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SCI Article

Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy
성명 장재일()
소속 공과대학 신소재공학부
캠퍼스
우수선정주 2018년 12월 2째주
Author Yang, Guanghui (Div Mat Sci & Engn); Park, Jeong-Min (Div Mat Sci & Engn); 장재일 (Div Mat Sci & Engn);
Corresponding Author Info Jang, JI (reprint author), Hanyang Univ, Div Mat Sci & Engn, Seoul 04763, South Korea.; Suh, JY (reprint author), Korea Inst Sci & Technol, High Temp Energy Mat Res Ctr, Seoul 02792, South Korea.
E-mail 이메일 아이콘jijang@hanyang.ac.kr
Document Type Article
Source SCRIPTA MATERIALIA Volume:161 Issue: Pages:23-27 Published:2019
Times Cited 0
External Information http://dx.doi.org/10.1016/j.scriptamat.2018.10.010
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, tau(y), by modifying defect formation energies. Aging, subsequent to charging, leads to recovery of tau(y), 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. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Web of Science Categories Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
Funding National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2015R1A5A1037627, 2017R1A2B4012255]; China Postdoctoral Science Foundation [2017M620638]; Korea Institute of Science and Technology [2W28060]
Language English
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