Abstract
The present paper reports the irradiation behavior of nanostructured NiCoCr medium entropy alloy enhanced by Y-Hf-O nanooxides and fine grains produced by powder metallurgy. Ion beam irradiation to a peak dose of 130 dpa at 580°C produced neither detectable void swelling nor irradiation-induced hardening, in contrast to significant void swelling and property degradation of single phase NiCoCr concentrated solid-solution alloy under the similar irradiation condition. The dispersed nanooxides and high density of grain boundaries act as defect sinks that effectively annihilate irradiation-induced interstitials and vacancies. Furthermore, high-density nanooxides maintain their crystalline structures and stabilize the grain boundaries during irradiation.
Original language | English |
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Article number | 153316 |
Journal | Journal of Nuclear Materials |
Volume | 557 |
DOIs | |
State | Published - Dec 15 2021 |
Funding
This work was supported as part of the Energy Dissipation to Defect Evolution (EDDE) Center, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences . Ion beam work was performed at the UT–ORNL Ion Beam Materials Laboratory located on the campus of the University of Tennessee–Knoxville . The TEM analysis was conducted in the Michigan Center for Material Characterization of the University of Michigan. This work was supported as part of the Energy Dissipation to Defect Evolution (EDDE) Center, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences. Ion beam work was performed at the UT?ORNL Ion Beam Materials Laboratory located on the campus of the University of Tennessee?Knoxville. The TEM analysis was conducted in the Michigan Center for Material Characterization of the University of Michigan.
Funders | Funder number |
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UT?ORNL Ion Beam Materials Laboratory | |
University of Tennessee?Knoxville | |
U.S. Department of Energy | |
Office of Science | |
Basic Energy Sciences |
Keywords
- Atom probe
- High entropy alloy
- Irradiation effects
- Mechanical alloying
- Nanooxides
- NiCoCr
- Tomography