White etching crack (WEC) investigation by serial sectioning, focused ion beam and 3-D crack modelling
White etching crack (WEC) investigation by serial sectioning, focused ion beam and 3-D crack modelling
White structure flaking (WSF) as a premature wear failure mode in steel rolling element bearings is caused by white etching cracks (WECs) that form in the 1 mm zone beneath the contact surface. Hydrogen diffusion into raceways and transient operating conditions have been suggested as drivers of WSF. The initiation and propagation mechanisms for WEC formation are not well understood. This study elucidates WEC initiation processes in hydrogen charged 100Cr6 bearing steel by carrying out two-roller RCF testing. The application of serial sectioning enabled mapping and modelling of entire independent WECs and revealed critical information about initiators. The application of FIB tomography verified initiation mechanisms. The results show strong evidence for subsurface initiation of WECs from inclusions
rolling contact, roller bearings, tomography, focused ion beam
Evans, M.-H.
5f015c47-3165-4f64-8561-7c047a9d2186
Wang, L.
c50767b1-7474-4094-9b06-4fe64e9fe362
Jones, H.
72e80555-02a1-41fe-9a6b-0d7d8b3cd72a
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Evans, M.-H.
5f015c47-3165-4f64-8561-7c047a9d2186
Wang, L.
c50767b1-7474-4094-9b06-4fe64e9fe362
Jones, H.
72e80555-02a1-41fe-9a6b-0d7d8b3cd72a
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Evans, M.-H., Wang, L., Jones, H. and Wood, R.J.K.
(2013)
White etching crack (WEC) investigation by serial sectioning, focused ion beam and 3-D crack modelling.
Tribology International.
(doi:10.1016/j.triboint.2013.03.022).
Abstract
White structure flaking (WSF) as a premature wear failure mode in steel rolling element bearings is caused by white etching cracks (WECs) that form in the 1 mm zone beneath the contact surface. Hydrogen diffusion into raceways and transient operating conditions have been suggested as drivers of WSF. The initiation and propagation mechanisms for WEC formation are not well understood. This study elucidates WEC initiation processes in hydrogen charged 100Cr6 bearing steel by carrying out two-roller RCF testing. The application of serial sectioning enabled mapping and modelling of entire independent WECs and revealed critical information about initiators. The application of FIB tomography verified initiation mechanisms. The results show strong evidence for subsurface initiation of WECs from inclusions
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e-pub ahead of print date: 18 April 2013
Keywords:
rolling contact, roller bearings, tomography, focused ion beam
Organisations:
nCATS Group
Identifiers
Local EPrints ID: 354220
URI: http://eprints.soton.ac.uk/id/eprint/354220
ISSN: 0301-679X
PURE UUID: 38d982c8-844d-470c-8723-02df61ebc30d
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Date deposited: 05 Jul 2013 14:19
Last modified: 15 Mar 2024 03:12
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Author:
M.-H. Evans
Author:
H. Jones
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