress components from X-ray and synchrotron agree well and the obtained values were around the yield strength of the material. Furthermore, synchrotron mapping disclosed gradients along the width and length of the sample for the longitudinal and transverse stress components. On the other hand, lower residual stresses were found in the bulk of the material measured using neutron diffraction. The longitudinal component was tensile and decreased towards the boundary of the sample. In contrast, the normal component was nearly constant and compressive in nature. The transversal component was almost negligible. The results indicate that a stress re-distribution takes place during the deposition of the consecutive layers. Further investigations are planned to study the phenomenon in detail.
A femto-second pulsed laser ablation in liquid (PLAL) procedure for the generation of titanium oxide nanoparticles (NP) is reported with the purpose of understanding morphology and structure of the newly generated NPs. Ablation duration was varied for optimization of NP generation processes between 10 and 90 min. Surface morphology of NPs as well as their size and shape (distribution) were analysed by various complementary electron microscopy techniques, i.e. SEM, TSEM and TEM. The crystalline structure of titanium oxide particles was investigated by XRD(two instruments operated in different geometries) and HR-TEM. Concentration of generated titanium oxide NPs in liquid was analysed by ICP-MS. A mix of crystalline (mainly anatase), partly crystalline and amorphous spherical titanium oxide NPs can be reported having a mean size between 10 and 20 nm, which is rather independent of the laser ablation (LA) duration. A second component consisting of irregularly shaped, but crystalline titanium oxide nanostructures is co-generated in the LA water, with more pronounced occurrence at longer LA times. The provenance of this component is assigned to those spherical particles generated in suspension and passing through the converging laser beam, being hence subject to secondary irradiation effects, e. g. fragmentation.
A numerical pre-study has shown that cracks in a flat sample featuring a drilled hole can be classified into one of three crack shape classes based on the combined evaluation of various types of test data.
Efficient energy provision using fuel cells requires effective hydrogen storage capacities. Glass is a material of low intrinsic hydrogen permeability and is therefore a promising material for hydrogen storage containers or diffusion barriers. Pioneer work on oxidic glasses seems to indicate a correlation between glass composition and hydrogen permeation, which was mainly derived from the behavior of silica glass. In this study, we focus on the relationship between topologic (free volume; network polymerization) and thermodynamic (configurational entropy) glass parameters. Experiments were performed well below the glass transition temperature, which excludes significant structural relaxation and chemical dissolution of hydrogen. The compositional dependence of seven glasses on the SiO2-NaAlO2 join pointed out that in fully polymerized glasses the H2 permeability cannot be solely derived from the total free volume of the glass structure. Hence, evidence is provided that the size distribution of free volume contributes to hydrogen diffusion and solubility. Additionally, results indicate that hydrogen permeability of the glasses is affected by the configurational heat capacity ΔCp at Tg.