Modeling the Influence of Microstructure in Rolling Contact Fatigue

    Volume 7, Issue 2 (February 2010)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 21 December 2009

    Page Count: 20


    Alley, Erick S.
    The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA

    Sawamiphakdi, Krich
    Timken Research Center, Canton, OH

    Anderson, Patrick I.
    Timken Research Center, Canton, OH

    Neu, Richard W.
    The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA

    (Received 19 June 2009; accepted 23 October 2009)

    Abstract

    Crack nucleation, first spall generation, and spall growth in rolling contact fatigue (RCF) are known to be highly sensitive to the heterogeneity of the microstructure. Yet the current state-of-the-art in the design of high performance bearing materials and microstructures is highly empirical requiring substantial lengthy experimental testing to validate the reliability and performance of these new materials and processes. We have laid the groundwork necessary to determine the influence of microstructure in RCF to aid in the development and processing of bearing steels. Microstructure attributes that may control the fatigue behavior are explicitly modeled in a 41xxx steel. The methodology is demonstrated by studying the role of an aluminum oxide inclusion embedded in a matrix of tempered martensite and retained austenite. The matrix is represented by crystal plasticity, which provides more realistic accumulations of localized plastic strains with cycling compare to homogenized J2 plasticity. As a demonstration of the approach, the relative influence of the volume fraction of retained austenite on RCF is evaluated.


    Paper ID: JAI102629

    DOI: 10.1520/JAI102629

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    Author
    Title Modeling the Influence of Microstructure in Rolling Contact Fatigue
    Symposium Eighth International Symposium on Bearing Steel Technologies: Developments in Rolling Bearing Steels and Testing, 2009-05-22
    Committee A01