About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
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| Symposium
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Enabling Nuclear Materials Innovation via the Nuclear Science User Facility Capabilities
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| Presentation Title |
Mechanical and Microstructural Study of Neutron Irradiated Refractory High Entropy Alloys |
| Author(s) |
Kyle Reese Holloway, Phillip Harris, Anilas Karimpilakkal, Jason Schulthess, Joseph Newkirk, Wen Jiang, Lingfeng He |
| On-Site Speaker (Planned) |
Kyle Reese Holloway |
| Abstract Scope |
Generation IV nuclear reactors require structural materials capable of withstanding high temperatures, corrosion, and radiation damage. Refractory high entropy alloys (RHEAs) show potential due to their resistance to irradiation damage, reduced void swelling, and microstructural stability. However, most previous studies have focused on thin films and ion irradiation, leaving the neutron irradiation response of bulk RHEAs largely unexplored. In this study, bulk MoNbTi-based RHEAs with Zr and ZrV additions were fabricated via spark plasma sintering and irradiated in Advanced Test Reactor at Idaho National Laboratory. The alloys were evaluated through tensile testing, micro- and nano-indentation, and microstructural characterization. Both pristine and irradiated specimens’ tensile tests exhibited brittle behavior due to the as-built heterogenous microstructure. Microstructural characterization revealed the presence of intermetallic laves phases in all alloys, with Ti-rich precipitates in MoNbTi and Mo-rich precipitates in MoNbTiZrV. These findings provide new insights into the microstructure-property relationships of neutron-irradiated bulk RHEAs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Nuclear Materials, Characterization |