About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
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| Presentation Title |
On the Damage Tolerance of TiZrNbHfTa Refractory High-Entropy Alloys |
| Author(s) |
Bernd Gludovatz, Michael Moschetti, William Carpenter, Moses J Paul, Alan Xu, Dhriti Bhattacharyya, Jean-Philippe Couzinié, Anton Hohenwarter, Easo P George, Jamie J Kruzic |
| On-Site Speaker (Planned) |
Bernd Gludovatz |
| Abstract Scope |
The BCC-structured TiZrNbHfTa HEA exhibits excellent mechanical and reasonable corro-sion-resistance properties making the alloy a candidate material for use in a nuclear reactor. Furthermore, our recent work has shown that He2+-ion irradiation of the alloy results in low radiation-induced hardening compared to common materials such as SS316, and in-creased strength without a loss of ductility, indicating high irradiation-damage tolerance. However, the TiZrNbHfTa HEA is thermodynamically unstable, decomposing into multi-ple BCC and HCP phases at temperatures between 500-900 °C. Here, we present our work on establishing the irradiation-damage tolerance of TiZrNbHfTa over several thermal treatments and subsequent phase compositions, using in situ micromechanical characteriza-tion techniques and compare both strength and fracture toughness of nanocrystalline and irradiated material with the mechanical performance of unirradiated, coarse-grained mate-rial. Finally, we demonstrate a potential pathway to the design of new, damage-tolerant high-entropy alloys for nuclear applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |