About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Multi Scale Modeling of Microstructure Deformation in Material Processing
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Presentation Title |
Multi Scale Modeling with Microstructure Characteristics of Martensitic Steel for Rolling Contact Fatigue Life Prediction |
Author(s) |
Jinheung Park, Kijung Lee, Soonwoo Kwon, Myoung-gyu Lee |
On-Site Speaker (Planned) |
Jinheung Park |
Abstract Scope |
Bearing steels under rolling contact fatigue (RCF) typically have martensitic microstructure with high carbon contents to enhance resistance to cyclic contact stress in harsh environment. Under the RCF condition, the martensitic transformation of retained austenite and mechanical softening resulted from microstructural alterations occur at the subsurface of bearing steel. These microstructure effects combined with external loadings initiate cracks at subsurface and eventually leads to failure. The objective of this study is to predict the RCF life-span considering the microstructure characteristics of martensitic bearing steel. For this purpose, the hierarchical multiphase microstructure is virtually generated using Voronoi tessellation. Also, the crystal plasticity finite element model is extended by incorporating the microstructural alterations based on the dislocation-assisted carbon migration theory and the deformation-induced martensitic transformation. The crystal plasticity simulation coupled with the continuum damage mechanics enables to predict the RCF life-span. |