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 | |
发表期刊 | Science Bulletin |
2018-03-30 | |
卷号 | 63期号:6页码:362-368 |
ISSN | 2095-9273 |
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 |
DOI | 10.1016/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 | |
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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