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Type: Journal article
Title: Strain-rate effect upon the tensile behavior of CoCrFeNi high-entropy alloys
Author: Huo, W.
Zhou, H.
Fang, F.
Hu, X.
Xie, Z.
Jiang, J.
Citation: Materials Science and Engineering A, 2017; 689:366-369
Publisher: Elsevier
Issue Date: 2017
ISSN: 0921-5093
Statement of
Wenyi Huo, Hui Zhou, Feng Fang, Xianjun Hu, Zonghan Xie, d, Jianqing Jiang
Abstract: High-entropy alloys could replace conventional materials in critical load-bearing applications, owing to their excellent mechanical properties. Supported by X-ray diffraction, microstructure analysis and tensile testing, the mechanical response of CoCrFeNi HEAs to varying strain rates was investigated. The alloys were found to be a single-phase face-centered cubic solid solution. Their tensile strength and ductility increased with rising strain rate. The dominant deformation mechanism of the high-entropy alloy was observed to shift from the dislocation motion at the lower strain rates to stacking faults at the higher strain rates. The CoCrFeNi high-entropy alloys exhibited greater hardness following tensile deformation with higher strain rates.
Keywords: High-entropy alloy; CoCrFeNi; face-centered cubic; tensile behavior; strain rate
Rights: © 2017 Elsevier B.V. All rights reserved.
RMID: 0030065999
DOI: 10.1016/j.msea.2017.02.077
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Appears in Collections:Mechanical Engineering publications

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