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  Cyclic Plasticity of CoCrFeMnNi High-Entropy Alloy (HEA): A Molecular Dynamics Simulation

Shi, M., Lu, X., Shuang, S., Wang, Z., Xiong, Q.-l., Kang, G., et al. (2021). Cyclic Plasticity of CoCrFeMnNi High-Entropy Alloy (HEA): A Molecular Dynamics Simulation. Archive of Applied Mechanics, 13(1): 2150006. doi:10.1142/S175882512150006X.

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 Creators:
Shi, Mingxing1, Author              
Lu, Xiaochong1, Author              
Shuang, Siyao2, Author              
Wang, Zhangwei3, Author              
Xiong, Qi-lin4, Author              
Kang, Guozheng1, Author              
Zhang, Xu1, Author              
Affiliations:
1Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, 610031, China, ou_persistent22              
2Applied Mechanics and Structure, Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China, ou_persistent22              
3High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3010672              
4Department of Mechanics, Huazhong University of Science & Technology, Wuhan 430074, P. R. China, ou_persistent22              

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Free keywords: Chromium alloys; Cobalt alloys; Entropy; High-entropy alloys; Iron alloys; Molecular dynamics; Plasticity; Temperature, Cyclic deformations; Cyclic plasticity; Effects of temperature; Lattice disorders; Molecular dynamics simulations; Partial dislocations; Safety assessments; Twin boundaries, Manganese alloys
 Abstract: The CoCrFeMnNi high-entropy alloy (HEA) is a potential structural material, whose cyclic plasticity is essential for its safety assessment in service. Here, the effects of twin boundaries (TBs) and temperature on the cyclic plasticity of CoCrFeMnNi HEA were studied by the molecular dynamics (MD) simulation. The simulation results showed that a significant amount of lattice disorders were generated due to the interactions between partial dislocations in CoCrFeMnNi HEA during the cyclic deformation. Lattice disorder impeded the reverse movement of dislocations and then weakened Bauschinger's effect in the HEA. The cyclic plasticity of CoCrFeMnNi HEA, especially Bauschinger's effect, depends highly on the temperature and pre-existing TBs. Such dependence lies in the effects of temperature and pre-existing TBs on the extent of lattice disorder. This study helps further understand the cyclic plasticity of CoCrFeMnNi HEA from the atomic scale. © 2021 World Scientific Publishing Europe Ltd.

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Language(s): eng - English
 Dates: 2021-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1142/S175882512150006X
 Degree: -

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Title: Archive of Applied Mechanics
  Other : Arch. Appl. Mech.
Source Genre: Journal
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Publ. Info: New York, NY : Springer International
Pages: - Volume / Issue: 13 (1) Sequence Number: 2150006 Start / End Page: - Identifier: ISSN: 0939-1533
CoNE: https://pure.mpg.de/cone/journals/resource/954928488327