Further investigations and parametric analysis of microstructural alterations under rolling contact fatigue

Journal article


Abdullah, U. and Khan, Z.A. 2022. Further investigations and parametric analysis of microstructural alterations under rolling contact fatigue. Materials. 15 (22), p. 8072. https://doi.org/10.3390/ma15228072
AuthorsAbdullah, U. and Khan, Z.A.
Abstract

Bearing elements under rolling contact fatigue (RCF) exhibit microstructural features, known as white etching bands (WEBs) and dark etching regions (DERs). The formation mechanism of these microstructural features has 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. Furthermore, bearing balls are subjected to static load tests in order to evaluate the effect of lattice deformation. 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.

KeywordsBearing steel; Diffusion; Microstructural alterations; Rolling contact fatigue; Tempering
Year2022
JournalMaterials
Journal citation15 (22), p. 8072
PublisherMDPI
ISSN1996-1944
Digital Object Identifier (DOI)https://doi.org/10.3390/ma15228072
Official URLhttps://www.mdpi.com/1996-1944/15/22/8072
Publication dates
Online15 Nov 2022
Publication process dates
Accepted11 Nov 2022
Deposited12 Jun 2023
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Output statusPublished
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