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  Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy

Yang, G., Zhao, Y., Lee, D.-H., Park, J.-M., Seok, M.-Y., Suh, J.-Y., et al. (2019). Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy. Scripta Materialia, 161, 23-27. doi:10.1016/j.scriptamat.2018.10.010.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-761F-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-7620-5
Genre: Journal Article

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 Creators:
Yang, Guanghui1, Author              
Zhao, Yakai2, Author              
Lee, Dong-Hyun3, Author              
Park, Jeong-Min1, Author              
Seok, Moo-Young4, Author              
Suh, Jin-Yoo5, Author              
Ramamurty, Upadrasta6, Author              
Jang, Jae-il7, Author              
Affiliations:
1Division of Materials Science and Engineering, Hanyang University, Seoul, 04763, South Korea, ou_persistent22              
2School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China, ou_persistent22              
3Alloys for Additive Manufacturing, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2117289              
4Nano-/ Micromechanics of Materials, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863401              
5High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea, ou_persistent22              
6School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, ou_persistent22              
7Division of Materials Science and Engineering, Hanyang University, Seoul 04763, South Korea, ou_persistent22              

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Free keywords: Chromium alloys; Entropy; Hydrogen; Iron alloys; Manganese alloys; Nanoindentation; Shear flow; Vacancies, Defect formation energies; Dislocation nucleation; Dissolved hydrogen; High entropy alloys; Incipient plasticity; Nanoindentation experiments; Plastic flow resistance; Shear yield strength, Cobalt alloys
 Abstract: The influence of hydrogen on the onset of plastic deformation in a CoCrFeMnNi high-entropy alloy (HEA) was examined through the analysis of the load at which first pop-in during spherical nanoindentation experiments occurs on hydrogen-charged and subsequently aged specimens. Results reveal that the dissolved hydrogen lowers the plastic flow resistance, indicated by the shear yield strength, τy, by modifying defect formation energies. Aging, subsequent to charging, leads to recovery of τy, but only partially. The results are discussed in terms of the vacancy-mediated dislocation nucleation, which is supported by the estimated activation volume for deformation. © 2018 Acta Materialia Inc.

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Language(s): eng - English
 Dates: 2019-03-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.scriptamat.2018.10.010
BibTex Citekey: Yang201923
 Degree: -

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Title: Scripta Materialia
  Abbreviation : Scripta Mater.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B. V.
Pages: - Volume / Issue: 161 Sequence Number: - Start / End Page: 23 - 27 Identifier: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506