5 Werkstofftechnik
Filtern
Dokumenttyp
- Vortrag (121)
- Zeitschriftenartikel (71)
- Beitrag zu einem Tagungsband (24)
- Forschungsdatensatz (21)
- Posterpräsentation (20)
- Buchkapitel (7)
- Dissertation (4)
- Forschungsbericht (4)
- Sammelband (Herausgeberschaft für den kompletten Band) (3)
- Monografie (1)
Sprache
- Englisch (227)
- Deutsch (49)
- Französisch (1)
Schlagworte
- Ontology (33)
- Creep (27)
- Microstructure (23)
- Additive manufacturing (21)
- LCF (16)
- Additive Manufacturing (14)
- Degradation (13)
- Fatigue (13)
- Ti-6Al-4V (13)
- Aluminium (11)
- Alloy 2618A (10)
- Coarsening (10)
- FAIR (10)
- 316L (9)
- Aging (9)
- EN AW-2618A (9)
- Low Cycle Fatigue (9)
- Transmission electron microscopy (9)
- Crystal plasticity (8)
- Digitalization (8)
- Nickel-base superalloys (8)
- Ontologie (8)
- Residual stress (8)
- S-phase (8)
- Semantic Web Technologies (8)
- AGIL (7)
- AISI 316L (7)
- Additive Fertigung (7)
- Aluminium alloy (7)
- Anisotropy (7)
- Kriechen (7)
- Mechanical testing (7)
- Plattform MaterialDigital (7)
- Semantic Interoperability (7)
- Thermomechanical fatigue (7)
- Zugversuch (7)
- Data Interoperability (6)
- Knowledge Representation (6)
- Mikrostruktur (6)
- P92 (6)
- TMF (6)
- Computed Tomography (5)
- Crack growth (5)
- Damage (5)
- Dark-field transmission electron microscopy (DFTEM) (5)
- Data mapping (5)
- Digitalisierung (5)
- FAIR data (5)
- FAIR data management (5)
- Fe-Al alloys (5)
- HIP (5)
- Intermetallics (5)
- Iron aluminides (5)
- Knowledge graph and ontologies (5)
- Laser powder bed fusion (5)
- PMD Core Ontology (5)
- Reference data (5)
- Shear modulus (5)
- Stress relaxation (5)
- Tensile Test (5)
- Tensile testing (5)
- Wissensrepräsentation (5)
- Young's modulus (5)
- Aluminum alloys (4)
- Brinell hardness (4)
- Creep-fatigue (4)
- Data Fusion (4)
- EBSD (4)
- Elastic modulus (4)
- Electron microscopy (4)
- Fatigue crack growth (4)
- Laser Powder Bed Fusion (4)
- Microstrucrue Design (4)
- Ni-Resist (4)
- Normung (4)
- Phase-field simulation (4)
- Plattform Material Digital (4)
- Scale-bridging (4)
- Schädigung (4)
- Superalloy (4)
- Tensile Test Ontology (4)
- Tensile test (4)
- Virtual experiments (4)
- Crack (3)
- Crack propagation (3)
- Crack tip opening displacement (3)
- Creep behavior (3)
- Creep data (3)
- Dark-field transmission electron microscopy (3)
- Diffraction (3)
- Digtial Representation (3)
- Electronic Lab Notebook (3)
- Ferritic-martensitic steels (3)
- Fractography (3)
- Hardness (3)
- Heat treatment (3)
- High temperature mechanical properties (3)
- IN 718 (3)
- Interoperability (3)
- Knowledge graph (3)
- Lebensdauer (3)
- Low cycle fatigue (3)
- Mechanical behavior (3)
- Mechanische Eigenschaften (3)
- Metadata schema (3)
- Microstructure evolution (3)
- Ontologies (3)
- PBF-LB/M/316L (3)
- PMDco (3)
- Phase-field (3)
- Precipitation (3)
- Referenzdaten (3)
- Reproducibility (3)
- Research Data Management (3)
- S-Phase (3)
- Semantic Data (3)
- Semantic Web (3)
- Single-crystals (3)
- Superalloys (3)
- Superlegierung (3)
- Syngle Crystal alloy (3)
- Tempered Martensite Ferritic Steels (3)
- Tempered martensite-ferritic steel (3)
- Tensile data (3)
- Thermo-Mechanical Fatigue (3)
- Al-Cu-Li alloys (2)
- Alterung (2)
- Aluminium Alloy (2)
- Aluminum (2)
- Aluminum alloy (2)
- CALPHAD (2)
- CT (2)
- Casting (2)
- Chemo-mechanical coupling (2)
- Computed tomography (2)
- Concrete (2)
- Continnum damage model (2)
- Copper (2)
- Copper alloys (2)
- Creep-Fatigue (2)
- Cyclic softening (2)
- Data Management (2)
- Data Structures (2)
- Data management (2)
- Dataset (2)
- Density-based Thermodynamics (2)
- Density-based model (2)
- Densty-based Thermodynamics (2)
- Diffraction Elastic Constants (2)
- Diffusion (2)
- Digital material representation (2)
- Digital representation (2)
- Digitization (2)
- Dislocation (2)
- Dislocations (2)
- Elasticity (2)
- Electron Backscatter Diffraction (2)
- Electron backscatter diffraction (2)
- Environmentally assisted cracking (2)
- FAIR Data Management (2)
- Fatigue performance (2)
- Fatigue testing (2)
- Finite element analysis (2)
- Fracture mechanics (2)
- Glass forming (2)
- High Cycle Fatigue (2)
- High Temperature Testing (2)
- Joined nickel-based alloys (2)
- Kleinprobenprüfung (2)
- Knowledge Graph (2)
- Laser Powder Bed fusion (2)
- Long-term behavior (2)
- Mass transport (2)
- Material digital (2)
- Materials science (2)
- Metal seal (2)
- Micromechanical model (2)
- Microstructure-property-correlation (2)
- Multiaxial deformation (2)
- NFDI (2)
- Neutron diffraction (2)
- Nickel-base alloy (2)
- Notches (2)
- Ontologien (2)
- Ontology development (2)
- Ostwald ripening (2)
- PMD (2)
- Parametric modeling (2)
- Plastic deformation (2)
- Polymer (2)
- Probengrößeneffekt (2)
- Rapid solidification (2)
- Residual Stress (2)
- S355 steel sheet (2)
- Semantic Representation (2)
- Semantic web (2)
- Semantisches Web (2)
- Simulation (2)
- Simulation of concrete (2)
- Single-Crystal (2)
- Standard (2)
- Standardisierung (2)
- Standardization (2)
- Structural steel (2)
- Superconducting magnet (2)
- Symmetric dwell periods (2)
- TEM (2)
- Tensile Properties (2)
- Thermodynamics (2)
- Ti64 (2)
- TiAl5V4 (2)
- Titan (2)
- Titanium (2)
- Under cyclic loading (2)
- Vickers hardness (2)
- Viscoplasticity (2)
- Wall thickness (2)
- Zugeigenschaften (2)
- 316L stainless steel (1)
- 3D-finite element modeling (1)
- 9-12% Cr ferritic-martensitic steels (1)
- 9-12%Cr steel (1)
- 9–12%Cr steel (1)
- AM (1)
- Abgasturbolader Heißteile (1)
- Accelerated integration scheme (1)
- Accelerated temporal integration (1)
- Accessible (1)
- Age hardening (1)
- Ageing (1)
- Al alloys (1)
- Al-Cu alloy (1)
- Al-Cu-Li-alloy (1)
- Al-Li alloys (1)
- Al2CuMg (1)
- Allgemeine Grundlagen (1)
- Alloy 2818A (1)
- Alloy design (1)
- Alloy microstructure (1)
- Aluminiumlegierung (1)
- Aluminum Alloy Aging (1)
- Anwendungen (1)
- Atomistic simulations (1)
- Aufbau von Festkörpern (1)
- Austenite-to-martensite phase transformation (1)
- Austenitic cast iron (1)
- Austenitischer Stahl (1)
- Automatable digital approach (1)
- Automated finite element analysis (1)
- Automated image analysis (1)
- Automation (1)
- Automatische Finite Element Simulation (1)
- Beanspruchung (1)
- Bitter technique (1)
- Bruch (1)
- CKAN (1)
- CMSX4 (1)
- Calibration (1)
- Carbon steel (1)
- Centrifugal casting (1)
- Centrifugal compressor wheel (1)
- Characterisation (1)
- Characterization (1)
- Charpy test (1)
- Chemische Analyse (1)
- Coefficient of thermal expansion (1)
- Complex borides (1)
- Compositionally complex alloys (1)
- Contact mechanics (1)
- Corrosion (1)
- Craze-crack mechanism (1)
- Creep behaviour (1)
- Creep mechanisms (1)
- Creep, Creep Rupture, and Stress Rupture (1)
- Creep-fatigue interaction (1)
- Crystal Defects (1)
- Crystal Plasticity Modelling (1)
- Crystalline defects (1)
- Cyclic loading (1)
- Cyclic oxidation (1)
- DED-L (1)
- DIN (1)
- Damage Behavior (1)
- Damage behavior (1)
- Data Exchange (1)
- Data Integration (1)
- Data Mapping (1)
- Data format (1)
- Data infrastructures (1)
- Data linking (1)
- Data pipeline concept (1)
- Data storage (1)
- Data structure (1)
- Datenfusion (1)
- Datenökosystem (1)
- Defects (1)
- Defects engineering (1)
- Defects phase diagram (1)
- Defects thermodynamics (1)
- Deformation (1)
- Deformation mechanisms (1)
- Demonstrators (1)
- Die casting (1)
- Differential scanning calorimetry (DSC) (1)
- Digital Transformation (1)
- Digital image correlation (1)
- Digital representations (1)
- Digital workflow (1)
- Digital workflows (1)
- Digitalizations (1)
- Domain Ontology Development (1)
- Dwell periods (1)
- Dwell times (1)
- Dwell-Fatigue (1)
- EN AW 2618A (1)
- EN AW 2618A a (1)
- Eigenschaften (1)
- Eigenspannung (1)
- Elastic constants (1)
- Elastic energy (1)
- Elctronic Lab Notebook (1)
- Electrical resistance (1)
- Electrochemical dressing (1)
- Electropolishing (1)
- Elektronisches Laborbuch (ELN) (1)
- Elektrotechnische Grundlagen (1)
- Energiewende (1)
- Energy transition (1)
- Entwicklung (1)
- Environment (1)
- Environmental Stress Cracking (1)
- Environmental stress cracking (ESC) (1)
- Ermüdung (1)
- Expanding cavity model (1)
- FAIR Data (1)
- FAIR data. (1)
- FAIR principles (1)
- FAIR research data management (1)
- FNCT (1)
- Fatigue crack propagation (1)
- Fatigue damage (1)
- Ferritic–martensitic steel (1)
- Finite elmenet simulation (1)
- Finite-Elemente-Methode (1)
- Fourier series (1)
- Full notch creep test (FNCT) (1)
- Full-Notch Creep Test (1)
- Full-notch creep test (1)
- Fullerite (1)
- GMR (1)
- GMR sensors (1)
- Gefügeuntersuchung (1)
- Gefügte Nickelbasislegierungen (1)
- General Chemistry (1)
- General Computer Science (1)
- General Engineering (1)
- General Materials Science (1)
- Glas (1)
- Gleichgewicht (1)
- Grade S960QL steel (1)
- Gradient-enhanced fatigue model (1)
- Grain Boundary Phase Diagram (1)
- Grain Boundary Segregation (1)
- Grain Boundary Spinodal (1)
- Grain boundaries (1)
- Grain boundary (1)
- Grain boundary phase diagram (1)
- Grain boundary thermodynamics (1)
- Graphic design (1)
- Grundlagen des Maschinenbaus (1)
- HCF (1)
- Hardness test (1)
- Heat Treatment (1)
- Hertzian cracks (1)
- High cycle fatigue (1)
- High entropy alloy (1)
- High entropy alloys (1)
- High-Entropy Alloys (1)
- High-entropy alloys (1)
- High-strength steel (1)
- High-temperature corrosion (1)
- Hochentropie-Legierung (1)
- Hochtemperatur (1)
- Hochtemperaturermüdung (1)
- Honing (1)
- Honing Stone (1)
- Hot isostatic pressing (HIP) (1)
- IN718 (1)
- In-Situ Testing (1)
- In-situ Process Monitoring (1)
- In-situ SEM micro shear deformation (1)
- In-situ diffraction (1)
- Inconel 718 (1)
- Incremental lifetime models (1)
- Indentation (1)
- Industrial and Manufacturing Engineering (1)
- Informationstechnische Grundlagen (1)
- Interfacial Spinodal (1)
- Interfacial anisotropy (1)
- Interfacial free energy (1)
- Intermetallische FeAl-Legierungen (1)
- Interoperable (1)
- Inverse ostwald ripening (1)
- Investment casting (1)
- Irregular topography (1)
- Isostatic hot pressing (HIP) (1)
- Kennwertermittlung (1)
- Keramik (1)
- Knowledge Graphs (1)
- Knowledge graphs (1)
- Knowledge representation (1)
- Korrosion (1)
- Kreislaufwirtschaft (1)
- Kriechermüdung (1)
- Kristallsystem (1)
- Kupfer (1)
- L-PBF 316L (1)
- LMD (1)
- Laser Poeder Bed Fusion (1)
- Laser Powder Bed Fusion (LPBF) (1)
- Laser Scanning Microscopy (1)
- Laser beam melting (LBM) (1)
- Laser powder-based directed energy deposition (1)
- Laser scanning microscopy (LSM) (1)
- Laser-Pulverbettschmelzen (1)
- Layering misalignment (1)
- Lebensdauervorhersage (1)
- Legierung mit komplexer Zusammensetzung (1)
- Life cycle (1)
- Lifetime prediction (1)
- Linked open data (1)
- Long-term aging (1)
- Low Cycle Fatigue (LCF) (1)
- Low carbon steel (1)
- Low strain (1)
- Low-Cycle Fatigue (LCF) (1)
- Low-Cycle-Fatigue (1)
- Low-cycle fatigue (1)
- Low-cycle fatigue. (1)
- Low-cycle-fatigue behaviour (1)
- Lötverbindung (1)
- Machine learning (1)
- Magnetic domain distribution (1)
- Magnetic domains (1)
- Magnetic stray field (1)
- Magnetic stray fields (1)
- Magnetische Domänen (1)
- Magnetoelastic effect (1)
- Magnetoelastischer Effekt (1)
- Magnetomechanical effect (1)
- Martensitic transformation (1)
- Mat-o-lab (1)
- Material Life Cycle (1)
- Material degradation (1)
- Material modeling (1)
- MaterialDigital (1)
- Materialcharakterisierung (1)
- Materialentwicklung (1)
- Materialkreislauf (1)
- Materialprüfung (1)
- Materials Chemistry (1)
- Materials Science (1)
- Materials Testing (1)
- Materials and Processes Data Reusability (1)
- Materials informatics (1)
- Materials science and engineering (1)
- Materials testing (1)
- Mathematisch-naturwissenschaftliche Grundlagen (1)
- Mechanical Engineering (1)
- Mechanical Properties (1)
- Mechanical anisotropy (1)
- Mechanics of Materials (1)
- Mechanisches Verhalten (1)
- Mechanistic Modelling (1)
- Mehrachsige Verformung (1)
- Mehrskalenmodell (1)
- Metal Magnetic Memory (1)
- Metal magnetic memory (1)
- Metall (1)
- Metals and Alloys (1)
- Micro computed tomography (1)
- Microstructural evolution (1)
- Microstructure analysis (1)
- Microstructure characterisation (1)
- Microstructure modification (1)
- Mid-Level Ontology for MSE (1)
- Mikro-Computertomographie (1)
- Mikrostrukturentwicklung (1)
- Mikrostrukturuntersuchung (1)
- Miniature specimens (1)
- Misfitting precipitate (1)
- Missing acknowledgment (1)
- Model (1)
- Modeling (1)
- Modell (1)
- Molecular dynamics (1)
- NFDI-MatWerk (1)
- NIST (1)
- Nanocrystalline alloys (1)
- Nanoindentation (1)
- NiTi (1)
- Nickel alloys (1)
- Nickel-base superalloy (1)
- Nimonic 75 (1)
- Non-destructive Materials (1)
- Non-destructive testing (1)
- Notch (1)
- Number density (1)
- Numerische Simulation (1)
- Ordering (1)
- Orowan Mechanism (1)
- Overaging (1)
- P92 steels (1)
- PE-HD (1)
- Phase Diagram (1)
- Phase field crystal (1)
- Phase field method (1)
- Phase field model (1)
- Phase field simulation (1)
- Phase stability (1)
- Phase-field model (1)
- Plasticity (1)
- Platform Material Digital (1)
- Platform Material Digital (PMD) (1)
- Platform MaterialDigital (1)
- Platform MaterialDigital (PMD) (1)
- Plattform Material Digital (PMD) (1)
- Polyethylene (1)
- Pore (1)
- Pores (1)
- Porosity (1)
- Positron annihilation spectroscopy (1)
- Power plant (1)
- Precipitate shape (1)
- Precipitates (1)
- Precipitation Analysis (1)
- Precipitation hardening (1)
- Process development (1)
- Quantitative Precipitation Analysis (1)
- Quantitative image analysis (1)
- Radii distribution (1)
- Rafting (1)
- Reference Data (1)
- Reference Dataset (1)
- Reference material BCR-425 (1)
- Referenzmaterial (1)
- Referenzorganismus (1)
- Referenzverfahren (1)
- Reheating (1)
- Relaxation fatigue (1)
- Relaxation tests (1)
- Resonance testing (1)
- Reusability (1)
- Reusable data (1)
- Rissausbreitung (1)
- Risse (1)
- Rissform (1)
- Rissfortschritt (1)
- Rissverlauf (1)
- SEN-Probe (1)
- Safety (1)
- Schadenskunde (1)
- Selective laser melting (1)
- Selective laser melting (SLM) (1)
- Semantic Data Integration (1)
- Semantic Interioerability (1)
- Semantic Web technologies (1)
- Semantic data integration (1)
- Semantic interoperability (1)
- Semantic structuring (1)
- Semantische Daten (1)
- Shape memory alloy (1)
- Shape memory alloys (1)
- Shear testing (1)
- Simulationsgestützte Gießkonzepte (1)
- Single crystal superalloys (1)
- Single-crystal (1)
- Slow crack growth (SCG) (1)
- Solidification (1)
- Spinodal Decomposition (1)
- Spinodal decomposition (1)
- Standardisation (1)
- Strain difference (1)
- Strain energy (1)
- Strength (1)
- Stress-strain behavior (1)
- Stress-strain-behavior (1)
- Structured Data (1)
- Struktur (1)
- Superalloy single crystals (1)
- T1 precipitate (1)
- TIG-welding (1)
- TMF experiments (1)
- Temperature dependence (1)
- Tempered martensite ferritic steels (1)
- Tensile properties (1)
- Tensile strength (1)
- Tensile stress relaxation (1)
- Tensile stress relaxation testing (1)
- Tensile tests (1)
- Texture (1)
- Thermal Cycling (1)
- Thermal expansion (1)
- Thermo-mechanical fatigue (1)
- Thermographie (1)
- Thermomechanical Fatigue (TMF) (1)
- Thermomechanische Ermüdung (1)
- Thermophysikalische Eigenschaften (1)
- Thesaurus (1)
- Thickening (1)
- Tools (1)
- Topography (1)
- Transmission electron microscopy (TEM) (1)
- Tribologie (1)
- Ungleichgewicht (1)
- Unlegierter Baustahl (1)
- Vacancies (1)
- Verbundwerkstoff (1)
- Vernetzung (1)
- Vickers Hardness (1)
- Virtueller Materialdatenraum (1)
- Viskoplastisch (1)
- Visual ontology development (1)
- Vocabulary providers (1)
- Volume fraction (1)
- Werkstoffauswahl (1)
- Werkstoffkennwerte (1)
- Werkstoffmechanische Prüfung (1)
- Werkstoffprüfung (1)
- Workshop (1)
- X-ray computed tomography (CT) (1)
- Young`s modulus (1)
- Young´s modulus (1)
- Zerstörungsfreie Prüfung (1)
- Zugversuchsontologie (1)
- coarsening (1)
- hardness (1)
- microstructural changes (1)
- γ″ phase (1)
- θ′ phase (1)
- θ′-(Al2Cu) precipitate phase (1)
Organisationseinheit der BAM
- 5.2 Metallische Hochtemperaturwerkstoffe (277) (entfernen)
Paper des Monats
- ja (1)
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.
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.
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.
Abstract While classically used to visualise the magnetic microstructure of functional materials (e.g., for magnetic applications), in this study, the Bitter technique was applied for the first time to visualise macroscopic deformation gradients in a polycrystalline low-carbon steel. Spherical indentation was chosen to produce a multiaxial elastic–plastic deformation state. After removing the residual imprint, the Bitter technique was applied, and macroscopic contrast differences were captured in optical microscopy. To verify this novel characterisation technique, characteristic “hemispherical” deformation zones evolving during indentation were identified using an analytical model from the field of contact mechanics. In addition, near-surface residual stresses were determined experimentally using synchrotron radiation diffraction. It is established that the magnetic domain distribution contrast provides deformation-related information: regions of different domain wall densities correspond to different “hemispherical” deformation zones (i.e., to hydrostatic core, plastic zone and elastic zone, respectively). Moreover, the transitions between these three zones correlate with characteristic features of the residual stress profiles (sign changes in the radial and local extrema in the hoop stress). These results indicate the potential of magnetic domain distribution imaging: visualising macroscopic deformation gradients in fine-grained ferromagnetic material with a significantly improved spatial resolution as compared to integral, mean value-based measurement methods.
The sound numerical prediction of welding-induced thermal stresses, residual stresses, and distortions strongly depends on the accurate description of a welded material’s thermomechanical deformation behaviour. In this work, we provide experimental data on the viscoplastic deformation behaviour of a grade-s960ql steel up to a temperature of 1000 ◦C. In addition, a multi-phase viscoplastic material model is proposed, which accounts for the experimentally observed isothermal deformation behaviour of grade-s960ql steel base and austenitised material, as well as for athermal contributions that originate from solid-state phase transformations. The multi-phase viscoplastic and a classic rateindependent isotropic hardening material model were applied in the numerical simulations of both-ends-fixed bar Satoh tests and a single-pass gas metal arc weld. The influence of material modelling choices on the agreement between numerical simulation and experimental results is discussed, and recommendations for further work are given.
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.
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.