Abstract
Rolling contact tests were carried out on two copper alloys with contrasting post-yield properties. The progression of damage was investigated using scanning and transmission electron microscopy. A phosphor bronze alloy showed isotropic hardening and shakedown. In contrast, a precipitation-hardened CuNiSi alloy showed kinematic hardening and ratchetting behaviour and had poor resistance to cracking despite having a higher initial yield stress. The damage was found to be associated with slip band formation and rapid dissolution of the Ni 2Si precipitate. Results are consistent with the findings of earlier investigators on the relationship between wear, fatigue and ratchetting in rolling contact and provide a microstructural explanation for the present system. There is a close parallel with classical fatigue in other precipitation-hardened alloy systems.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
