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

Yang, Guanghui; Zhao, Yakai; Lee, Dong-Hyun; Park, Jeong-Min; Seok, Moo-Young; Suh, Jin-Yoo; Ramamurty, Upadrasta; Jang, Jae-il

doi:10.1016/j.scriptamat.2018.10.010

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., Ramamurty, U., & Jang, J.-i. (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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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-0002-761F-8 版のパーマリンク: https://hdl.handle.net/21.11116/0000-0002-7620-5

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Yang, Guanghui¹, 著者
Zhao, Yakai², 著者
Lee, Dong-Hyun³, 著者
Park, Jeong-Min¹, 著者
Seok, Moo-Young⁴, 著者
Suh, Jin-Yoo⁵, 著者
Ramamurty, Upadrasta⁶, 著者
Jang, Jae-il⁷, 著者

所属:
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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キーワード: 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

要旨: 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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言語: eng - English

日付: 出版: 2019-03-01

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識別子（DOI, ISBNなど）: DOI: 10.1016/j.scriptamat.2018.10.010
BibTex参照ID: Yang201923

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出版物名: Scripta Materialia

省略形 : Scripta Mater.

種別: 学術雑誌

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出版社, 出版地: Amsterdam : Elsevier B. V.

ページ: - 巻号: 161 通巻号: - 開始・終了ページ: 23 - 27 識別子（ISBN, ISSN, DOIなど）: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506

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