Nanoindentation characterized initial creep behavior of a high-entropy-based alloy CoFeNi

Zhijun Wang; Sheng Guo; Qing Wang; Zhiyuan Liu; Jincheng Wang; Yong Yang; C. T. Liu

doi:10.1016/j.intermet.2014.05.007

Author(s)

Sheng Guo
Qing Wang
Zhiyuan Liu
Jincheng Wang

Related Research Unit(s)

Detail(s)

Original language	English
Pages (from-to)	183-186
Journal / Publication	Intermetallics
Volume	53
Publication status	Published - Oct 2014

Link(s)

DOI	DOI https://doi.org/10.1016/j.intermet.2014.05.007 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84901988705&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(09b8ad43-4aff-41b9-9fd6-6ff45da21d5d).html

Abstract

A crossover behavior in the initial creep stage during nanoindentation with a constant load for a high-entropy-based alloy CoFeNi is found. The holding time and stress in the indentation tests are evaluated to reveal the intrinsic mechanism of the crossover point. It indicated that the initial creep behavior is dominated by the strain-hardening at the beginning and then transit into the dislocation migration induced viscous stage. The transition presents the crossover, where the strain hardening effect predominates in a very short initial period while the viscous stage accounts for most of the initial creep stage with a time-dependent strain rate. © 2014 Elsevier Ltd. All rights reserved.