About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
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| Symposium
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Physical Thermo-Mechanical Simulation: Laboratory Advances and In-Situ Diffraction Methods
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| Presentation Title |
In situ microstructural evolution of refractory high-entropy alloys from sintering or high-pressure torsion by elemental powder mixture for the future of nuclear engineering |
| Author(s) |
Madara Shashikala Garumuni Arachchige, Joshua Day Norton, Laxman Bhatta, Benjamin Roush, Saurabh Kabra, Andrew Chihpin Chuang, Dunji Yu, Megumi Kawasaki, Klaus-Dieter Liss |
| On-Site Speaker (Planned) |
Madara Shashikala Garumuni Arachchige |
| Abstract Scope |
Refractory high-entropy alloys (RHEA) have been identified as promising materials for the future of nuclear engineering because they exhibit enhanced properties under radiation damage and extreme temperatures. This study focuses on phase formation and microstructure evolution in RHEA upon heating, which were synthesized via sintering or high-pressure torsion. High-energy X-ray and neutron diffraction are used to investigate the thermal evolution of phases and microstructural features under in situ heating conditions. Furthermore, this study allows direct comparison between sintering and HPT applied to the same RHEA composition, as the two processes are expected to produce fundamentally different microstructures. Sintering results in a coarser, more heterogeneous solid mixture, whereas HPT produces ultrafine nanostructured grains, high densities of dislocations, and texture due to plastic deformation, leading to relaxation such as recrystallization upon heating. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Phase Transformations |