About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale VIII
|
| Presentation Title |
Effect of helium bubble on mechanical properties of CoCrCuFeNi high-entropy alloys with varying composition |
| Author(s) |
Chan Hyuk Moon, Taeyoung Yoon |
| On-Site Speaker (Planned) |
Chan Hyuk Moon |
| Abstract Scope |
High-entropy alloys (HEAs) have received attention as radiation-resistant materials due to their sluggish diffusion and enhanced defect recombination. However, the effects of irradiation-induced helium (He) bubbles on the mechanical properties of the representative CoCrCuFeNi alloy have been insufficiently studied. In this work, we inserted He bubbles at identical locations into models with different elemental compositions and performed high-temperature compression simulations. We analyzed stress–strain behavior, dislocation density, and local strain localization. Additionally, molecular dynamics simulations were conducted on models containing pre-existing cracks to investigate the influence of He bubbles on crack propagation. The results quantitatively revealed how compositional variation affects He-induced damage behavior. Based on the findings, we proposed optimal composition strategies for nuclear structural applications. This study confirmed that He bubbles induce distinct mechanical responses depending on alloy composition and offers valuable insights for the design of radiation-tolerant high-entropy alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Nuclear Materials, Mechanical Properties |