| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
|
| Presentation Title |
In Situ Microstructural Evolution in Face-centered Cubic Compositionally Complex Alloys under Dual-beam Heavy-ion Irradiation |
| Author(s) |
Calvin A. Parkin, Michael Moorehead, Kumar Sridharan, Weiying Chen, Meimei Li, Adrien Couet |
| On-Site Speaker (Planned) |
Calvin A. Parkin |
| Abstract Scope |
Compositionally complex alloys (CCAs) with a base matrix of four or more principal alloying elements may resist radiation degradation by void swelling due to unique energy and mass transport properties. Because the steady-state swelling rate of austenitic alloys is consistent after voids nucleate (1%/dpa), it is essential to study the effect of composition on void nucleation in a void-stabilizing He environment, which typically is determined by the microstructural evolution and level of vacancy supersaturation. Heavy-ion irradiation of two CCAs, Cr18Fe35Mn15Ni35 and Cr18Fe27Mn27Ni28, was performed at the IVEM-Tandem facility at ANL using 1 MeV Kr++ and 12 keV He+ co-implantation to doses up to 10 dpa and 0.5% He/dpa at temperatures of 773K and 873K. 2-beam TEM allowed determination of the nucleation dose and characterization of the microstructural evolution. Results are compared to less compositionally complex single-phase FCC materials and discussed alongside single-beam high-temperature in situ and high-dpa ex situ irradiations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Nuclear Materials, Other |