A micromechanics investigation of sliding wear in coated components

Yan, Wenyi and Busso, Esteban P. and O'Dowd, Noel P. (2000) A micromechanics investigation of sliding wear in coated components. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 456 (2002). pp. 2387-2407. ISSN 1364-5021

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Abstract

In this work, the wear behaviour of coated components subjected to sliding contact conditions is investigated using a multiscale micromechanics approach. Periodic unit cell-type continuum mechanics models are used to predict localized deformation patterns at the scale of the coating thickness (mesoscale) and the rate of material removal due to repeated sliding contact. To that purpose, realistic contact loads determined at the component level (macroscale) are applied at the mesoscopic level. The results indicate that the deformation of the coating is controlled by the cyclic accumulation of plastic deformation, or ratchetting, at the coating subsurface. Based on a ratchetting failure criterion, a wear equation is proposed and applied to investigate parametrically the influence of the principal material, loading and surface roughness parameters on the wear rate. The results reveal that the wear rate increases with contact pressure and depends strongly on coating thickness and the roughness of the counterpart surface. It was also found that a reduction in the friction coefficient and an increase in the coating strain hardening behaviour can considerably improve the wear resistance of coated components.

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Item Type:	Article (Commonwealth Reporting Category C)
Refereed:	Yes
Item Status:	Live Archive
Additional Information:	© 2000 The Royal Society. Accepted version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre:	Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering (Up to 30 June 2013)
Faculty/School / Institute/Centre:	Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering (Up to 30 June 2013)
Date Deposited:	11 Oct 2007 00:15
Last Modified:	30 Aug 2013 00:11
Uncontrolled Keywords:	sliding wear; micromechanics; wear-resistant coatings; rachetting; wear rate
Fields of Research :	09 Engineering > 0913 Mechanical Engineering > 091309 Tribology 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials 09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective:	B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870399 Construction Materials Performance and Processes not elsewhere classified
Identification Number or DOI:	10.1098/rspa.2000.0617
URI:	http://eprints.usq.edu.au/id/eprint/130

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