About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification Methods for Nuclear Reactor Structural Materials
|
| Presentation Title |
In-situ and ex-situ irradiation and characterization of 3d transition metal high entropy alloys |
| Author(s) |
Boopathy Kombaiah, Anshul Kamboj, Ian Steigerwald, Sriswaroop Dasari, Robby Renfrow, Hangyu Li, Jonathan Poplawsky, Mukesh Bachhav, Dilpuneet Aidhy, Marat Khafizov, Kevin Field, Philip Edmondson, Yanwen Zhang |
| On-Site Speaker (Planned) |
Boopathy Kombaiah |
| Abstract Scope |
High-entropy alloys (HEAs) are emerging candidate materials for structural applications in advanced nuclear concepts due to their good radiation performance, mechanical properties, and corrosion properties. However, challenges like radiation-induced phase instability and void swelling at high doses in some HEAs exist. In this talk, we will discuss the effects of adding Pd, Al, or Cu in low concentrations on the radiation performance of NiCoFeCr model HEA studied using ex situ and in situ irradiation experiments. The microstructural evolution upon irradiation i.e., formation of dislocation networks, radiation induced segregation and precipitation, and void formation will be presented. Defect analysis from a large volume of in-situ TEM irradiation image data aided by machine learning routines will be discussed. While nanoprecipitates formed in NiCoFeCr-3Cu were found to drastically improve its resistance to radiation-induced swelling and hardening even at high doses, no significant effect of Pd and Al on the radiation performance was noted. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Nuclear Materials, Characterization |