| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
High and Moderate Temperature Deformation Modeling of High Entropy Alloys |
| Author(s) |
Charles C. Xu, Gopal Viswanathan, Yunzhi Wang, Stephen Niezgoda |
| On-Site Speaker (Planned) |
Charles C. Xu |
| Abstract Scope |
Al, Mo, Nb, Ta, Ti, Zr High-entropy alloys can form a superalloy-like microstructure with a B2 matrix and coherent bcc precipitates. Many members of this family have good high temperature strength but poor ductility below 600 °C due to coarse intermetallic grain boundary particles, but some composition show excellent mechanical properties. In this talk we explore the high- and moderate temperature deformation behavior of these alloys through crystal plasticity simulations with dislocation utilizing a dislocation based constitutive laws. Specifically, we explore the composite B2/bcc microstructure response and homogenization to calibrate effective single crystal grain scale constitutive response. These effective properties are then integrated into polycrystalline models to explore the effects of texture and grain boundary precipitates on the resulting response of the polycrystalline aggregate. Calibration data is obtained from a combination of TEM/SEM characterization, micro phase-field simulation, nanoindentation and small-scale mechanical testing. |
| Proceedings Inclusion? |
Planned: |