| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification of Nuclear Materials Integrating Experiments, Modeling, and Theories
|
| Presentation Title |
Nanoprecipitates to Enhance Radiation Tolerance in High-Entropy Alloys |
| Author(s) |
Boopathy Kombaiah, Yufan Zhou, Ke Jin, Anus Manzoor, Jonathan Poplawsky, Jeffrey Aguiar, Hongbin Bei, Dilpuneet Aidhy, Philip Edmondson, Sriswaroop Dasari, Yanwen Zhang |
| On-Site Speaker (Planned) |
Sriswaroop Dasari |
| Abstract Scope |
In this study, we developed a high entropy alloy (HEA), NiCoFeCrCu0.12 containing a high density of Cu-rich nanoprecipitates distributed in the solid solution matrix. The Cu-added HEA shows excellent void swelling resistance and negligible radiation-induced hardening upon irradiation to higher than 100 dpa dose. The void swelling resistance of the alloy is measured to be significantly better than NiCoFeCr and austenitic stainless steels. Density functional theory simulations predict lower vacancy and interstitial formation energies at the coherent interfaces between Cu-rich nanoprecipitates and the HEA matrix. Consequently, the alloy maintained a high sink strength achieved via nanoprecipitates and the coherent interface with the matrix at a high radiation dose (∼50 dpa). From our experiments and simulations, the effective recombination of radiation-produced vacancies and interstitials at the coherent interfaces of the nanoprecipitates is suggested to be the critical mechanism responsible for the radiation tolerance of the alloy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, High-Entropy Alloys, Characterization |