Wear mechanisms and finite element crack propagation analysis of high speed roller bearings

Tunca, N.; Laufer, E. E.

doi:10.1016/0043-1648(87)90006-8

Cited by 9 publications

(3 citation statements)

References 36 publications

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“…A second type of WEA reported in reference [42] are formed extensively (about 20 mm deep) below the tooth surface. They resemble more the WEA reported and identified in reference [43] as cementite rather than the WEB reported in bearings. It was shown recently [44] that the decay of martensite develops similarly in specimens subjected to rolling/sliding loading, both in discs and in gears.…”

Section: Introductionsupporting

confidence: 86%

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Martensite decay in micropitted gears

Oila

Shaw

Aylott

et al. 2005

Proceedings of the Institution of Mechanical Engineers, Part J:

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Metallographic examination performed on a number of micropitted gears has revealed microstructural features similar to those reported in the literature in fatigued bearings, namely, dark etching regions and white etching bands. In addition, a new type of fatigueinduced microstructural constituent was observed close to the surface below asperities referred to as the plastic deformation region. Finally, it is shown that the initiation and propagation of cracks leading to the formation of micropits are related to the phase transformations mentioned previously.

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Section: Introductionsupporting

confidence: 86%

“…In reference [43], the formation of a white etching layer at the bearing surface was reported and this constituent was identified as cementite with 6.65 wt.% C and 0.5 wt.% Cr. The source of carbon for cementite formation would be the lubricant which decomposes as a result of rolling and frictional heating.…”

Section: Plastic Deformation Regionmentioning

confidence: 99%

Martensite decay in micropitted gears

Oila

Shaw

Aylott

et al. 2005

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…It occurs beneath the raceway and over the whole circumference of the bearing ring. Apart from inner rings, DERs have also been observed in various types of specimens and components that have been subject to RCF [20,[28][29][30].…”

Section: Factors That Affect the Formation Of Dersmentioning

confidence: 99%

Dark etching regions under rolling contact fatigue: A review

Restrepo

Ooi

Yan

et al. 2021

Materials Science and Technology

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Bearing performance depends on the ability of steel to cope with a large number of stress cycles. Long bearing lives are possible because the microstructure of bearing steel has excellent resistance to Rolling Contact Fatigue (RCF). Nevertheless, it is observed that the microstructure suffers changes in the region where the maximum Hertzian contact stress occurs. Here we give an overview of the present knowledge in the area of the formation of dark etching regions (DERs) during RCF. Factors that influence the formation of DERs, various types of characterisation techniques, and the observations made in the literature are discussed. In addition, the applicability of several proposed simulation models of the formation of DERs is discussed.

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