Initiation and evolution of butterflies in roller bearings due to rolling contact fatigue
Initiation and evolution of butterflies in roller bearings due to rolling contact fatigue
This investigation entails analysis of 520 butterfly formations (BFs) and non-metallic inclusions without BFs in two RCF-tested roller bearings to elucidate the influence of inclusion characteristics and stress level they are subject to, on the initiation and growth of BFs. The results show duplex inclusions, though least frequent in the bearing steels, exhibit the highest butterfly formation rate comparing with pure sulphide/oxide inclusions. It is also found that larger inclusions and those with smaller aspect ratios are more prone to butterfly formation; BF wing length decreases with the increase of inclusion aspect ratio; BF orientation is significantly influenced by inclusion size and stress level; stress magnitude appears to either impede or facilitate BF wing growth depending on BF orientation.
Initiation and evolution of butterflies in roller bearings, rolling contact fatigue
El Laithy, M.
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Wang, L.
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Harvey, T.
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Schwedt, A.
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Kruhoeffer, W.
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Mayer, J.
dcdcf323-bbf8-4616-8977-3ec874f02dea
El Laithy, M.
8d378e75-e155-44b9-b4da-a7ff11d774db
Wang, L.
c50767b1-7474-4094-9b06-4fe64e9fe362
Harvey, T.
3b94322b-18da-4de8-b1af-56d202677e04
Schwedt, A.
ab63c626-ab28-4afc-9693-51ce4e11fe78
Kruhoeffer, W.
ad0137c9-774f-4e15-9a32-94fd7661aa7f
Mayer, J.
dcdcf323-bbf8-4616-8977-3ec874f02dea
El Laithy, M., Wang, L., Harvey, T., Schwedt, A., Kruhoeffer, W. and Mayer, J.
(2023)
Initiation and evolution of butterflies in roller bearings due to rolling contact fatigue.
Tribology International.
(In Press)
Abstract
This investigation entails analysis of 520 butterfly formations (BFs) and non-metallic inclusions without BFs in two RCF-tested roller bearings to elucidate the influence of inclusion characteristics and stress level they are subject to, on the initiation and growth of BFs. The results show duplex inclusions, though least frequent in the bearing steels, exhibit the highest butterfly formation rate comparing with pure sulphide/oxide inclusions. It is also found that larger inclusions and those with smaller aspect ratios are more prone to butterfly formation; BF wing length decreases with the increase of inclusion aspect ratio; BF orientation is significantly influenced by inclusion size and stress level; stress magnitude appears to either impede or facilitate BF wing growth depending on BF orientation.
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Accepted/In Press date: 27 September 2023
Keywords:
Initiation and evolution of butterflies in roller bearings, rolling contact fatigue
Identifiers
Local EPrints ID: 484194
URI: http://eprints.soton.ac.uk/id/eprint/484194
ISSN: 0301-679X
PURE UUID: b5826c45-fe5f-4e92-a4f2-acd2b958b3d2
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Date deposited: 13 Nov 2023 17:53
Last modified: 18 Mar 2024 04:05
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Contributors
Author:
M. El Laithy
Author:
A. Schwedt
Author:
W. Kruhoeffer
Author:
J. Mayer
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