| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Testing to Understand the Long Term Performance of High Temperature Materials
|
| Presentation Title |
Effect of Compositional Complexity on the Creep of High Entropy Alloys |
| Author(s) |
Tzu-Yi Chang, Sriswaroop Dasari, Tianyi Chen, Boopathy Kombaiah |
| On-Site Speaker (Planned) |
Tzu-Yi Chang |
| Abstract Scope |
High entropy alloys (HEAs) have attracted considerable attention due to their attractive properties such as good fracture resistance, corrosion resistance, and radiation resistance. The superior properties of HEAs are attributed to their sluggish diffusion and lattice distortion arising from their multi-principal elements compositional space. However, recent diffusion studies have shown that the addition of more than three elements would have no significant effect on the atomic diffusivities, questioning the “core effect” of sluggish diffusion in HEAs. In this study, we use nanoindentation creep as a tool to understand the sluggish diffusion in HEAs by systematically studying the influence of the number of principal elements in HEAs on their creep behavior. The alloys studied include but are not limited to CoFeNi, CoCrFeNi, and CoCrFeMnNi. Indentation experiments were performed in force-controlled mode at different temperatures. The results are discussed in terms of creep strain, stress exponent and activation energy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |