Pressure-induced phase transition in the AlCoCrFeNi high-entropy alloy

Cheng, Benyuan; Zhang, Fei; Lou, Hongbo; Chen, Xiehang; Liaw, Peter K.; Yan, Jinyuan; Zeng, Zhidan; Ding, Yang; Zeng, Qiaoshi

doi:10.1016/j.scriptamat.2018.10.020

Pressure-induced phase transition in the AlCoCrFeNi high-entropy alloy

Journal Article · Wed Oct 24 00:00:00 EDT 2018 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2018.10.020· OSTI ID:1542378

Cheng, Benyuan ^[1]; Zhang, Fei ^[2]; Lou, Hongbo ^[2]; Chen, Xiehang ^[2]; Liaw, Peter K. ^[3]; Yan, Jinyuan ^[4]; Zeng, Zhidan ^[2]; Ding, Yang ^[2]; Zeng, Qiaoshi ^[5]

Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai (China); China Academy of Engineering Physics, Sichuan (China)
Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai (China)
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Univ. of California, Santa Cruz, CA (United States). Dept. of Earth and Planetary Sciences
Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai (China); Southeast Univ., Nanjing (China). Jiangsu Key Lab. of Advanced Metallic Materials, School of Materials Science and Engineering

The recently discovered pressure-induced polymorphic transitions (PIPT) in high-entropy alloys (HEAs) have opened an avenue towards understanding the phase stability and achieving atomic structural tuning of HEAs. So far, whether there is any PIPT in the body-centered cubic (bcc) HEAs remains unclear. Here, we studied an ordered bcc-structured (B2 phase) AlCoCrFeNi HEA using in situ synchrotron radiation X-ray diffraction (XRD) up to 42 GPa and ex situ transmission electron microscopy, a PIPT to a likely-distorted phase was observed. These results highlight the effect of the lattice distortion on the stability of HEAs and extend the polymorphism into ordered bcc-structured HEAs.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231; AC02-06CH11357; NA0001974

OSTI ID:: 1542378

Alternate ID(s):: OSTI ID: 1636966
OSTI ID: 22819361
OSTI ID: 1480347

Journal Information:: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: C Vol. 161; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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