About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
J-106: Bridge Martensite Phase Transformation through Microbands for Superior Dynamic Mechanical Properties in a Metastable High-entropy Alloy |
| Author(s) |
Aomin Huang |
| On-Site Speaker (Planned) |
Aomin Huang |
| Abstract Scope |
Multi-principal elements alloys with more than five components, namely high-entropy alloys (HEAs) have been extensively studied due to their excellent mechanical properties as promising structural materials. As novel metallic alloys, excellent performances have been reported in recent studies. However, most emphasis has been placed to study their mechanical properties subjected to low strain-rate which leads to insufficient understanding of their properties at high strain-rate. In the present study, varying strain rates and temperatures of compression tests are performed on split-Hopkinson pressure bar (SHPB) system to establish their microstructure evolution and deformation mechanisms. We report on a new strategy to improve the dynamic mechanical properties of coarse-grained HEAs by introducing microbands as a bridge to initiate the stress-induced martensitic transformation (SIMT). This alloy exhibited yield stress over 1.2 GPa with good deformability under high-strain-rate loading. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Phase Transformations |