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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
Source PublicationScience Bulletin

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.

KeywordHigh-entropy Alloys Dynamic Deformation Deformation Twinning Work-hardening Plastic Stability
Indexed BySCI ; EI ; CSCD
WOS IDWOS:000429784000008
Funding Organizationsupported 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
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Affiliation1.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
Recommended Citation
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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