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Dynamic deformation behavior of a face-centered cubic FeCoNiCrMn high-entropy alloy
He JY; Wang Q; Zhang HS(张虎生); Dai LH(戴兰宏); Mukai T; Wu Y; Liu XJ; Wang H; Nieh TG; Lu ZP
2018-03-30
发表期刊Science Bulletin
卷号63期号:6页码:362-368
ISSN2095-9273
摘要

In this study, mechanical tests were conducted on a face-centered cubic FeCoNiCrMn high-entropy alloy, both in tension and compression, in a wide range of strain rates (10~(-4)–10~4 s~(-1)) to systematically investigate its dynamic response and underlying deformation mechanism. Materials with different grain sizes were tested to understand the effect of grain size, thus grain boundary volume, on the mechanical properties. Microstructures of various samples both before and after deformation were examined using electron backscatter diffraction and transmission electron microscopy. The dislocation structure as well as deformation-induced twins were analyzed and correlated with the measured mechanical properties. Plastic stability during tension of the current high-entropy alloy (HEA), in particular, at dynamic strain rates, was discussed in lights of strain-rate sensitivity and work hardening rate. It was found that, under dynamic conditions, the strength and uniform ductility increased simultaneously as a result of the massive formation of deformation twins. Specifically, an ultimate tensile strength of 734 MPa and uniform elongation of ~63% are obtained at 2.3 ×10~3 s~(-1), indicating that the alloy has great potential for energy absorption upon impact loading.

关键词High-entropy Alloys Dynamic Deformation Deformation Twinning Work-hardening Plastic Stability
DOI10.1016/j.scib.2018.01.022
收录类别SCI ; EI ; CSCD
语种英语
WOS记录号WOS:000429784000008
项目资助者supported by the National Natural Science Foundation of China,111 Project,International S&T Cooperation Program of China,Program for Changjiang Scholars and Innovative Research Team in University of China,the Projects of SKL-AMM-USTB,support from the Top-Notch Young Talents Program and the Fundamental Research Funds for the Central Universities,support by US-NSF under contract
CSCD记录号CSCD:6217631
论文分区二类/q1
力学所作者排名3
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77728
专题非线性力学国家重点实验室
作者单位1.University of Science and Technology Beijing
2.Max-Planck-Institut fur Eisenforschung
3.Institute of Mechanics, Chinese Academy of Sciences
4.China Ship Development and Design Center
5.Department of Mechanical Engineering, Kobe University
6.Department of Materials Science and Engineering, The University of Tennessee
推荐引用方式
GB/T 7714
He JY,Wang Q,Zhang HS,et al. Dynamic deformation behavior of a face-centered cubic FeCoNiCrMn high-entropy alloy[J]. Science Bulletin,2018,63(6):362-368.
APA He JY.,Wang Q.,Zhang HS.,Dai LH.,Mukai T.,...&Lu ZP.(2018).Dynamic deformation behavior of a face-centered cubic FeCoNiCrMn high-entropy alloy.Science Bulletin,63(6),362-368.
MLA He JY,et al."Dynamic deformation behavior of a face-centered cubic FeCoNiCrMn high-entropy alloy".Science Bulletin 63.6(2018):362-368.
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