About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
Presentation Title |
Mechanism of Microstructural Decay from a Detailed Characterization of 52100 Bearing Steel after Rolling Contact Fatigue |
Author(s) |
Tania Loaiza, Prasath Babu Revathy Rajan, Steve Ooi, Peter Hedström |
On-Site Speaker (Planned) |
Tania Loaiza |
Abstract Scope |
Subsurface-initiated rolling contact fatigue is commonly encountered beneath highly loaded hard contacts in components such as gears, bearings, and cams. Significant microstructural alterations can be introduced during RCF conditions, which can initiate bearing failures. In this study, the microstructural decay beneath the RCF-tested surface of a typical 52100 bearing steel was studied. The RCF test was conducted at a maximum contact pressure of 4 GPa with different stress cycles number. Microstructural characterization was performed by means of scanning electron microscopy, electron backscatter diffraction, transmission Kikuchi diffraction and transmission electron microscopy (TEM). The microstructure alterations observed were; (1) The dissolution of carbides; (2) The creation of elongated ferrite and equiaxed ferrite; (3) The generation of dislocation cells; (4) The appearance of nucleating lenticular carbides. This study establishes a correlation between the microstructure decay during RCF to the rearrangement of dislocations, which also affect the carbon distribution from the initial microstructure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Other, Other |