The significance of near surface microstructure in the wear process

Rigney, D.A.; Glaeser, W. A.

doi:10.1016/0043-1648(78)90125-4

Cited by 140 publications

(44 citation statements)

References 19 publications

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“…Mo + AlSi, with contrasting properties. It has also been experimentally observed that microstructures such as dislocation cells develop at heavily deformed fragmented layers during sliding contact (Rigney & Glaeser 1978). The appearance and/or subsequent development of such microstructural inhomogeneities during service will a¬ect the local material properties and hence the wear behaviour.…”

Section: Discussionmentioning

confidence: 99%

A micromechanics investigation of sliding wear in coated components

Yan

O’Dowd

2000

Proc. R. Soc. Lond. A

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In this work, the wear behaviour of coated components subjected to sliding contact conditions is investigated using a multiscale micromechanics approach. Periodic unitcell-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 in®uence 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 on coating thickness and the roughness of the counterpart surface. It was also found that a reduction in the friction coe¯cient and an increase in the coating strain hardening behaviour can considerably improve the wear resistance of coated components.

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Section: Discussionmentioning

confidence: 99%

A micromechanics investigation of sliding wear in coated components

Yan

O’Dowd

2000

Proc. R. Soc. Lond. A

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“…Thus, the obvious scratches and grooves are likely being brought about by severe plastic deformation of surfaces but without any distinct wear loss, as indicated in [37,47]. By the increasing numbers of cycles the interfacial medium is further mixed into such severely deformed near-surface material, which is accompanied by a grain refinement down to the nanoscale [48][49][50][51][52]. This hypothesis is further supported by the observed coefficient of friction, which promotes near-surface plastic deformation over sub-surface plasticity.…”

Section: Wear Mechanisms and Tribological Behaviormentioning

confidence: 99%

On the Growth Rate of Tribomaterial in Bovine Serum Lubricated Sliding Contacts

et al. 2016

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Considering total hip arthroplasty, so-called tribolayers (aka tribomaterial), consist of carbonaceous material from the periprosthetic joint fluid or bovine serum mixed with nanometer size metal and oxide wear particles. Currently, its growth sequence and rate are unknown. Thus, smooth surfaces of low-Carbon (LC-) vs. high-Carbon (HC-)CoCrMo (Cobalt-Chromium-Molybdenum) alloys have been worn in a conforming contact under bovine serum lubrication by means of a pin-on-ball wear tester. These tests were interrupted at certain numbers of cycles in order to weigh the specimens, characterize the topography, and investigate the wear appearances. In addition, after cleaning in ethanol and anionic detergent, before-and-after comparison rendered the weight of the tribomaterial. This revealed that, during run-in, the specimens gained weight by generating tribomaterial. Afterwards the loss of material surpassed the generation of new tribomaterial and a steady weight-loss was measured. Topography measurements were used as input data for contact mechanics calculations. Apparently the incipient, locally high contact stresses accelerated tribochemical reactions. After run-in, the contact situation changes and leads to a much smaller generation rate. This paper provides information about the growth sequence and rate of such tribomaterial formation. It further highlights the significance of highly localized contact stress as an important factor for tribomaterial generation.

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“…The following equation may provide guidelines for more quantitative tests. Phenomenologically, the wear (volume per time) may be given as w = f(A, F, L, l/KIc, 1/H) (ASM International, 1992;Bhushan and Gupta, 1991;Rigney and Glaeser, 1978), such as…”

Section: Dispersion Of Unstable Reprecipitatesmentioning

confidence: 99%

Long-term kinetic effects and colloid formations in dissolution of LWR spent fuels

Ahn¹

1996

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The significance of near surface microstructure in the wear process

Cited by 140 publications

References 19 publications

A micromechanics investigation of sliding wear in coated components

A micromechanics investigation of sliding wear in coated components

On the Growth Rate of Tribomaterial in Bovine Serum Lubricated Sliding Contacts

Long-term kinetic effects and colloid formations in dissolution of LWR spent fuels

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