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High radiation tolerance of an ultrastrong nanostructured NiCoCr alloy with stable dispersed nanooxides and fine grain structure

Journal Article · · Journal of Nuclear Materials
 [1];  [2];  [3];  [4];  [5];  [3];  [4];  [4];  [2];  [6];  [7]
  1. Univ. of Michigan, Ann Arbor, MI (United States); Xi'an Jiaotong Univ. (China)
  2. Univ. of Science and Technology Beijing (China)
  3. Univ. of Michigan, Ann Arbor, MI (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Horia Hulubei National Inst. for Physics and Nuclear Engineering, Magurele (Romania)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  7. Univ. of Michigan, Ann Arbor, MI (United States); Univ. of Tennessee, Knoxville, TN (United States)
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.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1842604
Alternate ID(s):
OSTI ID: 1825816
Journal Information:
Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: N/A Vol. 557; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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