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

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

Authors

R. Ahmed

H.L. de Villiers Lovelock

N.H. Faisal

S. Davies



Abstract

This investigation considered the multiscale tribo-mechanical evaluations of CoCrMo (Stellite{reg}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.

Journal Article Type Article
Publication Date Dec 1, 2014
Journal Tribology international
Print ISSN 0301-679X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 80
Pages 98-114
Institution 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
DOI https://doi.org/10.1016/j.triboint.2014.06.015
Keywords Nanotribology; Nanoscratch; Wear; Manufacturing

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