Abstract
ABSTRACT It has been known for decades that high contact load in bearings leads to fatigue alterations of subsurface material, which can be optically visualized on etched samples. In the literature, these alterations are termed dark etching regions and white etching bands, due to their peculiar patterns and contrast. In the current work, it is proposed to study these alterations by the magnetooptical Kerr effect, expecting that the material changes associated with rolling contact fatigue also affect the magnetic properties of bearing steel. The advantage of this method is that it has good spatial resolution, allowing recording of magnetic properties on microscopic scales. Samples containing dark etching regions and white etching bands were compared in the magnetooptical test with the reference sample containing no optically visible changes. It was found that the coercive force of material reduces as result of microstructural changes caused by rolling contact fatigue.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.