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Title: Effects of temperature on serrated flows of Al0.5CoCrCuFeNi high-entropy alloy

Compression behavior of the Al0.5CoCrCuFeNi high-entropy alloy (HEA) was studied at different temperatures from 673K to 873K at a low strain rate of 5 x 10-5/s to investigate the temperature effect on the mechanical properties and serration behavior. The face-centered cubic (FCC) structure is confirmed at the lower temperature of 673 K and 773 K, and a structure of mixed FCC and body-centered cubic (BCC) is identified at a higher temperature of 873 K after compression tests using high-energy synchrotron X-ray diffraction. As a result, by comparing the stress-strain curves at different temperatures, two opposite directions of serrations types were found, named upward serrations appearing at 673 K and 773 K and downward serrations at 873 K, which may be due to dynamic strain aging.
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Taiyuan Univ. of Technology, Taiyuan (China)
  3. Univ. of Science and Technology Beijing, Beijing (China)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Univ. of Illinois Urbana-Champaign, Champaign, IL (United States)
Publication Date:
OSTI Identifier:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of The Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 67; Journal Issue: 10; Journal ID: ISSN 1047-4838
Research Org:
Univ. of Tennessee, Knoxville, TN (United States); Univ. of Illinois Urbana-Champaign, Champaign, IL (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE)
Country of Publication:
United States
36 MATERIALS SCIENCE high-entropy alloy; mechanical properties; serration behavior