A unified theory for microstructural alterations in bearing steels under rolling contact fatigue
A unified theory for microstructural alterations in bearing steels under rolling contact fatigue
Three major types of microstructural alterations occurring under rolling contact fatigue, white etching areas (WEAs), dark etching regions (DERs) and white etching bands (WEBs), are modelled under a unified approach: dislocation-assisted carbon migration theory. Following our previous work on DERs and WEBs, a novel model is proposed to describe dislocation cell formation in WEAs. The proposed model yields predictions of WEAs appearance, agreeing with experimental observations. Bearing life can be estimated by the WEA appearance model. The three microstructural alterations models are combined and, for the first time, it becomes possible to predict the occurrence and the formation progress of WEAs, DERs and WEBs with a unified theory. Microstructural alteration maps are plotted as a function of number of cycles, temperature, contact pressure and stress cycle frequency. The models are validated by the experimental results reported over the last 50 years.
Bearing steels, Dark etching regions, Rolling contact fatigue, White etching areas, White etching bands
43-55
Fu, Hanwei
5bfa8370-2f21-436c-8c78-ce414d925d94
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
4 June 2018
Fu, Hanwei
5bfa8370-2f21-436c-8c78-ce414d925d94
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Fu, Hanwei and Rivera-Díaz-del-Castillo, Pedro E.J.
(2018)
A unified theory for microstructural alterations in bearing steels under rolling contact fatigue.
Acta Materialia, 155, .
(doi:10.1016/j.actamat.2018.05.056).
Abstract
Three major types of microstructural alterations occurring under rolling contact fatigue, white etching areas (WEAs), dark etching regions (DERs) and white etching bands (WEBs), are modelled under a unified approach: dislocation-assisted carbon migration theory. Following our previous work on DERs and WEBs, a novel model is proposed to describe dislocation cell formation in WEAs. The proposed model yields predictions of WEAs appearance, agreeing with experimental observations. Bearing life can be estimated by the WEA appearance model. The three microstructural alterations models are combined and, for the first time, it becomes possible to predict the occurrence and the formation progress of WEAs, DERs and WEBs with a unified theory. Microstructural alteration maps are plotted as a function of number of cycles, temperature, contact pressure and stress cycle frequency. The models are validated by the experimental results reported over the last 50 years.
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Accepted/In Press date: 23 May 2018
e-pub ahead of print date: 26 May 2018
Published date: 4 June 2018
Keywords:
Bearing steels, Dark etching regions, Rolling contact fatigue, White etching areas, White etching bands
Identifiers
Local EPrints ID: 491983
URI: http://eprints.soton.ac.uk/id/eprint/491983
ISSN: 1359-6454
PURE UUID: 06ef5f53-21de-465c-8d38-69408c8fe9f0
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Date deposited: 10 Jul 2024 16:34
Last modified: 12 Jul 2024 02:13
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Contributors
Author:
Hanwei Fu
Author:
Pedro E.J. Rivera-Díaz-del-Castillo
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