The effect of Co and Cr substitutions for Ni on mechanical properties and plastic deformation mechanism of FeMnCoCrNi high entropy alloys

doi:10.1016/j.jmst.2020.03.010

IMR OpenIR

	The effect of Co and Cr substitutions for Ni on mechanical properties and plastic deformation mechanism of FeMnCoCrNi high entropy alloys
	Zhang, H. F.1; Yan, H. L.2; Yu, H.1,3,4; Ji, Z. W.5; Hu, Q. M.3; Jia, N.1
通讯作者	Yan, H. L.(yanhaile@mail.neu.edu.cn) ; Hu, Q. M.(qmhu@imr.ac.cn) ; Jia, N.(jian@atm.neu.edu.cn)
	2020-07-01
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	48 页码:146-155
摘要	The elastic constants, ideal tensile strength (ITS), stacking fault energy (SFE), lattice constant and magnetic moment of FeMnCoCrNi high entropy alloys with varying Co and Cr contents at 0 and 300 K were systematically investigated by first-principle calculations. For the alloys with Co substitution for Ni, at both temperatures the elastic stability of the face-centered cubic (fcc) phase, bulk elastic modulus (B), Young's modulus (E), shear modulus (G) and ITS increase monotonically with increasing Co content. However, the Cauchy pressure (C-P), Pugh ratio (B/G), Poisson ratio (upsilon), Zener anisotropy ratio (A(Z)) and elastic anisotropy ratio (A(VR)) decrease monotonically. The SFE also decreases with the increase of Co, resulting in the change of plastic deformation mechanism from dislocation slip to mechanical twinning, and then to hcp-martensitic transformation. This elucidates the underlying mechanism of the effect of Co addition on the strength and micromechanical behavior of FeMnCoCrNi alloys. Compared with Co, the Cr substitution for Ni leads to the more complex change of elastic constants and ITS. The increase of Cr shows the similar effect on SFE and deformation mechanism as that of Co. The variation of valence electron concentration and magnetism affect the SFE. The increase of either Co or Cr leads to the reduced magnetic moments of Fe and Mn. This could be responsible for the monotonic decrease of both lattice constant and SFE as the Co content increases. However, for the Cr addition case, multiple factors may affect the evolution of lattice constant and SFE. These findings shed light on the deformation mechanism of the alloys with different compositions. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	High entropy alloys First-principle calculations Elastic constants Ideal tensile strength Stacking fault energy
资助者	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Liaoning Natural Science Foundation
DOI	10.1016/j.jmst.2020.03.010
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51922026] ; National Natural Science Foundation of China[51571057] ; Fundamental Research Funds for the Central Universities[N2002005] ; Fundamental Research Funds for the Central Universities[N2007011] ; Liaoning Natural Science Foundation[20180510010]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000534323200019
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：42[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/138954
专题	中国科学院金属研究所
通讯作者	Yan, H. L.; Hu, Q. M.; Jia, N.
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Peoples R China 2.Northeastern Univ, State Key Lab Rolling Automat, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Shen Yang Univ Technol, Shenyang 110870, Peoples R China 5.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
推荐引用方式 GB/T 7714	Zhang, H. F.,Yan, H. L.,Yu, H.,et al. The effect of Co and Cr substitutions for Ni on mechanical properties and plastic deformation mechanism of FeMnCoCrNi high entropy alloys[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,48:146-155.
APA	Zhang, H. F.,Yan, H. L.,Yu, H.,Ji, Z. W.,Hu, Q. M.,&Jia, N..(2020).The effect of Co and Cr substitutions for Ni on mechanical properties and plastic deformation mechanism of FeMnCoCrNi high entropy alloys.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,48,146-155.
MLA	Zhang, H. F.,et al."The effect of Co and Cr substitutions for Ni on mechanical properties and plastic deformation mechanism of FeMnCoCrNi high entropy alloys".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 48(2020):146-155.