5 Werkstofftechnik
Filtern
Dokumenttyp
- Zeitschriftenartikel (418) (entfernen)
Sprache
- Englisch (405)
- Deutsch (6)
- Mehrsprachig (5)
- Französisch (1)
- Russisch (1)
Schlagworte
- Additive manufacturing (27)
- Corrosion (20)
- Additive Manufacturing (17)
- EBSD (17)
- Microstructure (15)
- Creep (13)
- Transmission electron microscopy (13)
- Residual stress (12)
- Glass (11)
- Steel (11)
- Crystallization (9)
- Sintering (8)
- Aging (7)
- Fatigue (7)
- High entropy alloy (7)
- Mechanical properties (7)
- CCS (6)
- Carbon steel (6)
- Electron microscopy (6)
- High temperature corrosion (6)
- Ontology (6)
- SEM (6)
- X-ray diffraction (6)
- 3D printing (5)
- Bioactive glass (5)
- CALPHAD (5)
- Ceramics (5)
- Degradation (5)
- High entropy alloys (5)
- Laser powder bed fusion (5)
- Metallic glasses (5)
- Nanoparticles (5)
- Neutron diffraction (5)
- Oxidation (5)
- Plasticity (5)
- Alumina (4)
- Ceramic (4)
- EXAFS (4)
- Electron backscatter diffraction (4)
- Fracture (4)
- HIP (4)
- Heat treatment (4)
- High alloyed steel (4)
- Impurities (4)
- Kikuchi patterns (4)
- Lattice parameters (4)
- Martensite (4)
- Metallic glass (4)
- Molecular dynamics (4)
- Nanoindentation (4)
- Pattern matching (4)
- Plastic deformation (4)
- Raman spectroscopy (4)
- Scanning electron microscopy (4)
- Single crystal (4)
- Vickers indentation (4)
- Zirconia (4)
- 3D-Printing (3)
- 3D-printing (3)
- AISI 316L (3)
- Binder Jetting (3)
- Calcination (3)
- Carbon fibres (3)
- Corrosion Fatigue (3)
- Corrosion fatigue (3)
- Coulomb explosion (3)
- Crack propagation (3)
- Crystal plasticity (3)
- Damage (3)
- Diffusion (3)
- Dislocation (3)
- Environmental stress cracking (ESC) (3)
- Finite element analysis (3)
- Fracture mechanics (3)
- Fracture toughness (3)
- Full notch creep test (FNCT) (3)
- General Materials Science (3)
- Glass transition (3)
- Grain boundary (3)
- Inconel 718 (3)
- Interfacial strength (3)
- Iron (3)
- Kikuchi diffraction (3)
- Laser scanning microscopy (LSM) (3)
- Mechanical Engineering (3)
- Mechanics of Materials (3)
- NMR spectroscopy (3)
- Nickel-based superalloys (3)
- Permeability (3)
- Phase-field (3)
- Phase-field simulation (3)
- Pitting (3)
- Reproducibility (3)
- Self-healing (3)
- Shape-memory alloys (3)
- Stress intensity factor (3)
- Stress relaxation (3)
- Superalloy (3)
- TEM (3)
- Thermal expansion (3)
- Ti-6Al-4V (3)
- Viscosity (3)
- X-ray refraction (3)
- AGIL (2)
- AISI 304L (2)
- Al2O3 (2)
- Alkali zinc borate glasses (2)
- Alloy design (2)
- Aluminosilicate glasses (2)
- Aluminum alloy (2)
- Aluminum alloys (2)
- Aquifer (2)
- Atom probe tomography (2)
- Bacteria (2)
- Binder jetting (2)
- Bioactivity (2)
- Bioceramics (2)
- Bone regeneration (2)
- Bulk metallic glasses (2)
- CCUS (2)
- Calcium cobaltite (2)
- Carbon capture and storage (2)
- Carbon storage (2)
- Characterization (2)
- Chemically complex alloy (2)
- Coating (2)
- Compositionally complex alloys (2)
- Computed Tomography (2)
- Computed tomography (2)
- Condensate (2)
- CrCoNi (2)
- CrMnFeCoNi (2)
- Crack growth (2)
- Crack healing (2)
- Crop protection products (2)
- Crystal orientation (2)
- Debinding (2)
- Deep Learning (2)
- Defects (2)
- Density-based Phase-Field Modelling (2)
- Densty-based Thermodynamics (2)
- Deuterium (2)
- Diopsid (2)
- Ductile iron (2)
- Elastic constants (2)
- Electron beam-induced fragmentation (2)
- Electron diffraction (2)
- Environmental stress cracking (2)
- Environmentally assisted cracking (2)
- Foaming (2)
- Fractography (2)
- Fracture surface energy (2)
- GFRP (2)
- Geothermal (2)
- Glass ceramic (2)
- Glass powder (2)
- Glass-ceramic (2)
- Gold (2)
- Grain boundaries (2)
- Grain boundary engineering (2)
- High Alloyed Steel (2)
- High-density polyethylene (2)
- High-entropy alloy (2)
- High-temperature corrosion (2)
- Hydrogen (2)
- IN718 (2)
- Inconel 625 (2)
- Infrared spectroscopy (2)
- Interfacial shear strength (2)
- Internal friction (2)
- Interphase (2)
- Ionic porosity (2)
- Kikuchi pattern (2)
- Knowledge Graph (2)
- LPBF (2)
- LTCC (2)
- Laser Powder Bed Fusion (2)
- Laser ablation in liquid (2)
- Lattice distortion (2)
- Lattice misfit (2)
- Layerwise Slurry Deposition (2)
- Layerwise slurry deposition (2)
- Lead borate glasses (2)
- Lorenz transmission electron microscopy (2)
- Low cycle fatigue (2)
- Lunar regolith (2)
- Machine Learning (2)
- Mars (2)
- Martensitic transformation (2)
- Mass transport (2)
- Microhardness (2)
- Microstrucrue Design (2)
- Microstructural characterization (2)
- Microstructure Design (2)
- Microstructure and texture (2)
- Microstructure evolution (2)
- Mobility (2)
- Modeling (2)
- Nano-powder (2)
- Native oxide (2)
- Nickel alloys (2)
- Nickel-base superalloys (2)
- Niobium alloying (2)
- Ontologies (2)
- Orientation precision (2)
- Ostwald ripening (2)
- Oxyfuel (2)
- P92 (2)
- Particle morphology (2)
- Phase transformations (2)
- Polyethylene (2)
- Polymer (2)
- Porosity (2)
- Preceramic polymer (2)
- Precipitation (2)
- Pressure-assisted sintering (2)
- Quasicrystal (2)
- Rapid solidification (2)
- Reaction-sintering (2)
- Relaxation (2)
- Roughness (2)
- S-Phase (2)
- SIMS (2)
- Sample preparation (2)
- Selective laser melting (2)
- Shear bands (2)
- Short-range order (2)
- Silicon carbide (2)
- Silicon nanowires (2)
- Single-crystals (2)
- Slow crack growth (SCG) (2)
- Slurry (2)
- Solubility (2)
- Sorption (2)
- Space (2)
- Spray drying (2)
- Steels (2)
- Stress corrosion cracking (2)
- Sulfidation (2)
- Sulphidation (2)
- Superalloys (2)
- Superconducting magnet (2)
- Surface treatments (2)
- Tempered martensite-ferritic steel (2)
- Tensile properties (2)
- Tensile testing (2)
- Texture (2)
- Thermodynamics (2)
- Thermoelectric properties (2)
- Thermography (2)
- Titanium oxide (2)
- ToF-SIMS (2)
- Toughness (2)
- Transmission electron microscopy (TEM) (2)
- Viscous sintering (2)
- Water content (2)
- Water speciation (2)
- Wetting (2)
- X-ray absorption spectroscopy (2)
- X-ray computed tomography (CT) (2)
- 12%Cr steel (1)
- 150 Years (1)
- 2PP (1)
- 316L (1)
- 316L stainless steel (1)
- 3D Druck (1)
- 3D etching (1)
- 3D metallography (1)
- 3D-Metallographie (1)
- 3D-finite element modeling (1)
- 4-Dimensional scanning transmission (1)
- 9-12%Cr steel (1)
- ATZ (1)
- Abrasion (1)
- Accelerated temporal integration (1)
- Accessible (1)
- Acid-leaching (1)
- Additive Fertigung (1)
- Additive manufactured Ni-base superalloys (1)
- Adolf Martens (1)
- Advanced high strength steels (1)
- Advanced wastewater treatment (1)
- Ageing (1)
- Agglomerates (1)
- Aggressive environments (1)
- Al alloys (1)
- Al-Cu alloy (1)
- Al-Cu binary alloy system (1)
- Al-Cu-Li-alloy (1)
- Alcium alkali phosphate (1)
- Alkali aluminosilicate glasses (1)
- Alkali and alkaline earth silicate and borate glass (1)
- Alkali-activated materials (1)
- Alloy (1)
- Alloy Safety (1)
- Alloy microstructure (1)
- Alloys (1)
- Alloys' Safety (1)
- Alpha-tricalcium phosphate (1)
- Alterung (1)
- Alumina coatings (1)
- Alumina toughened zirconia (1)
- Aluminium alloys (1)
- Aluminiumlegierung (1)
- Aluminum Alloy Aging (1)
- Amorphization (1)
- Amorphous silica (1)
- Analytical scanning electron microscopy (1)
- Angle measurement (1)
- Annealing (1)
- Anticorrosion (1)
- Approximant (1)
- Aquifer fluid (1)
- Artificial weathering (1)
- Atomistic Simulation (1)
- Atomistic simulations (1)
- Austenite-to-martensite phase transformation (1)
- Austenitic alloys (1)
- Austenitic steel 316L (1)
- Automated Bragg angle determination (1)
- Automated analysis (1)
- Automated image analysis (1)
- BTEX (1)
- Bacterial attachment (1)
- Batch reactions (1)
- Behmite (1)
- Biaxial strength (1)
- Bimodal distribution (1)
- Binders/binding (1)
- Bio Ceramic (1)
- Bio Ceramics (1)
- Bio active ceramic (1)
- Bio-ceramic engineering (1)
- Bioactive Glass (1)
- Bioactive bone grafting material (1)
- Bioactive glass scaffold (1)
- Biodiesel (1)
- Biogeochemical cycling (1)
- Biogeochemistry (1)
- Biomineralisation (1)
- Biopolymer (1)
- Biosensor (1)
- Biphasic calcium phosphate (1)
- Bitter technique (1)
- Blended learning (1)
- Bond energy (1)
- Bone marrow-derived mesenchymal stem cell (1)
- Borate (1)
- Borosilicate glass (1)
- Bragg angles (1)
- Brass (1)
- Bravais lattice (1)
- Bravais lattices (1)
- Brinell hardness (1)
- Brittle fracture (1)
- Brown-rot fungi (1)
- Brownian motion (1)
- Bruchflächen (1)
- Bubble formation (1)
- Burst (1)
- C. lap-shear (1)
- CALPHAD database analysis (1)
- CCUS, supercritical/dense phase CO2, carbon steels, martensitic steel, superaustenite steel, droplet corrosion (1)
- CFRP (1)
- CKAN (1)
- CO2 (1)
- CO2 pipeline transport (1)
- CO2 quality (1)
- CO2 separation membranes (1)
- Cabon capture and storage (1)
- Calcium Cobaltite (1)
- Calcium alkali orthophosphate materials (1)
- Calculated intrinsic fracture toughness (1)
- Carbide phase NbC (1)
- Carbidic austempered ductile iron (1)
- Carbon Fiber Reinforced Plastics (1)
- Carbon Fibre (1)
- Carbon capture (1)
- Carbon capture storage (1)
- Carbon capture, utilization and storage technology (1)
- Carbon dioxide (1)
- Carbon nanotubes (1)
- Casing (1)
- Cavitation (1)
- Ccs (1)
- CdTe quantum dots (1)
- Cellular substructure (1)
- Cellulose (1)
- Cement (1)
- Cement-based materials (1)
- Ceramic multilayer (1)
- Ceramic multilayers (1)
- Ceramic nano particles (1)
- Ceramics 3D printing (1)
- Cerium oxide (1)
- Chalcogenides (1)
- Characterisation (1)
- Chemo-mechanical coupling (1)
- Chemometrics (1)
- Chrystal orientation (1)
- Classification (1)
- Clay ISRU (1)
- Co-firings (1)
- Co2-Storage (1)
- Cobald based alloy (1)
- Coefficient of thermal expansion (1)
- Composite (1)
- Composite recycling (1)
- Compositionally complex alloy (1)
- Concrete 3D-printing (1)
- Condensed Matter Physics (1)
- Confined catalyst (1)
- Coniophora puteana (1)
- Contact angle (1)
- Contact fatigue (1)
- Contact mechanics (1)
- Cooling rate (1)
- Coordinate measurement machine (1)
- Copper vacancies (1)
- Corrosion costs (1)
- Corrosion mechanism (1)
- Corrosion pits (1)
- Corrosion protection (1)
- Corrosion resistance (1)
- Coûts de la corrosion (1)
- CrN/NbN (1)
- Crack arrest (1)
- Crack evolution (1)
- Crack growth in air (1)
- Crack initiation (1)
- Crack opening displacement (1)
- Crack tip opening displacement (1)
- Cracks (1)
- Craze-crack mechanism (1)
- Craze–crack mechanism (1)
- Creation-relaxation algorithm (1)
- Creep behavior (1)
- Creep mechanisms (1)
- Creep strength (1)
- Creep under thermal cycling (1)
- Creep-fatigue (1)
- Creep-fatigue interaction (1)
- Critical energy release rate (1)
- Cross-sectioning (1)
- Crosslinking (1)
- Cryogenic (1)
- Cryogenic cycling (1)
- Crystal Texture (1)
- Crystal growth (1)
- Crystal growth velocity (1)
- Crystal lattice (1)
- Crystal lattice period (1)
- Crystal morphology (1)
- Crystalline defects (1)
- Crystallographic texture (1)
- Cubical shape (1)
- Cupriavidus metallidurans (1)
- Cuttlefish (1)
- Cyclic softening (1)
- Cyclic steam oxidation (1)
- Cytocompatibility (1)
- D. aging (1)
- D. creep D. viscoelasticity (1)
- DCB (1)
- DCB geometry (1)
- Data Interoperability (1)
- Data Mapping (1)
- Data analysis (1)
- Data infrastructures (1)
- Data mapping (1)
- Data pipeline (1)
- Data processing (1)
- Datenbank (1)
- Debonding (1)
- Defect detection (1)
- Defect population (1)
- Defects engineering (1)
- Deformation (1)
- Deformation mechanisms (1)
- Degradation signatures (1)
- Density-based Model (1)
- Density-based Thermodynamics (1)
- Density-based model (1)
- Dental (1)
- Dentine (1)
- Deposition microstructure (1)
- Design of experiment (1)
- Desorption (1)
- Destabilization (1)
- Dielectric breakdown (1)
- Dielectric properties (1)
- Diesel (1)
- Diesel Fuel (1)
- Differential scanning calorimetry (1)
- Differential scanning calorimetry (DSC) (1)
- Diffraction (1)
- Diffraction Enhanced Imaging (1)
- Diffraction contrast (1)
- Diffusivity (1)
- Digital image correlation (1)
- Digital representations (1)
- Digital workflows (1)
- Digitalization (1)
- Digitalizations (1)
- Dimensional mismatch of crystalline lattice periods (misfit) (1)
- Directional grain growth (1)
- Discrete element method (1)
- Dislocation avalanches (1)
- Disorientation (1)
- Dispersion process (1)
- Distributed fiber optic sensing (1)
- Diversity (1)
- Domain Ontology Development (1)
- Double notched creep specimen (1)
- Dry preparation (1)
- Drywood termite (1)
- Dwell periods (1)
- Dwell times (1)
- Dynamic recrystallization (1)
- EFTEM (1)
- EN AW-2618A (1)
- Early oxidation (1)
- Early stages (1)
- Early sulfidation (1)
- Efficiency (1)
- Elastic energy (1)
- Elastic microstructure (1)
- Elastic modulus (1)
- Elastic properties (1)
- Elasticity (1)
- Electric conductivity (1)
- Electrical insulators (1)
- Electrical resistance (1)
- Electrochemical characterisation (1)
- Electrochemical deposition (1)
- Electrochemical impedance spectroscopy (1)
- Electron back-scattered diffraction (1)
- Electron backscattered diffraction (1)
- Electron beam-induced charging (1)
- Electron energy (1)
- Electron microscopy, transmission (1)
- Electronic (1)
- Enamel (1)
- End of life (1)
- Endothelial progenitor cell (1)
- Endurance Limit (1)
- Energiedisersive Röntgenspektroskopie (1)
- Energy distribution (1)
- Environment (1)
- Environmental Stress Cracking (1)
- Epitaxial films (1)
- Epoxy (1)
- Epoxy Resin (1)
- Epoxy resin (1)
- Equilibrium relaxation (1)
- Eutectic (1)
- Expanding cavity model (1)
- Experimental and numerical techniques (1)
- Explosive welding (1)
- Exposed metal sites (1)
- FAIR (1)
- FAIR Data (1)
- FAIR Data Management (1)
- FAIR principles (1)
- FAIR research data management (1)
- FIB Tomography (1)
- FSDC (1)
- Fabrication (1)
- Faceting (1)
- Facilitated activation (1)
- Failure mechanisms (1)
- Failure rate (1)
- Fatigue Testing (1)
- Fatigue crack propagation stages (1)
- Fatigue damage (1)
- Fatigue performance (1)
- Fatigue striations (1)
- Fatigue testing (1)
- Fe-Mn steels (1)
- Femtosecond laser (1)
- Ferritic steels (1)
- Ferritic–martensitic steel (1)
- Ferrous phosphate hydrate (1)
- Fiber-matrix interface (1)
- Fiber/matrix bond (1)
- Fibre reinforced plastic (1)
- Fibre/matrix bond (1)
- Fibre/matrix bonding (1)
- Filters (1)
- Finite element method (1)
- Finland (1)
- Firing (1)
- First derivative (1)
- Flowability (1)
- Fluoride nanoparticles (1)
- Fluoride phosphate glasses (1)
- Fluorolytic sol−gel (1)
- Four-point bending test (1)
- Fourier series (1)
- Fourier transform infrared spectroscopy (1)
- Fracture surface analysis (1)
- Fracture surfaces (1)
- Fragility (1)
- Fraktographie (1)
- Freeze casting (1)
- Fresnoite (1)
- Friction (1)
- Friction Stir Welding (1)
- Friction stir processing (1)
- Frozen state photopolymerization (1)
- Fuel sorption (1)
- Full Notch Creep Test (1)
- Full notch creep test (1)
- Fullerite (1)
- Functional fatigue (1)
- Fungi (1)
- GD-OES (1)
- GMR (1)
- GMR sensors (1)
- Gas flow assisted powder deposition (1)
- Gd3+ (1)
- Gefügeanalyse (1)
- Gefügerekonstruktion (1)
- General Chemistry (1)
- General Computer Science (1)
- General Engineering (1)
- Geometrical factors (1)
- Glass Ceramic (1)
- Glass capillaries (1)
- Glass crystallization stress (1)
- Glass fiber reinforced polymer (1)
- Glass fiber reinforced polymers (1)
- Glass fiber-epoxy composites (1)
- Glass fibre (1)
- Glass forming (1)
- Glass forming melts (1)
- Glass liner (1)
- Glass manufacturing (1)
- Glass scintillator (1)
- Glass-ceramics (1)
- Glass-ceramics definition (1)
- Global stability criterion (1)
- Gnomonic projections (1)
- Grade S960QL steel (1)
- Gradient-enhanced fatigue model (1)
- Grain Boundary (1)
- Grain Boundary Corrosion (1)
- Grain Boundary Phase Diagram (1)
- Grain Boundary Segregation (1)
- Grain Boundary Spinodal (1)
- Grain boundary oxidation (1)
- Grain boundary phase diagram (1)
- Grain boundary precipitates (1)
- Grain boundary structure (1)
- Grain boundary thermodynamics (1)
- Grain growth (1)
- Grain structure (1)
- Granules (1)
- Graphite (1)
- Growth kinetics (1)
- Growth rate (1)
- HEA (1)
- Hardness (1)
- Hausner ratio (1)
- Heat accumulation (1)
- Heat-resistant nickel alloys (1)
- Hertzian cracks (1)
- Hierarchical microstructure (1)
- Hierarchical microstructure Premartensite (1)
- Hierarchical porosities (1)
- High - temperature (1)
- High Cycle Fatigue (1)
- High Entropy Alloy (1)
- High Entropy Alloys (1)
- High density polyethylene (1)
- High interstitial austenitic steel (1)
- High pressure (1)
- High temperature nickel-based eutectic alloys (1)
- High temperature oxidation (1)
- High temperatures (1)
- High-Entropy Alloys (1)
- High-Entropy Materials (1)
- High-entropy alloys (1)
- High-strength steel (1)
- High-temperature oxidation (1)
- High-temperature properties (1)
- High-voltage testing (1)
- High‐temperature corrosion (1)
- Hipims (1)
- Hochleistungskeramik (1)
- Homogenization (1)
- Hot isostatic pressing (HIP) (1)
- Hot pressing (1)
- Hot stage microscopy (1)
- Hybrid Manufacturing (1)
- Hydrogel (1)
- Hydrogen diffusivity (1)
- Hydrogen permeation (1)
- Hydrogen storage (1)
- Hydrogen storage tank (1)
- Hydrothermal Ageging (1)
- Hydrous glass (1)
- Hygrothermal (1)
- IASCC (1)
- IN 718 (1)
- IR spectroscopy (1)
- ISRU (1)
- Impact damage (1)
- Impact wear (1)
- In situ diffraction (1)
- In situ synthesis (1)
- In situ tensile test (1)
- In situ thermal-annealing experiment (1)
- In-situ ED-XRD (1)
- In-situ Process Monitoring (1)
- In-situ SEM micro shear deformation (1)
- In-situ composites (1)
- In-situ diffraction (1)
- In-situ process monitoring (1)
- In-vivo (1)
- Incipient plasticity (1)
- Inclusion cluster (1)
- Inclusion size (1)
- Inconel 686 (1)
- Incremental lifetime models (1)
- Indentation (1)
- Indentation fracture toughness (1)
- Indentation hardness (1)
- Industrial and Manufacturing Engineering (1)
- Infrared nano AFM (1)
- Infrarotspektroskopie (1)
- Inkjet (1)
- Inter layer time (1)
- Interdiffusion (1)
- Interface (1)
- Interfacial Strength (1)
- Interfacial anisotropy (1)
- Interfacial free energy (1)
- Interlaboratory comparability (1)
- Intermetallic (1)
- Intermittent microplasticity (1)
- Intermodulation AFM (1)
- Internal Sulfidation (1)
- Internal Surfaces (1)
- Internal oxidation (1)
- Internal stresses (1)
- Interoperable (1)
- Intrinsic stress (1)
- Invar (1)
- Inverted classroom (1)
- Ion beam erosion Sectioning (1)
- Iron meteorite (1)
- Iron oxide (1)
- Irradiation (1)
- Isostatic hot pressing (HIP) (1)
- JMAK model (1)
- Joints/joining (1)
- KCl (1)
- KI (1)
- Kernel average misorientation (1)
- Keywords: Poly(ether ether ketone) (1)
- Kidney injury (1)
- Kikuchi bands (1)
- Knowledge Representation (1)
- Knowledge graphs (1)
- Knowledge representation (1)
- LIBS (1)
- LSD print (1)
- Laboratory X-ray diffraction (1)
- Laser (1)
- Laser Powder Bed Fusion (LPBF) (1)
- Laser beam melting (1)
- Laser beam melting (LBM) (1)
- Laser cladding (1)
- Laser powder-based directed energy deposition (1)
- Laser-induced slip casting (1)
- Lateral flow (1)
- Lattice distortions (1)
- Lattice parameter determination (1)
- Lattice point density (1)
- Lattice rotation (1)
- Lattice structures (1)
- Lattices (1)
- Laves phase (1)
- Layered manganese oxide (1)
- Layering misalignment (1)
- Lebensdauervorhersage (1)
- Lecture films (1)
- Li-ion battery (1)
- Lifetime prediction (1)
- Light curing (1)
- Lindemann criterion (1)
- Linear elastic fracture mechanics (1)
- Linked open data (1)
- Liquid Metal Embrittlement (1)
- Liquid metal embrittlement (1)
- Liquid phase sintering (1)
- Liquid-metal embrittlement (1)
- Lithography-based technologies (1)
- Log-normal distribution (1)
- Long-term aging (1)
- Long-term calculation (1)
- Long-term storage (1)
- Low carbon steel (1)
- Low expansion (1)
- Low strain (1)
- Low-Cycle Fatigue (LCF) (1)
- Low-cycle fatigue (1)
- Low-loading (1)
- MEA (1)
- MGS-1 regolith simulant (1)
- MOF-74 (1)
- MOUSE (1)
- Machine learning (1)
- Magmatic and hydrothermal processes (1)
- Magnetic domain distribution (1)
- Magnetic shape memory (1)
- Magnetic stray field (1)
- Magnetic stray fields (1)
- Magnetomechanical effect (1)
- Manufacturing (1)
- Martensitic steel (1)
- Martensitic steels (1)
- Martensitic structure (1)
- Master curve (1)
- Material degradation (1)
- Material failure (1)
- Material modeling (1)
- Materials Chemistry (1)
- Materials Modelling (1)
- Materials Testing (1)
- Materials informatics (1)
- Materials science (1)
- Materials science and engineering (1)
- Matrix residual stress (1)
- Mean atomic number (1)
- Mean-field modelling (1)
- Mechanical anisotropy (1)
- Mechanical behavior (1)
- Mechanical deformation (1)
- Medium Entropy Alloys (1)
- Medium entropy alloy (1)
- Medium entropy alloys (1)
- Melt pool boundary (1)
- Melting (1)
- Meta material (1)
- Metal Magnetic Memory (1)
- Metal additive manufacturing (1)
- Metal and alloys (1)
- Metal magnetic memory (1)
- Metallic Glass (1)
- Metallic materials (1)
- Metals and Alloys (1)
- Methodology (1)
- Micro-shrinkages (1)
- Microplastic stress (1)
- Microplastics (1)
- Microsegregation (1)
- Microspine (1)
- Microstructur (1)
- Microstructural changes of a Fe Si alloy (1)
- Microstructural evolution (1)
- Microstructure analysis (1)
- Microstructure, γ/γ' misfit (1)
- Microstrucure reconstruction (1)
- Microwave technology (1)
- Mikrostruktur (1)
- Milling (1)
- Miniature specimens (1)
- Mis-match (1)
- Misfitting precipitate (1)
- Misorientation (1)
- Mixed Ca-K-Na phosphates (1)
- Mixed conductors (1)
- Mixed-linkers (1)
- Mn-oxides (1)
- Model (1)
- Moisture (1)
- Molecular Dynamics (1)
- Molten salt (1)
- Moon (1)
- Multiaxial deformation (1)
- Multilayer (1)
- Multilayer ceramic technology (1)
- Multilayers (1)
- Multiple cracks (1)
- NGS (1)
- Na and K rhenanites (1)
- Nano CRM (1)
- Nano-ceramic-additive-manufacturing photoresin (1)
- Nano-composite (1)
- Nano-scratch test (1)
- NanoCAM (1)
- Nanocomposites (1)
- Nanocrystalline alloys (1)
- Nanocrystalline structure (1)
- Nanoelectromechanical systems (NEMS) (1)
- Nanomaterials (1)
- Nanoparticle structure (1)
- Nanopowder (1)
- Nanoribbons (1)
- Nanoscale multilayers (1)
- Nanostructure quantification (1)
- Natural (1)
- Natural silver wires (1)
- Nb3Sn (1)
- Near Infrared Spectroscopy (1)
- Networking (1)
- Neutron Diffraction (1)
- Ni-Mn-Ga (1)
- NiMaGa (1)
- NiTi (1)
- Nickel-base alloy (1)
- Nitride (1)
- Non-destructive Materials (1)
- Non-metallic inclusions (1)
- Non-serrated inhomogeneous flow (1)
- Notch (1)
- Nucleation (1)
- Nucleation tendency (1)
- Number density (1)
- Nydrogen melting (1)
- Online Process Monitoring (1)
- Optical and Magnetic Materials (1)
- Optical centrifugation (1)
- Optical criterion of brittleness (1)
- Optical tweezers (1)
- Ordered/disordered structures (1)
- Ordering (1)
- Orientation (1)
- Orientation refinement (1)
- Orientation relationship (1)
- Orowan Mechanism (1)
- Osteogenesis (1)
- Oxidation protection (1)
- Oxide (1)
- Oxide coatings (1)
- Oxygen evolution reaction (1)
- PBF-LB/M/316L (1)
- PE-HD Sorption (1)
- PLS-DA (1)
- PV modules (1)
- Packaging (1)
- Parabolic flight (1)
- Parametric modeling (1)
- Particle size (1)
- Particle-bed binder jetting (1)
- Passive components and circuits (1)
- Permittivity reduction (1)
- Phase Diagram (1)
- Phase diagram (1)
- Phase field crystal (1)
- Phase field method (1)
- Phase field model (1)
- Phase separation (1)
- Phase stability (1)
- Phase transformation (1)
- Phase-Field Simulations (1)
- Phase-field model (1)
- Phase-field modelling (1)
- Phosphate (1)
- Photocleavable organosilanes (1)
- Photopolymer composites (1)
- Phototrophs (1)
- Photovoltaic modules (1)
- Physical aging (1)
- Physical properties (1)
- Phytolith (1)
- Pipeline network (1)
- Pitting corrosion (1)
- Plasma imaging (1)
- Plasma nanocoatings (1)
- Plasma spray (1)
- Plasmon enhancement (1)
- Platinum-group-metals (1)
- Polyaniline (1)
- Polymer analysis/characterization (1)
- Polymer composite (1)
- Polymer matrix composites (1)
- Polymer-ceramic mixtures (1)
- Polymer-matrix composites (PMC) (1)
- Polymeric Materials (1)
- Polymer–matrix composites (1)
- Polyolefins (1)
- Polypropylene (1)
- Polystyrene (1)
- Polyurethane (1)
- Porcelain (1)
- Pore (1)
- Pores (1)
- Porosification (1)
- Porous materials (1)
- Portable sensor (1)
- Portfolio (1)
- Positron annihilation spectroscopy (1)
- Powder bed additive manufacturing (1)
- Powder bed density (1)
- Powder diffraction (1)
- Powder flow (1)
- Powder processing (1)
- Powder rheology (1)
- Powder-based processes (1)
- Powdered activated carbon (1)
- Power factor (1)
- Power law (1)
- Precipitate shape (1)
- Pressure assisted sintering (1)
- Preventive strategies (1)
- Principal stress (1)
- Principal stress components (1)
- Printing (1)
- Process (1)
- Process development (1)
- Processing window (1)
- Production scatter (1)
- Projection center (1)
- Projekt AGIL - Alterung additiv gefertigter metallischer Materialien und Komponenten (1)
- Properties (1)
- Protection (1)
- Pseudosymmetry (1)
- Pull-out composite materials (1)
- Pultruded fiber rods (1)
- Pulveraktivkohle (1)
- Quality assurance (1)
- Radon transform (1)
- Reaction Sintering (1)
- Real time growth control (1)
- Real-time deformation (1)
- Real-time qPCR (1)
- Recommendations (1)
- Recycling (1)
- Reference data (1)
- Reference nanoparticles (1)
- Refractory alloy (1)
- Refractory high entropy alloys (1)
- Refractory superalloys (1)
- Regolith (1)
- Reheating (1)
- Rejuvenation (1)
- Relaxation fatigue (1)
- Reliability (1)
- Residual Stress (1)
- Residual strains (1)
- Residual stresses (1)
- Resistance spot welding (1)
- Resistance stress (1)
- Resonance testing (1)
- Reusable data (1)
- Review (1)
- Rhodonia placenta (1)
- Round Robin (1)
- S-phase (1)
- SAXS (1)
- SDC (1)
- SEM micrography (1)
- SEM wood characterization (1)
- SLM (1)
- SO2 (1)
- STEM (1)
- Safety (1)
- Safety assessment (1)
- Samarium doped ceria (1)
- Sample holder (1)
- Sand blasting (1)
- Sandwich (1)
- Scaffold (1)
- Scaffold geometry (1)
- Scaffolds (1)
- Scale-dependent behavior (1)
- Scan strategies (1)
- Scanning acoustic microscopy (SAM) (1)
- Scanning transmission electron microscopy (STEM) (1)
- Scarf joint (1)
- Scavenging effect of iron (1)
- Schadensanalyse (1)
- Schlickerdeposition (1)
- SchwarzP cells (1)
- Schwingstreifen (1)
- Schädigung (1)
- Scratches (1)
- Segregation (1)
- Segregation Engineering (1)
- Segregation engineering (1)
- Selective laser melting (SLM) (1)
- Self-Assembly (1)
- Self-organization (1)
- Semantic Data Integration (1)
- Semantic Interoperability (1)
- Semantic Web Technologies (1)
- Semantic data integration (1)
- Semantic interoperability (1)
- Semantic web (1)
- Serial sectioning (1)
- Serienschnitte (1)
- Sewage treatment plant (1)
- Shadowgraphy (1)
- Shape memory alloy (1)
- Shape memory alloys (1)
- Shear (1)
- Shear load (1)
- Shear modulus (1)
- Shear strain (1)
- Shear testing (1)
- Shear thinning (1)
- Shear-band cavitation (1)
- Shear-band structure (1)
- Short range order (1)
- Short-beam strength (1)
- Silicate glass (1)
- Silicate glass-ceramics (1)
- Silicoborate glasses (1)
- Silicon Carbide (1)
- Silicon release (1)
- Silikatkeramik (1)
- Silver metallization paste (1)
- Simulation (1)
- Simulation workflow (1)
- Single crystal Ni-Base superalloys (1)
- Single crystal superalloys (1)
- Single fiber pull-out test (1)
- Single-Crystal (1)
- Single-crystal (1)
- Sinter retardation (1)
- Sintering additive (1)
- Sinus floor augmentation (1)
- Size (1)
- Size effect (1)
- Sliding simulation (1)
- Slip localization (1)
- Slip-rolling (1)
- Slow crack growth (1)
- Slurry optimization (1)
- Small-angle scattering (1)
- Small-scale (1)
- Smart materials (1)
- Smectite (1)
- Soda lime silicate glass (1)
- Soda-lime silicate glass (1)
- Soda-lime-silica (1)
- Soda-lime-silica glass (1)
- Sodium ion batteries (1)
- Softening temperature (1)
- Soil (1)
- Sol-gel coating (1)
- Solar panels (1)
- Solid-State-Synthesis (1)
- Solid-state-synthesis (1)
- Spar cap design (1)
- Specimen geometry (1)
- Spinodal decomposition (1)
- Split-vacancy defect complexes (1)
- Stable crack growth (1)
- Stainless steel (1)
- Standardisation (1)
- Statistics (1)
- Steam oxidation resistance (1)
- Steel P92 (1)
- Steel alloy (1)
- Stereoscopy (1)
- Strain (1)
- Strain difference (1)
- Strain energy (1)
- Stratégies deprévention (1)
- Strength (1)
- Stress distribution (1)
- Stress intensity (1)
- Stress-corrosion (1)
- Stress-strain behavior (1)
- Stress-strain-behavior (1)
- Structural composites (1)
- Structural defects (1)
- Structural dynamics (1)
- Structural health monitoring (1)
- Structural steel (1)
- Subcritical crack growth (1)
- Sulfiding (1)
- Superalloy single crystals (1)
- Superelasticity (1)
- Superlattice extrinsic stacking faults (1)
- Supersaturation (1)
- Support configurations (1)
- Support vector machines (1)
- Surface (1)
- Surface crystallization (1)
- Surface elasticity (1)
- Surface energy (1)
- Surface modification (1)
- Surface nucleation (1)
- Surface roughness (1)
- Surface stress (1)
- Surface-induced Melting (1)
- Swept wavelength interferometry (1)
- Symmetric dwell periods (1)
- Synchrotron X-ray diffraction (1)
- Synchrotron micro-tomography (1)
- Synchrotron radiations (1)
- Synthesis (1)
- T1 precipitate (1)
- TIG-welding (1)
- Tb3+ (1)
- Technical Ceramics (1)
- Temperature (1)
- Temperature dependence (1)
- Tensile Test Ontology (1)
- Tensile strength (1)
- Tensile tests (1)
- Tetragonal distortion (1)
- Tetragonality (1)
- Thermal Cycling (1)
- Thermal cycling (1)
- Thermal desorption mass spectrometry (1)
- Thermo-mechanical loading (1)
- Thermo-mechanics (1)
- Thermoanalysis (1)
- Thermobimetal (1)
- Thermoelectric oxide (1)
- Thermoelectric oxides (1)
- Thermoelectrics (1)
- Thermogravimetrie (1)
- Thermogravimetry (1)
- Thermomechanical fatigue (1)
- Thermoplastic (1)
- Thermoplastic forming (1)
- Thermoplastic matrix (1)
- Thermoplastic prepreg (1)
- Thermoset composition (1)
- Thermosetting resin (1)
- Thickening (1)
- Thin films (1)
- Thin tribofilm (1)
- Thiol-ene click chemistry (1)
- Three-dimensional Bone tissue engineering (1)
- Three-dimensional tomographies (1)
- Titanium (1)
- Tooth wear (1)
- Topography (1)
- Transformer (1)
- Transmission Kikuchi diffraction (1)
- Transmission electron microscope (TEM) (1)
- Transmissionselektronenmikroskopie (1)
- Transmittance (1)
- Transparency (1)
- Transparent ceramic (1)
- Tribology (1)
- Tricalcium Phosphate (1)
- Triply Periodical Minimal Surface (1)
- Tungsten carbide (1)
- Tungsten-Rhenium (1)
- Turbine disk (1)
- Twinning (1)
- Two-photon adsorption (1)
- Two-photon polymerization (1)
- Two-photon-polymerization (1)
- UV-irradiation (1)
- Ultrasonic assited machining (1)
- Ultrasound (1)
- Unidirectional composites (1)
- Upconversion (1)
- Upconverting nanoparticles (1)
- Utilization, and storage (CCUS) technology (1)
- Vacancies (1)
- Vickers Hardness (1)
- Vickers hardness (1)
- Viscoelastic model (1)
- Viscoplasticity (1)
- Visual ontology development (1)
- Visualization (1)
- Vivianite (1)
- Vocabulary providers (1)
- Volatiles from thermosets (1)
- Volume changes (1)
- Volume fraction (1)
- WAXS (1)
- Water (1)
- Water Diffusion (1)
- Water droplet erosion resistance (1)
- Water in glass (1)
- Water-based (1)
- Weibull distribution (1)
- Welding (1)
- Wet chemical etching (1)
- Whole-chain CCS scenario (1)
- Wood protection (1)
- Work of adhesion (1)
- X-ray Diffraction (1)
- X-ray diffraction analysis (1)
- X-ray tomographic (1)
- X-ray-diffraction (1)
- XPCS (1)
- XRD (1)
- Young's modulus (1)
- Young`s modulus (1)
- Young´s modulus (1)
- Young’s Modulus (1)
- Yttria stabilized zirconia (1)
- Zinc oxide (1)
- Zirconia-toughened alumina (1)
- Zirconia: yttria stabilized (1)
- ZnO (1)
- aerosol deposition method (ADM) (1)
- arbidic austempered ductile iron (1)
- battery aging mechanism (1)
- bioactive (1)
- biomaterials (1)
- bone (1)
- calcium cobaltite (1)
- corrosion (1)
- current collector corrosion (1)
- depth profiles (1)
- electron microscopy (1)
- high entropy alloys (1)
- high pressure (1)
- hydrogen storage (1)
- in-situ synthesis (1)
- infrared spectroscopy (1)
- microstructural changes (1)
- negative crystal growth (1)
- oxidation (1)
- phosphate glasses (1)
- scanning electron microscopy (1)
- sulfidation (1)
- thermoelectric oxide (1)
- thermoelectrics (1)
- water speciation (1)
- µ-gravity (1)
- γ- и γ'-фазы, период кристаллической решетки (1)
- γ/γ' matrix (1)
- γ″ phase (1)
- θ′ phase (1)
- θ′-(Al2Cu) precipitate phase (1)
- высокие температуры (1)
- жаропрочные нике- левые сплавы (1)
- монокристалл (1)
- рентгеноструктурный анализ (1)
Organisationseinheit der BAM
- 5 Werkstofftechnik (418)
- 5.1 Mikrostruktur Design und Degradation (152)
- 5.4 Multimateriale Fertigungsprozesse (78)
- 5.2 Metallische Hochtemperaturwerkstoffe (71)
- 5.6 Glas (55)
- 5.5 Materialmodellierung (47)
- 5.0 Abteilungsleitung und andere (43)
- 5.3 Polymere Verbundwerkstoffe (41)
- 9 Komponentensicherheit (37)
- 8 Zerstörungsfreie Prüfung (36)
- 7 Bauwerkssicherheit (33)
- 6 Materialchemie (31)
- 8.5 Röntgenbildgebung (26)
- 9.4 Integrität von Schweißverbindungen (15)
- 7.5 Technische Eigenschaften von Polymerwerkstoffen (13)
- 7.6 Korrosion und Korrosionsschutz (12)
- 6.1 Oberflächen- und Dünnschichtanalyse (11)
- 6.3 Strukturanalytik (11)
- 1 Analytische Chemie; Referenzmaterialien (10)
- 9.0 Abteilungsleitung und andere (9)
- 9.6 Additive Fertigung metallischer Komponenten (9)
- 4 Material und Umwelt (8)
- 6.6 Physik und chemische Analytik der Polymere (8)
- 8.0 Abteilungsleitung und andere (8)
- 9.3 Schweißtechnische Fertigungsverfahren (7)
- 6.2 Material- und Oberflächentechnologien (4)
- 6.7 Materialsynthese und Design (4)
- 7.4 Baustofftechnologie (4)
- 9.2 Versuchsanlagen und Prüftechnik (4)
- 1.7 Organische Spuren- und Lebensmittelanalytik (3)
- 4.1 Biologische Materialschädigung und Referenzorganismen (3)
- 4.2 Material-Mikrobiom Wechselwirkungen (3)
- 8.4 Akustische und elektromagnetische Verfahren (3)
- 9.5 Tribologie und Verschleißschutz (3)
- 1.0 Abteilungsleitung und andere (2)
- 1.2 Biophotonik (2)
- 1.4 Prozessanalytik (2)
- 1.6 Anorganische Referenzmaterialien (2)
- 3 Gefahrgutumschließungen; Energiespeicher (2)
- 4.0 Abteilungsleitung und andere (2)
- 4.3 Schadstofftransfer und Umwelttechnologien (2)
- 6.4 Materialinformatik (2)
- 6.5 Synthese und Streuverfahren nanostrukturierter Materialien (2)
- 7.1 Baustoffe (2)
- S Qualitätsinfrastruktur (2)
- VP Vizepräsident (2)
- VP.1 eScience (2)
- 1.3 Instrumentelle Analytik (1)
- 1.9 Chemische und optische Sensorik (1)
- 2 Prozess- und Anlagensicherheit (1)
- 2.1 Sicherheit von Energieträgern (1)
- 3.0 Abteilungsleitung und andere (1)
- 3.1 Sicherheit von Gefahrgutverpackungen und Batterien (1)
- 7.0 Abteilungsleitung und andere (1)
- 7.7 Modellierung und Simulation (1)
- 8.1 Sensorik, mess- und prüftechnische Verfahren (1)
- 8.2 Zerstörungsfreie Prüfmethoden für das Bauwesen (1)
- S.0 Abteilungsleitung und andere (1)
- S.1 Qualität im Prüfwesen (1)
Paper des Monats
- ja (11)
Spherical mesoporous bioactive glasses in the silicon dioxide (SiO2)-phosphorus pentoxide (P2O5)–calcium oxide (CaO) system with a high specific surface area of up to 300m2/g and a medium pore radius of 4 nm were synthesized by using a simple one-pot surfactant-assisted sol–gel synthesis method followed by calcination at 500–700°C. The authors were able to control the particle properties by varying synthesis parameters to achieve microscale powders with spherical morphology and a particle size of around 5–10 mm by employing one structure-directing agent. Due to a high Calcium oxide content of 33·6mol% and a phosphorus pentoxide content of 4·0mol%, the powder showed very good bioactivity up to 7 d of immersion in simulated Body fluid. The resulting microspheres are promising materials for a variety of life science applications, as further processing – for example, granulation – is unnecessary. Microspheres can be applied as materials for powder-based additive manufacturing or in stable suspensions for drug release, in bone cements or fillers.
This third part of the review on defects as root cause of fatigue failure addresses cavities (pores, micro-shrinkages, unmelted regions), defective microstructures and microcracks as material defects and defects due to local damage during manufacturing, service and maintenance such as dents, scratches and localized corrosion. In addition, damage due to contact fatigue and the effect of surface roughness are discussed in the context of fatigue failure. Also addressed is the competition between different kinds of defects in controlling the initiation and early growth of fatigue cracks.
According to the definition of the ASM handbook [1,3], a defect is "an imperfection. that can be shown to cause failure by a quantitative analysis and that would not have occurred in the absence of the imperfection". The topic of the present three-part review is a discussion of defects which can cause failure in cyclically loaded structures. The features discussed comprise material defects such as non-metallic inclusions, pores or micro-shrinkages, etc. and geometric defects such as surface roughness and secondary notches which have their origin in manufacturing, and defects such as surface damage due to scratches, impact events or contact fatigue as well as corrosion pits which arise in service. In this first part, the discussion is prefaced by an introduction to basic aspects which are essential for a deeper understanding of the characteristics and mechanisms how the defects influence fatigue crack initiation and propagation. These include the life cycle of a fatigue crack from initiation up to fracture, crack arrest, multiple crack initiation and coalescence, and the material and geometrical properties affecting these.
Defects as a root cause of fatigue failure of metallic components. II: Non-metallic inclusions
(2019)
This second part of the review on defects as root cause of fatigue failure comprises the origin, the nature and the effects of non-metallic inclusions. Topics addressed are the different kinds of inclusions formed during the manufacturing process, various types of mis-match causing local stresses and, as a consequence, fatigue crack initiation, and effects of characteristics such as size, morphology, localization, spatial distribution and orientation of the defects on the fatigue behavior. Methods for inclusion counting and sizing are discussed along with statistical aspects necessary to be considered when evaluating structural components.
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.
Upconverting nanoparticles are essential in modern photonics due to their ability to convert infrared light to visible light. Despite their significance, they exhibit limited brightness, a key drawback that can be addressed by combining them with plasmonic nanoparticles. Plasmon-enhanced upconversion has been widely demonstrated in dry environments, where upconverting nanoparticles are immobilized, but constitutes a challenge in liquid media where Brownian motion competes against immobilization.
This study employs optical tweezers for the three-dimensional manipulation of an individual upconverting nanoparticle, enabling the exploration of plasmon-enhanced upconversion luminescence in water. Contrary to expectation, experiments reveal a long-range (micrometer scale) and moderate (20%) enhancement in upconversion luminescence due to the plasmonic resonances of gold nanostructures. Comparison between experiments and numerical simulations evidences the key role of Brownian motion. It is demonstrated how the three-dimensional Brownian fluctuations of the upconverting nanoparticle lead to an “average effect” that explains the magnitude and spatial extension of luminescence enhancement.
For more than half a century, spinodal decomposition has been a key phenomenon in considering the formation of secondary phases in alloys. The most prominent aspect of the spinodal phenomenon is the lack of an energy barrier on its transformation pathway, offering an alternative to the nucleation and growth mechanism. The classical description of spinodal decomposition often neglects the influence of defects, such as grain boundaries, on the transformation because the innate ability for like-atoms to cluster is assumed to lead the process. Nevertheless, in nanocrystalline alloys, with a high population of grain boundaries with diverse characters, the structurally heterogeneous landscape can greatly influence the chemical decomposition behavior. Combining atom-probe tomography, precession electron diffraction and density-based phase-field simulations, we address how grain boundaries contribute to the temporal evolution of chemical decomposition within the miscibility gap of a Pt-Au nanocrystalline system. We found that grain boundaries can actually have their own miscibility gaps profoundly altering the spinodal decomposition in nanocrystalline alloys. A complex realm of multiple interfacial states, ranging from competitive grain boundary segregation to barrier-free low-dimensional interfacial decomposition, occurs with a dependency upon the grain boundary character.
Grain boundaries (GBs) are planar lattice defects that govern the properties of many types of polycrystalline materials. Hence, their structures have been investigated in great detail. However, much less is known about their chemical features, owing to the experimental difficulties to probe these features at the atomic length scale inside bulk material specimens. Atom probe tomography (APT) is a tool capable of accomplishing this task, with an ability to quantify chemical characteristics at near-atomic scale. Using APT data sets, we present here a machine-learning-based approach for the automated quantification of chemical features of GBs. We trained a convolutional neural network (CNN) using twenty thousand synthesized images of grain interiors, GBs, or triple junctions. Such a trained CNN automatically detects the locations of GBs from APT data. Those GBs are then subjected to compositional mapping and analysis, including revealing their in-plane chemical decoration patterns. We applied this approach to experimentally obtained APT data sets pertaining to three case studies, namely, Ni-P, Pt-Au, and Al-Zn-Mg-Cu alloys. In the first case, we extracted GB specific segregation features as a function of misorientation and coincidence site lattice character. Secondly, we revealed interfacial excesses and in-plane chemical features that could not have been found by standard compositional analyses. Lastly, we tracked the temporal evolution of chemical decoration from early-stage solute GB segregation in the dilute limit to interfacial phase separation, characterized by the evolution of complex composition patterns. This machine-learning-based approach provides quantitative, unbiased, and automated access to GB chemical analyses, serving as an enabling tool for new discoveries related to interface thermodynamics, kinetics, and the associated chemistry-structure-property relations.
Aero-engine turbine disks are safety-relevant components which are operated under high thermal and mechanical stress conditions. The actual part qualification and certification procedures make use of spin-tests conducted on production-similar disks. While these tests provide, on the one hand, a reliable definition of the critical conditions for real components, on the other hand they represent a relevant cost item for engine manufacturers. The aim of this work is to present two alternative burst speed assessment methods under development based on the Failure Assessment Diagram (FAD) and a global stability criterion, respectively. In the scope of the fracture mechanics assessment, the failure modes hoop-burst and rim-peeling are investigated with semicircular surface cracks modelled at the critical regions on the turbine disk. The comparison of the predicted critical rotational speed shows good agreement between the assessment methods.
AbstractHigh-strength aluminum alloys used in aerospace and automotive applications obtain their strength through precipitation hardening. Achieving the desired mechanical properties requires precise control over the nanometer-sized precipitates. However, the microstructure of these alloys changes over time due to aging, leading to a deterioration in strength. Typically, the size, number, and distribution of precipitates for a quantitative assessment of microstructural changes are determined by manual analysis, which is subjective and time-consuming. In our work, we introduce a progressive and automatable approach that enables a more efficient, objective, and reproducible analysis of precipitates. The method involves several sequential steps using an image repository containing dark-field transmission electron microscopy (DF-TEM) images depicting various aging states of an aluminum alloy. During the process, precipitation contours are generated and quantitatively evaluated, and the results are comprehensibly transferred into semantic data structures. The use and deployment of Jupyter Notebooks, along with the beneficial implementation of Semantic Web technologies, significantly enhances the reproducibility and comparability of the findings. This work serves as an exemplar of FAIR image and research data management.
Future lunar exploration can benefit greatly from In-Situ Resource Utilization. Accordingly, the in-Situ Resource Utilization approach highlights the need for detailed analysis of lunar regolith. In this study, JSC-2A Simulant was studied regarding its sintering and melting behaviour using Differential Thermal Analysis under ambient and inert conditions. The minerals at the crystalline peaks were determined using X-Ray Diffraction analysis.
Moreover, melting droplet shape and wetting behaviour of pressed regolith samples of different particle size distributions were studied by Hot Stage Microscopy technique. Hot Stage Microscopy experiments were performed at different heating rates under ambient conditions. Bloating effects within the solidified samples were then qualitatively examined by X-ray tomography. Lastly, the optimization of processing strategies for the Additive Manufacturing of lunar regolith is discussed.
Ceramic additive manufacturing (AM) requires a complex process chain with various post-processing steps that require expensive machines and special expertise. The key to further market penetration is AM that makes it possible to integrate into an already established ceramic process chain. Most successful AM technologies for ceramics are, however, based on processes that initially have been developed for polymeric materials. For ceramics AM, polymers or precursors are loaded with ceramic particles. This strategy facilitates the entry into AM, however the introduction of organic additives into the ceramic process chain represents a considerable technological challenge to ultimately obtain a ceramic component after additive shaping. In the present communication, two technologies based on ceramic suspensions will be introduced, the “layerwise slurry deposition” (LSD) and “laser induced slip casting” (LIS) technology. Both technologies take advantage of the high packing densities reached by conventional slip casting and moreover enable the processing of fines, even nanoparticles.
Additive manufacturing of SiSiC by layerwise slurry deposition and binder jetting (LSD-print)
(2019)
The current work presents for the first time results on the Additive Manufacturing of SiSiC complex parts based on the Layerwise Slurry Deposition (LSD) process. This technology allows to deposit highly packed powder layers by spreading a ceramic slurry and drying. The capillary forces acting during the process are responsible for the dense powder packing and the good joining between layers. The LSD process can be combined with binder jetting to print 2D cross-sections of an object in each successive layer, thus forming a 3D part. This process is named LSD-print.
By LSD-print and silicon infiltration, SiSiC parts with complex geometries and features down to 1mm and an aspect ratio up to 4:1 could be demonstrated.
The density and morphology were investigated for a large number of samples. Furthermore, the density and the mechanical properties, measured by ball-on-three-balls method, were in all three building directions close to isostatic pressed references.
As humanity contemplates manned missions to Mars, strategies need to be developed for the design and operation of hospitable environments to safely work in space for years. The supply of spare parts for repair and replacement of lost equipment will be one key need, but in-space manufacturing remains the only option for a timely supply. With high flexibility in design and the ability to manufacture ready-to-use components directly from a computeraided model, additive manufacturing (AM) technologies appear extremely attractive. For the manufacturing of metal parts, laser-beam melting is the most widely used AM process. However, the handling of metal powders in the absence of gravity is one prerequisite for its successful application in space. A gas flow throughout the powder bed is successfully applied to compensate for missing gravitational forces in microgravity experiments. This so-called gas-flow-assisted powder deposition is based on a porous Building platform acting as a filter for the fixation of metal particles in a gas flow driven by a pressure difference maintained by a vacuum pump.
The microstructure of an apatite-wollastonite (code name AP40) glass-ceramic is analyzed in this study by combining 2D microscopy, phase analysis, X-ray absorption and synchrotron X-ray refraction computed tomography (XCT and SXRCT, respectively). It is shown that this combination provides a useful toolbox to characterize the global microstructure in a wide scale range, from sub-micrometer to millimeter. The material displays a complex microstructure comprising a glassy matrix with embedded fluorapatite and wollastonite small crystals. In this matrix, large (up to 200 μm) spike-shaped structures are distributed. Such microstructural features are oriented around a central sphere, thereby forming a structure resembling a sea urchin. A unique feature of SXRCT, in contrast to XCT, is that internal interfaces are visualized; this allows one to show the 3D distribution of these urchins with exceptionally good contrast. Furthermore, it is revealed that the spike-shaped structures are not single crystals, but rather composed of sub-micrometric crystals, which are identified as fluorapatite and diopside phases by SEM-EDX analysis.
Instead of foreseeing and preparing for all possible scenarios of machine failures, accidents, and other challenges arising in space missions, it appears logical to take advantage of the flexibility of additive manufacturing for “in-space manufacturing” (ISM). Manned missions into space rely on complicated equipment, and their safe operation is a great challenge. Bearing in mind the absolute distance for manned missions to the Moon and Mars, the supply of spare parts for the repair and replacement of lost equipment via shipment from Earth would require too much time. With the high flexibility in design and the ability to manufacture ready-to-use components directly from a computer-aided model, additive manufacturing technologies appear to be extremely attractive in this context. Moreover, appropriate technologies are required for the manufacture of building habitats for extended stays of astronauts on the Moon and Mars, as well as material/feedstock. The capacities for sending equipment and material into space are not only very limited and costly, but also raise concerns regarding environmental issues on Earth. Accordingly, not all materials can be sent from Earth, and strategies for the use of in-situ resources, i.e., in-situ resource utilization (ISRU), are being
envisioned. For the manufacturing of both complex parts and equipment, as well as for large infrastructure, appropriate technologies for material processing in space need to be developed.
Characterization of Ti-6Al-4V fabricated by multilayer laser powder-based directed energy deposition
(2022)
Laser powder-based directed energy deposition (DED-L) is increasingly being used in additive manufacturing (AM). As AM technology, DED-L must consider specific challenges. It must achieve uniform volume growth over hundreds of layers and avoid heat buildup of the deposited material. Herein, Ti–6Al–4V is fabricated using an approach that addresses these challenges and is relevant in terms of transferability to DED–L applications in AM. The assessment of the obtained properties and the discussion of their relationship to the process conditions and resulting microstructure are presented. The quality of the manufacturing process is proven in terms of the reproducibility of properties between individual blanks and with respect to the building height. The characterization demonstrates that excellent mechanical properties are achieved at room temperature and at 400 °C.
Creep and creep damage behavior of stainless steel 316L manufactured by laser powder bed fusion
(2022)
This study presents a thorough characterization of the creep properties of austenitic stainless steel 316L produced by laser powder bed fusion (LPBF 316L) contributing to the sparse available data to date. Experimental results (mechanical tests, microscopy, X-ray computed tomography) concerning the creep deformation and damage mechanisms are presented and discussed. The tested LPBF material exhibits a low defect population, which allows for the isolation and improved understanding of the effect of other typical aspects of an LPBF microstructure on the creep behavior. As a benchmark to assess the material properties of the LPBF 316L, a conventionally manufactured variant of 316L was also tested. To characterize the creep properties, hot tensile tests and constant force creep tests at 600 °C and 650 °C are performed. The creep stress exponents of the LPBF material are smaller than that of the conventional variant. The primary and secondary creep stages and the times to rupture of the LPBF material are shorter than the hot rolled 316L. Overall the creep damage is more extensive in the LPBF material. The creep damage of the LPBF material is overall mainly intergranular. It is presumably caused and accelerated by both the appearance of precipitates at the grain boundaries and the unfavorable orientation of the grain boundaries. Neither the melt pool boundaries nor entrapped gas pores show a significant influence on the creep damage mechanism.