| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Low-temperature Deforamtion in High-entropy Alloys |
| Author(s) |
M. Naeem, Haiyan He, Stefanus Harjo, Takuro Kawasak, Xun-Li Wang |
| On-Site Speaker (Planned) |
Xun-Li Wang |
| Abstract Scope |
It is amazing that multi-component high entropy alloys (HEAs) can form a single-phase solid-solution with a simple FCC (face-centered-cubic) structure. Due to the favorable crystal structure and the metastable FCC phase, several additional deformation mechanisms become available in FCC HEAs. In situ loading study with neutron diffraction has proven to be a powerful approach to characterize the activation of different deformation modes and their interactions at low temperatures. Measurements at 15 K in CrCoNi-based HEAs have revealed a myriad of deformation mechanisms, including stacking fault, twinning, phase transformation, and serration, in addition to dislocation slip. The in situ neutron diffraction data are used to estimate the contributions of different deformation modes to the strain hardening. It is shown that the cooperation of these different deformation mechanisms led to the extremely large ductility at low temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Phase Transformations |