Abstract
The surface-initiated rolling contact fatigue behavior of two pearlitic andthree bainitic steels has been investigated over a contact pressure ranges of 850 to 2300 MPa under water-lubricated conditions. The relationship between rolling contact fatigue life and contact pressure is nonlinear, with a transition in behavior occurring close to the theoretical shakedown limit. Above the limit, failure is characterized by shear band cracking within a work-hardened surface layer while below the limit, failure is associated with branched cracking of visibly undeformed material. The behavior of the different steels is consistent with their mechanical properties and not noticeably affected by microstructural factors.
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