About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Behavior of Nuclear Reactor Materials and Components III
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Presentation Title |
Structure-property Evolution of PM-HIP Fabricated Ni-Alloys 625 and 690 Neutron Irradiated to 1 and 3dpa |
Author(s) |
Caleb Clement, Yu Lu, Sheng Cheng, Megha Dubey, Sowmya Panuganti, Yangyang Zhao, Katelyn Wheeler, Donna Guillen, David Gandy, Janelle Wharry |
On-Site Speaker (Planned) |
Caleb Clement |
Abstract Scope |
The objective of this talk is to understand irradiation dose effects on the microstructure and mechanical properties of Alloy 625 (Ni-23Cr-8Mo) and Alloy 690 (Ni-31Cr-10Fe) fabricated using powder metallurgy with hot isostatic pressing (PM-HIP). PM-HIP presents an attractive alternative to traditional manufacturing methods for nuclear applications; however its irradiation performance is not yet understood. Alloys 625 and 690 fabricated with PM-HIP and by forging were neutron irradiated to 1 and 3 displacements per atom (dpa) at 400ºC in the Advanced Test Reactor. Post-irradiation transmission electron microscopy and atom probe tomography reveal relatively consistent dislocation loop and nanoprecipitate evolution across the PM-HIP and forged materials, with the size of these defects scaling with dose. Nanoindentation and tensile testing reveal that Orowan strengthening can accurately capture structure-property relationships of both alloys at both doses. These results further our understanding of irradiation effects on PM-HIP alloys towards nuclear code-qualification. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Characterization, Mechanical Properties |