Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151268
Title: Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy
Authors: Yang, Guanghui
Zhao, Yakai
Lee, Dong-Hyun
Park, Jeong-Min
Seok, Moo-Young
Suh, Jin-Yoo
Ramamurty, Upadrasta
Jang, Jae-il
Keywords: Engineering::Materials
Issue Date: 2019
Source: Yang, G., Zhao, Y., Lee, D., Park, J., Seok, M., Suh, J., Ramamurty, U. & Jang, J. (2019). Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy. Scripta Materialia, 161, 23-27. https://dx.doi.org/10.1016/j.scriptamat.2018.10.010
Journal: Scripta Materialia 
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.
URI: https://hdl.handle.net/10356/151268
ISSN: 1359-6462
DOI: 10.1016/j.scriptamat.2018.10.010
Rights: © 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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