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

Chen, Shuying; Xie, Xie; Chen, Bilin; Qiao, Junwei; Zhang, Yong; Ren, Yang; Dahmen, Karin A.; Liaw, Peter K.

doi:10.1007/s11837-015-1580-8

Title: Effects of temperature on serrated flows of Al_0.5CoCrCuFeNi high-entropy alloy

Journal Article · Fri Aug 14 00:00:00 EDT 2015 · JOM. Journal of the Minerals, Metals & Materials Society

DOI:https://doi.org/10.1007/s11837-015-1580-8· OSTI ID:1224528

Chen, Shuying ^[1]; Xie, Xie ^[1]; Chen, Bilin ^[1]; Qiao, Junwei ^[2]; Zhang, Yong ^[3]; Ren, Yang ^[4]; Dahmen, Karin A. ^[5]; Liaw, Peter K. ^[1]

Univ. of Tennessee, Knoxville, TN (United States)
Taiyuan Univ. of Technology, Taiyuan (China)
Univ. of Science and Technology Beijing, Beijing (China)
Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Illinois Urbana-Champaign, Champaign, IL (United States)

Compression behavior of the Al_0.5CoCrCuFeNi high-entropy alloy (HEA) was studied at different temperatures from 673 K to 873 K 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.

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Research Organization:: Univ. of Tennessee, Knoxville, TN (United States); Univ. of Illinois at Urbana-Champaign, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FE0011194; AC02-06CH11357

OSTI ID:: 1224528

Alternate ID(s):: OSTI ID: 1245424

Journal Information:: JOM. Journal of the Minerals, Metals & Materials Society, Vol. 67, Issue 10; ISSN 1047-4838

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 42 works

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