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Temperature- and strain-dependent thermally-activated deformation mechanism of a ferrous medium-entropy alloy SCIE SCOPUS

Title
Temperature- and strain-dependent thermally-activated deformation mechanism of a ferrous medium-entropy alloy
Authors
Lee, JungwanMoon, JongunBae, Jae WungPark, Jeong MinKwon, HyeonseokKato, HidemiKim, Hyoung Seop
Date Issued
2021-07
Publisher
ELSEVIER SCI LTD
Abstract
In this study, quasi-static tensile properties of Fe60Co15Ni15Cr10 (at%) ferrous medium-entropy alloy at 298 K and 77 K were investigated in terms of thermally-activated deformation mechanism. Relatively high strain rate sensitivity and low activation volume were estimated using strain rate jump tests at 77 K where deformationinduced martensitic transformation took place, compared to those at 298 K. Different rate-controlling mechanisms were identified for early and latter deformation at both temperatures considering the plastic strain. Dislocation behaviors, e.g., cross-slip or dislocation accumulation, based on the thermally-activated deformation mechanism, support the outstanding cryogenic tensile properties of the present alloy.
URI
https://oasis.postech.ac.kr/handle/2014.oak/109048
DOI
10.1016/j.intermet.2021.107202
ISSN
0966-9795
Article Type
Article
Citation
INTERMETALLICS, vol. 134, 2021-07
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