| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Crystal Plastic Modeling of NbTaTiV Refractory High-entropy Alloy at Room Temperature |
| Author(s) |
Chuhao Liu, Chanho Lee, Xiaochuan Sun, Xiaodan Zhang, Shengyi Zhong, Ke An, Peter K. Liaw, Huamiao Wang |
| On-Site Speaker (Planned) |
Huamiao Wang |
| Abstract Scope |
The NbTaTiV refractory high entropy alloy (RHEA) has shown decent strength-plasticity combination, which outperforms majority of RHEAs with limited room temperature (RT) ductility. In order to reveal the micro-mechanism of its strengthening and creep at high temperature, we analyzed its macro- and micro-mechanical responses at different high temperatures using a self-consistent crystal plasticity model and in-situ neutron diffraction detection. Results demonstrated that large yield strength at 900 degree C attributes to the decreased temperature dependency of critical resolved shear stress of dominant {110}<11> slip system. Moreover, larger stress relaxation behavior could be observed at 900 degree C, while the relaxation magnitudes are moderate or non-obvious from RT to 700 degree C. The stress relaxation behavior is correlated to the strain rate sensitivity (SRS) which would affect the creep property at elevated temperatures. Our model has demonstrated that SRS of RHEAs is an important factor effecting their high-temperature applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, |