Structure-property relationships in a CoCrMo alloy at micro and nano-scales.

Ahmed, R.; de Villiers Lovelock, H.L.; Faisal, N.H.; Davies, S.

Abstract

This investigation considered the multiscale tribo-mechanical evaluations of CoCrMo (Stellite®21) alloys manufactured via two different processing routes of casting and HIP-consolidation from powder (Hot Isostatic Pressing). These involved hardness, nanoscratch, impact toughness, abrasive wear and sliding wear evaluations using pin-on-disc and ball-on-flat tests. HIPing improved the nanoscratch and ball-on-flat sliding wear performance due to higher hardness and work-hardening rate of the metal matrix. The cast alloy however exhibited superior abrasive wear and self-mated pin-on-disc wear performance. The tribological properties were more strongly influenced by the CoCr matrix, which is demonstrated in nanoscratch analysis.

Citation

AHMED, R., DE VILLIERS LOVELOCK, H.L., FAISAL, N.H. and DAVIES, S. 2014. Structure-property relationships in a CoCrMo alloy at micro and nano-scales. Tribology international [online], 80, pages 98-114. Available from: https://doi.org/10.1016/j.triboint.2014.06.015

• Journal Article Type: Article
• Acceptance Date: Jun 22, 2014
• Online Publication Date: Jul 5, 2014
• Publication Date: Dec 31, 2014
• Deposit Date: Sep 19, 2016
• Publicly Available Date: Sep 19, 2016
• Journal: Tribology international
• Print ISSN: 0301-679X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 80
• Pages: 98-114
• DOI: https://doi.org/10.1016/j.triboint.2014.06.015
• Keywords: Nanotribology; Nanoscratch; Wear; Manufacturing
• Public URL: http://hdl.handle.net/10059/1756