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

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


R. Ahmed

H.L. de Villiers Lovelock

S. Davies


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.


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:

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
Keywords Nanotribology; Nanoscratch; Wear; Manufacturing
Public URL


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