| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Tunability of Deformation Mechanisms through Integration of Compositional and Microstructural Domains |
| Author(s) |
Rajiv S. Mishra |
| On-Site Speaker (Planned) |
Rajiv S. Mishra |
| Abstract Scope |
This overview presentation focuses on opportunities for tunable performance by manipulating deformation mechanisms in high entropy alloys (HEAs) or concentrated alloys. In a recent review, we highlighted an approach that integrates compositional and microstructural domains. This approach will be presented with an emphasis on metastability engineering. The enhanced metastability triggers a combination of shear induced phase transformation and twinning, thereby expanding beyond the slip based mechanisms. The emerging metastable HEAs give greater flexibility for tailoring transformation-induced plasticity (TRIP) and twinning induced plasticity (TWIP). For TRIP HEAs, the ductility can be extended to as high as 50% while maintaining a strength exceeding 1 GPa. Concurrent phase transformation at the crack tip has been shown to push the fatigue endurance limit. Hierarchical activation of micromechanisms in these highly metastable HEAs provide excellent opportunities for enhanced structural performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |