| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| 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 corrosion-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 increased strength without a loss of ductility, indicating high irradiation-damage tolerance. However, the TiZrNbHfTa HEA is thermodynamically unstable, decomposing into multiple 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 characterization techniques and compare both strength and fracture toughness of nanocrystalline and irradiated material with the mechanical performance of unirradiated, coarse-grained material. 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, Nuclear Materials |