| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Crystal Plasticity Modeling of In-Phase/Out-of-Phase Thermo-Mechanical Loading in a High Temperature Shape Memory Alloy |
| Author(s) |
Adrien R. Cassagne, Dimitris C Lagoudas, Jean Briac Le Graverend |
| On-Site Speaker (Planned) |
Adrien R. Cassagne |
| Abstract Scope |
A Crystal Plasticity approach was adopted to model the mechanical behavior of a polycrystalline High Temperature Shape Memory Alloy (HTSMA). A thermodynamics approach provided expression for austenite-martensite transformation and transformation induced plasticity strains. Rate dependent deformation is featured through a viscoplastic contribution to the total strain. Computations use a full field approach and are compared to experimental results obtained for simultaneous stress and thermal cycling (in phase or out of phase). A recently developed scale transition rule for HTSMA is then implemented to improve the representation of macro-meso scale relationships in the context of a mean field approach. This transition rule adds both plastic and phase transforming interaction between grains to improve depiction of intergranular hardening phenomenon. Mean field allows to consider an average behavior due to the random orientation of the grains. A comparison of performances is made between full field and mean field regarding the obtained behavior. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, High-Temperature Materials, Phase Transformations |