| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Significance of Grain Refinement on the Nanomechanical Behavior of Multi-Principal Alloys |
| Author(s) |
Dong-Hyun Lee, In-Chul Choi, Tianyi Chen, Jae-il Jang, Megumi Kawasaki |
| On-Site Speaker (Planned) |
Megumi Kawasaki |
| Abstract Scope |
Multi-principal alloys (MPAs) are a novel class of metallic materials that exhibit excellent mechanical properties across a wide range of temperatures as well as in hydrogen environments. The formation of nanostructures in various MPAs, i.e. CoCrFeNi and CoCrFeNiMn, has been shown to enhance mechanical and other properties compared to their coarse-grained counterparts. These enhancements include extreme strength without sacrificing ductility, achieved by modifying the nanomechanical deformation mechanisms. From an alloy development perspective, testing methods requiring small sample volumes are advantageous. This has led to the growing importance of the nanoindentation technique for studying nanostructured MPAs. By applying severe plastic deformation processes, particularly high-pressure torsion, which is highly effective in creating nanostructures, this study summarizes recent findings on the significance of grain refinement on the nanomechanical behavior of MPAs. Key aspects include the strength-grain size relationship, strain rate sensitivity, superplasticity, and the response by the ion irradiation effect. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Entropy Alloys, Characterization |