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Rolling contact fatigue in martensitic 100Cr6: Subsurface hardening and crack formation


Type

Article

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Authors

Kang, JH 
Vegter, RH 
Rivera-Díaz-del-Castillo, PEJ 

Abstract

Rolling contact fatigue tests on 100Cr6 steel were carried out with a ball-on-rod tester. Microstructural damage was manifested by gradual hardness changes under the subsurface, and microcracks formed adjacent to inclusions; both being evidence of plastic deformation. The hardness increase appears to be due to the development of residual stress, while the microcracks form as a result of the concentration of stress around inclusions. The microcrack orientation is suggested to be affected by the stress state, depending on the degree of residual stresses generated. The residual stress development may be a key factor for optimising the bearing element testing methods, by considering its influence on the damage morphology.

Description

Keywords

Fatigue, Hardening, Martensite, Steel, Hardness measurement, Light microscopy

Journal Title

Materials Science and Engineering: A

Conference Name

Journal ISSN

0921-5093
1873-4936

Volume Title

607

Publisher

Elsevier BV
Sponsorship
This work was supported by SKF Engineering & Research Centre and financed by SKF AB.