| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Ultrahigh Temperature Tensile Deformation Mechanisms of Multi-Principal Element Alloys |
| Author(s) |
Michael Patullo, Syed I. A. Jalali, Sharon Park, Leah Mills, David Beaudry, Mitra Taheri, Tresa Pollock, Kevin Hemker |
| On-Site Speaker (Planned) |
Michael Patullo |
| Abstract Scope |
Refractory alloys, including refractory multi-principal element alloys (RMPEAs), have immense potential for use at ultrahigh temperatures and in extreme environments required for energy-efficient power generation, hypersonic flight, and space access. Advancements in the alloy design of single and multi-phase RMPEAs hold great promise, but the current scarcity of ultrahigh temperature tensile tests and the limited understanding of their corresponding mechanical behavior is a serious impediment to their widespread use. Tensile experiments on a selection of RMPEAs will be presented to describe their performance above 1500°C, and the deformation mechanisms that underpin their processing-structure-properties relations are discussed. Slow and variable strain rate tests will play a key role in mechanism elucidation, especially in how they may differ from lower temperature behavior. Preliminary investigations show evidence of dynamic recrystallization coupled with significant grain boundary sliding, which is more pronounced at higher temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, High-Temperature Materials |