The quality of rail steel has improved greatly in recent years and the material is more resistant to wear, plastic deformation and crack initiation; but track forces have also increased, and cracking of rails is a major concern. Different steel microstructures have different wear and rolling contact fatigue (RCF) behaviours when subject to cyclic, rolling-sliding, compressive contact. In order to capture the differences, it is necessary to model these at a microstructural level. This paper describes the development of microstructural models for incorporation into a wear and crack initiation model. A new mechanism is introduced which distinguishes RCF lives of pearlitic microstructures with different percentage volumes of pro-eutectoid ferrite.


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    Title :

    Modelling rail steel microstructure and its effect on crack initiation


    Contributors:
    Franklin, F.J. (author) / Garnham, J.E. (author) / Fletcher, D.I. (author) / Davis, C.L. (author) / Kapoor, A. (author)


    Publication date :

    2008


    Size :

    10 Seiten, 8 Bilder, 6 Tabellen, 36 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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