| 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 | |
| Corresponding Author | 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 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 48Pages:146-155 |
| Abstract | 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. |
| Keyword | High entropy alloys First-principle calculations Elastic constants Ideal tensile strength Stacking fault energy |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000534323200019 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/138954 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yan, H. L.; Hu, Q. M.; Jia, N. |
| Affiliation | 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 |
| Recommended Citation 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. |
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