|About this Abstract
||MS&T21: Materials Science & Technology
||Probing Defect Properties and Behavior under Mechanical Deformation and Extreme Conditions
||Mechanical and Microstructural Responses of Severe-plastic Deformed High Entropy Alloys under Irradiation
||Spencer Doran, Tracey Spoerer, Megumi Kawasaki, Youxing Chen, Di Chen, Tianyi Chen
|On-Site Speaker (Planned)
High Entropy Alloys (HEAs) have received increased attention due to their unique properties and resilience in harsh environments such as next generation nuclear reactors. High-pressure torsion (HPT) introduces nanograins in HEAs that may further enhance mechanical strength. The stability of the nanograins and their potential defect sink effects in severely deformed HEAs are not well known and the subject of this study. Equiatomic CoCrFeNiMn samples are severely deformed by HPT and then irradiated at 100 peak displacements per atom (DPA) at 500 °C with 3.4MeV nickel ions to a fluence of 1.0919×10^17 cm-2. Material properties of the CoCrFeNiMn HEA are investigated using nanoindentation, electron microscopes and the Surface Acoustic Wave (SAW) characterization techniques. This study aims to demonstrate the importance of grain size on defect evolution in HEAs in high radiation environments as well as how HPT-introduced mechanical properties and microstructures are changed by these environments.