| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
|
| Presentation Title |
Neutron irradiation induced local chemical ordering in CrFeMnNi and CrFeMnNiTiAl compositionally complex alloys |
| Author(s) |
Nathan Curtis, Sohail Shah, Kaustubh Bawane, Fei Teng, Tiankai Yao, Mukesh Bachhav, Haiming Wen, Adrien Couet |
| On-Site Speaker (Planned) |
Nathan Curtis |
| Abstract Scope |
Compositionally complex alloys (CCAs) have garnered interest for structural nuclear applications chiefly due to their reported enhanced irradiation tolerance. Recent studies, however, suggest the microstructural evolution of CCAs in reactor environments is not adequately captured by high damage rate heavy-ion irradiations. Notably, CCAs’ reported single-phase solid solution stability under heavy ion irradiation is inconsistent in low damage rate ion irradiation studies. To observe the irradiation damage response of CCAs at reactor-relevant dose rates, the single-phase CrFeMnNi and precipitate-forming CrFeMnNiTiAl have been irradiated at the Advanced Test Reactor up to 6.5 displacements per atom at 395 and 579 °C. Thermally aged unirradiated samples were also studied to deconvolve aging and irradiation effects on microstructural development. Transmission electron microscopy and atom probe tomography techniques were employed to characterize irradiation-induced defect formation and local chemical ordering in both systems, and the effects of short range order on CCAs will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Entropy Alloys, Characterization |