Competition between surface and subsurface rolling contact fatigue failures of nitrided parts: A Dang Van approach

Mechanical contacts in rolling element bearings and gears are increasingly loaded nowadays. In high temperature applications, surface treatments such as gas-nitriding are used to increase their rolling contact fatigue life. This study focuses on the prediction of the location of crack initiation for...

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Bibliographic Details
Published in:Tribology international 2019-12, Vol.140, p.105888, Article 105888
Main Authors: Bossy, E., Noyel, J.P., Kleber, X., Ville, F., Sidoroff, C., Thibault, S.
Format: Article
Language:English
Subjects:
Crack initiation
Damage
Engineering Sciences
Fatigue
Fatigue failure
Fatigue life
Finite element method
Fracture mechanics
High temperature
Material properties
Materials
Mesoscopic
Nitriding
Roller bearings
Rolling contact
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Summary:Mechanical contacts in rolling element bearings and gears are increasingly loaded nowadays. In high temperature applications, surface treatments such as gas-nitriding are used to increase their rolling contact fatigue life. This study focuses on the prediction of the location of crack initiation for gas-nitrided steels subjected to rolling contact fatigue taking into account the material property gradients induced by the nitriding process. Several approaches based on the Dang Van criterion are compared to experimental data to find the most reliable prediction model. •The microyield stress is used to describe a realistic local fatigue behavior .•The Dang Van multiaxial criterion is used for gas nitrided steels .•The depth of the critical points corresponds to experimentally obtained cracks .
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2019.105888