Strain-rate effect upon the tensile behavior of CoCrFeNi high-entropy alloys
Date
2017
Authors
Huo, W.
Zhou, H.
Fang, F.
Hu, X.
Xie, Z.
Jiang, J.
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Journal article
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Materials Science & Engineering: A, 2017; 689:366-369
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Wenyi Huo, Hui Zhou, Feng Fang, Xianjun Hu, Zonghan Xie, d, Jianqing Jiang
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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.
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© 2017 Elsevier B.V. All rights reserved.