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

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...

Full description

Saved in:
Bibliographic Details
Main Authors: Yang, Guanghui, Zhao, Yakai, Lee, Dong-Hyun, Park, Jeong-Min, Seok, Moo-Young, Suh, Jin-Yoo, Ramamurty, Upadrasta, Jang, Jae-il
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2021
Subjects:
Online Access:https://hdl.handle.net/10356/151268
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-151268
record_format dspace
spelling sg-ntu-dr.10356-1512682021-06-14T09:02:23Z 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 School of Mechanical and Aerospace Engineering Engineering::Materials High-entropy Alloy Hydrogen 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. 2021-06-14T09:02:22Z 2021-06-14T09:02:22Z 2019 Journal Article 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 1359-6462 https://hdl.handle.net/10356/151268 10.1016/j.scriptamat.2018.10.010 2-s2.0-85054691760 161 23 27 en Scripta Materialia © 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
High-entropy Alloy
Hydrogen
spellingShingle Engineering::Materials
High-entropy Alloy
Hydrogen
Yang, Guanghui
Zhao, Yakai
Lee, Dong-Hyun
Park, Jeong-Min
Seok, Moo-Young
Suh, Jin-Yoo
Ramamurty, Upadrasta
Jang, Jae-il
Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy
description 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.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Yang, Guanghui
Zhao, Yakai
Lee, Dong-Hyun
Park, Jeong-Min
Seok, Moo-Young
Suh, Jin-Yoo
Ramamurty, Upadrasta
Jang, Jae-il
format Article
author Yang, Guanghui
Zhao, Yakai
Lee, Dong-Hyun
Park, Jeong-Min
Seok, Moo-Young
Suh, Jin-Yoo
Ramamurty, Upadrasta
Jang, Jae-il
author_sort Yang, Guanghui
title Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy
title_short Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy
title_full Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy
title_fullStr Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy
title_full_unstemmed Influence of hydrogen on incipient plasticity in CoCrFeMnNi high-entropy alloy
title_sort influence of hydrogen on incipient plasticity in cocrfemnni high-entropy alloy
publishDate 2021
url https://hdl.handle.net/10356/151268
_version_ 1703971244212224000