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This content will become publicly available on September 29, 2018

Title: Effects of temperature on the irradiation responses of Al 0.1 CoCrFeNi high entropy alloy

Structural damage and chemical segregation in Al 0.1CoCrFeNi high entropy alloy irradiated at elevated temperatures are studied using transmission electron microscopy (TEM) and atom probe tomography (APT). Irradiation-induced defects include dislocation loops, long dislocations and stacking-fault tetrahedra, but no voids can be observed. Furthermore, as irradiation temperature increases, defect density is decreased but defect size is increased, which is induced by increasing defect mobility. Finally, APT characterization reveals that ion irradiation at elevated temperatures can induce an enrichment of Ni and Co as well as a depletion of Fe and Cr at defect clusters, mainly including dislocation loops and long dislocations.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [2] ;  [3] ;  [4] ; ORCiD logo [4] ;  [4] ;  [5] ; ORCiD logo [2] ;  [5] ;  [4]
  1. Peking Univ., Beijing (China). Center for Applied Physics and Technology; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences
  3. Nanjing Univ. (China). Herbert Gleiter Inst. of Nanoscience
  4. Peking Univ., Beijing (China). Center for Applied Physics and Technology
  5. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering
Publication Date:
Grant/Contract Number:
AC05-00OR22725; SC0006661
Type:
Accepted Manuscript
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 144; Journal Issue: C; Journal ID: ISSN 1359-6462
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; irradiation effects; structural damage; chemical segregation; high entropy alloy
OSTI Identifier:
1399376