|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Crack Growth under Rolling Contact Fatigue: 3D Characterisation and Modelling
||Pedro Rivera-Diaz-del-Castillo, Jakub J. Rydel, Gael Guetard, Hanwei Fu, Haiwen Luo
|On-Site Speaker (Planned)
A model for crack growth, resulting from 3D characterisation of components undergoing rolling contact fatigue (RCF), is presented. The model uniquely describes crack lengthening and number density as a function of contact pressure, number of cycles and position under the contact surface. It incorporates crack closure or “healing”, which is demonstrated to depend upon the ratio of von Mises to yield stress at the subsurface, and crack growth displaying logarithmic growth with respect to number of cycles. The approach, originally developed for M50 steel, is applied to 100Cr6 to guide microstructural design of bearing steels as a function of inclusion content, obtained from detailed scanning electron microscopy mapping over large areas. As an end result, our work is able to identify processing/microstructure relationships to enhance the life of bearing elements.
||Planned: Supplemental Proceedings volume