Mechanical Properties and Microstructure of the CoCrFeMnNi High Entropy Alloy Under High Strain Rate Compression

被引：1
作者：
Bingfeng Wang
Ao Fu
Xiaoxia Huang
Bin Liu
Yong Liu
Zezhou Li
Xiang Zan
机构：
[1] Central South University,State Key Laboratory for Powder Metallurgy
[2] Central South University,School of Materials Science and Engineering
[3] Central South University,Key Lab of Nonferrous Materials, Ministry of Education
[4] University of California,Department of Mechanical and Aerospace Engineering
[5] Hefei University of Technology,School of Materials Science and Engineering
来源：
Journal of Materials Engineering and Performance | 2016年 / 25卷
关键词：
high entropy alloy; serration behavior; spark plasma sintering; strain rate;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The equiatomic CoCrFeMnNi high entropy alloy, which crystallizes in the face-centered cubic (FCC) crystal structure, was prepared by the spark plasma sintering technique. Dynamic compressive tests of the CoCrFeMnNi high entropy alloy were deformed at varying strain rates ranging from 1 × 103 to 3 × 103 s−1 using a split-Hopkinson pressure bar (SHPB) system. The dynamic yield strength of the CoCrFeMnNi high entropy alloy increases with increasing strain rate. The Zerilli-Armstrong (Z-A) plastic model was applied to model the dynamic flow behavior of the CoCrFeMnNi high entropy alloy, and the constitutive relationship was obtained. Serration behavior during plastic deformation was observed in the stress-strain curves. The mechanism for serration behavior of the alloy deformed at high strain rate is proposed.
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页码：2985 / 2992
页数：7
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