About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithm Development in Materials Science and Engineering
|
Presentation Title |
A Quantitative Phase-field Model for Study of Shape Memory Behavior and Elastocaloric Effect in CuAlBe |
Author(s) |
Cheikh Cissé, Mohsen Asle Zaeem |
On-Site Speaker (Planned) |
Cheikh Cissé |
Abstract Scope |
We are presenting a quantitative non-isothermal elastoplastic phase-field model for shape memory alloys. It is fully thermo-mechanically coupled considering the effects of temperature-dependent properties, latent heat, grain boundaries, and asymmetric transformation and plasticity. The asymmetric plasticity formulation is added to this model in a more realistic way than the TDGL-like diffusive plasticity which is also computationally more efficient than the crystal plasticity. The proposed model is the first of its kind to capture, beyond shape memory effect and pseudoplasticity, the stress-assisted two-way memory effect, the formation of internal loop during thermal cycling, and thermomechanical training. Comparison between tension and compression demonstrates the capability of this model to account for nonsymmetrical transformation and plastic responses of shape memory alloys. The elastocaloric effect related to the heat release and absorption during phase transformation is simulated and the microstructure correlated with the temperature distribution. Ultimately, the elastocaloric performance in functional fatigue is assessed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Computational Materials Science & Engineering, |