Liang, X.Z., Zhao, G.-H., Owens, J. et al. (3 more authors) (2020) Hydrogen-assisted microcrack formation in bearing steels under rolling contact fatigue. International Journal of Fatigue, 134. 105485. ISSN 0142-1123
Abstract
A ball-on-rod RCF tester was employed to investigate the failure mechanisms of hydrogen-rich rolling components. The formation of defects, voids and surface cracks is significantly facilitated in hydrogen-rich bearing steels. In samples with RCF cycles of 1.6 × 10^7, the void density in hydrogen-rich samples is about three times that of hydrogen-free samples, whilst their crack length density four times that of hydrogen-free samples. This is due to a higher stress intensity factor around inclusions which is altered by hydrogen. Further characterisation confirms that grain boundaries are preferential sites for void formation and crack propagation.
Metadata
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Copyright, Publisher and Additional Information: | © 2020 The Author(s). This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/). | ||||
Keywords: | Hydrogen embrittlement; Rolling contact fatigue; Crack propagation | ||||
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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: |
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Depositing User: | Symplectic Sheffield | ||||
Date Deposited: | 13 Mar 2020 16:19 | ||||
Last Modified: | 13 Mar 2020 16:19 | ||||
Status: | Published | ||||
Publisher: | Elsevier | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1016/j.ijfatigue.2020.105485 |