Gong, P., Katzarov, I., Nutter, J. et al. (3 more authors) (2021) Hydrogen suppression of dislocation cell formation in micro and nano indentation of pure iron single crystals. Scripta Materialia, 194. 113683. ISSN 1359-6462
Abstract
The influence of hydrogen on dislocation mobility in pure single crystal iron subjected to micro- and nanoindentation testing perpendicular to the (100) plane has been analysed using electron back-scattered diffraction (EBSD) and transmission electron microscopy (TEM) and simulated using the self-consistent kinetic Monte-Carlo (SCkMC) method. The nanoindentation load curve for the hydrogen free sample has two major constant load pop-ins, and multiple smaller pop-ins, whereas the hydrogen charged material has only one pop-in but with a longer loading release. A well-defined cell structure was observed below the indenter in the hydrogen free condition, but the dislocations were homogenously distributed in the hydrogen charged sample. The SCkMC simulations showed that it is difficult for dislocations to glide out of the primary slip plane after hydrogen charging compared with the hydrogen free sample under the present loading conditions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 Acta Materialia Inc. This is an author produced version of a paper subsequently published in Scripta Materialia. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Pure iron single crystal; hydrogen induced softening; micro- and nanoindentation; self-consistent kinetic Monte-Carlo (SCkMC) simulations |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Funding Information: | Funder Grant number Engineering and Physical Science Research Council EP/L014742/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 14 Jan 2021 14:42 |
Last Modified: | 25 Dec 2021 01:38 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.scriptamat.2020.113683 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:170061 |
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