About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Advances in Multi-Principal Element Alloys V: Mechanical Behavior
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| Presentation Title |
Understanding Order-Disorder Phase Relations with Mechanical Properties in Refractory High-Entropy Alloys using In-situ Diffraction Techniques |
| Author(s) |
Nathan Daniel Grain, Jie Qi, Joseph Poon, Peter K. Liaw, Michael Widom, Xuesong Fan, Lia Amalia, Diego Ibarra Hoyos, Eric A. Lass |
| On-Site Speaker (Planned) |
Nathan Daniel Grain |
| Abstract Scope |
Refractory high-entropy alloys (RHEA) provide a possible route to improve beyond conventional high-temperature materials. Recent efforts in high-throughput machine learning have given rise to the prediction of RHEAs with excellent mechanical properties despite the large compositional space that they exist in. Four different compositions, Al10Hf20Nb22Ti33V15, Al15Hf20Nb32Ti28, Al20Hf24Nb29Ti27, and Al25Hf25Nb25Ti25, were investigated. These alloys showed disordered body-centered-cubic (BCC) and ordered BCC (B2) phases with the amount of the B2 phase being positively correlated to the atomic fraction of Al. In-situ neutron diffraction and synchrotron experiments were performed to better understand the room-temperature relationship between the phases present and the mechanical properties. Additionally, in-situ neutron diffraction measurements were conducted on Al10Hf20Nb22Ti33V15 during compression at high-temperature to create an in-depth understanding of the microstructural response under these conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, |