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Further Investigations and Parametric Analysis of Microstructural Alterations under Rolling Contact Fatigue.

Abdullah, M. U. and Khan, Z. A., 2022. Further Investigations and Parametric Analysis of Microstructural Alterations under Rolling Contact Fatigue. Materials, 15 (22), 8072.

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Bearing elements under rolling contact fatigue (RCF) exhibit microstructural features, known as white etching bands (WEBs) and dark etching regions (DERs). Formation mechanism of these microstructural features had been questionable and therefore warranted this study to gain further understanding. Current research describes mechanistic investigations of standard AISI 52100 bearing steel balls subjected to RCF testing under tempering conditions. Subsurface analyses of RCF-tested samples at tempering conditions have indicated that the microstructural alterations are progressed with subsurface yielding and primarily dominated by thermal tempering. Further-more, bearing balls are subjected to static load tests in order to evaluate the effect of lattice de-formation. It is suggested from the comparative analyses that a complete rolling sequence with non-proportional stress history is essential for the initiation and progression of WEBs, supported by the combination of carbon flux assisted by dislocation and thermally activated carbon diffusion. These novel findings will lead to developing a contemporary and new-fangled prognostic model applied to microstructural alterations.

Item Type:Article
Additional Information:Funded by Extended: Finite Element Modelling of the Deep Zone Residual Stresses in Rolling/Sliding Contact Bearing Elements
Uncontrolled Keywords:Bearing Steel; Diffusion; Microstructural Alterations; Rolling Contact Fatigue; Tempering
Group:Faculty of Science & Technology
ID Code:37801
Deposited By: Symplectic RT2
Deposited On:15 Nov 2022 13:42
Last Modified:24 Nov 2022 09:53


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