A micromechanics investigation of sliding wear in coated components

Article


Yan, Wenyi, 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. https://doi.org/10.1098/rspa.2000.0617
Article Title

A micromechanics investigation of sliding wear in coated components

ERA Journal ID39856
Article CategoryArticle
AuthorsYan, Wenyi (Author), Busso, Esteban P. (Author) and O'Dowd, Noel P. (Author)
Journal TitleProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Journal Citation456 (2002), pp. 2387-2407
Number of Pages21
Year2000
PublisherRoyal Society Publishing
Place of PublicationLondon, United Kingdom
ISSN1364-5021
1471-2946
Digital Object Identifier (DOI)https://doi.org/10.1098/rspa.2000.0617
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.

Keywordssliding wear; micromechanics; wear-resistant coatings; rachetting; wear rate
ANZSRC Field of Research 2020401708. Tribology
401605. Functional materials
401706. Numerical modelling and mechanical characterisation
Public Notes

© 2000 The Royal Society. Accepted version deposited in accordance with the copyright policy of the publisher.

Byline AffiliationsImperial College London, United Kingdom
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