|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
||Neutron Irradiation Effects on Mechanical Anisotropy in Alloy 625
||Caleb Clement, Megha Dubey, Yu Lu, Sheng Cheng, Donna P Guillen, David Gandy, Janelle Wharry
|On-Site Speaker (Planned)
The objective of this talk is to understand the effects of neutron irradiation on grain orientation mechanical anisotropy of Ni-based Alloy 625 fabricated by powder metallurgy with hot isostatic pressing (PM-HIP) as compared to traditional forging. Alloys can exhibit considerable orientation anisotropy of yield strength, but it is not well understood how irradiation affects this anisotropy. In this study, Alloy 625 was neutron irradiated in the Advanced Test Reactor to 1 displacement per atom (dpa) at 300°C. Grain structure of irradiated and as-received specimens were observed via electron backscatter diffraction (EBSD), and targeted nanoindentation on , , and  grains was performed. The deformation microstructures were then studied via bright field scanning transmission electron microscopy (STEM). The PM-HIP variant shows less orientation anisotropy in nanoindentation yield strength as compared to its forged counterpart. The deformation microstructures are discussed in the context of Schmid factor and twinning versus slip localization.
||Powder Materials, Nuclear Materials, Mechanical Properties