A New Methodology for Predicting Fatigue Properties of Bearing Steels: From X-Ray Micro-Tomography and Ultrasonic Measurements to the Bearing Lives Distribution

    Volume 7, Issue 3 (March 2010)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 4 February 2010

    Page Count: 14


    Stienon, Alexandre
    Saint-Gobain, European Research Center (CREE), Cavaillion,

    Fazekas, Arnaud
    Assistant Professor, Université de Lyon, INSA Lyon, Lab. MATEIS, UMR CNRS 5510, Villeurbanne,

    Buffiere, Jean-Yves
    Professor, Université de Lyon, INSA Lyon, Lab. MATEIS, UMR CNRS 5510, Villeurbanne,

    Daguier, Pascal
    Research Group Manager, ASCOMETAL CREAS BP 70045, Hagondange Cedex,

    Merchi, Ferhat
    Research Engineer, ASCOMETAL CREAS BP 70045, Hagondange Cedex,

    Vincent, Alain
    Professor, Université de Lyon, INSA Lyon, Lab. MATEIS, UMR CNRS 5510, Villeurbanne,

    (Received 18 May 2009; accepted 17 December 2009)

    Abstract

    This work aims at developing a new methodology for predicting the distribution of fatigue lives of bearings versus steel microstructure, namely, concentration, morphology, and properties of residual inclusions in steel. On the experimental side, X-ray micro-tomography and high frequency ultrasonic testing are used to provide the required inclusion characteristics. A physically based model is used to compute the number of cycles to crack nucleation and crack propagation up to the surface. For the statistics predictions, the inclusions and/or stringers are distributed randomly in the bearing steel according to the concentration of stringers provided by ultrasonic data. The distributions of the fatigue lives predicted by the model are compared successfully to the experimental distributions determined by fatigue tests performed on flat washer machines. Finally, it is shown that the model is able to predict the influence of the orientation of stringers on the fatigue lives.


    Paper ID: JAI102532

    DOI: 10.1520/JAI102532

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    Author
    Title A New Methodology for Predicting Fatigue Properties of Bearing Steels: From X-Ray Micro-Tomography and Ultrasonic Measurements to the Bearing Lives Distribution
    Symposium Eighth International Symposium on Bearing Steel Technologies: Developments in Rolling Bearing Steels and Testing, 2009-05-22
    Committee A01