Subsurface microstructural alterations during sliding wear of biomedical metals. Modelling and experimental results

Fischer, Alfons

doi:10.1016/j.commatsci.2009.01.016

Cited by 28 publications

(14 citation statements)

References 33 publications

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“…In addition, the cross-sectional SEM images revealed a grain refinement in the near-surface region, which is thicker for the sliding tests performed at a lower contact pressure (i.e., 15 MPa) compared to the higher one (i.e., 35 MPa). The grain refinement in aluminum alloys induced by sliding has been previously reported [1,4] and can be explained by nucleation of dislocations at the surface as well as rotation of clusters [27,28]. In general, one would expect a significant deviation in the mechanical response of the worn surfaces compared to the unworn ones [29].…”

Section: Discussionmentioning

confidence: 91%

Dependence of tribofilm characteristics on the running-in behavior of aluminum–silicon alloys

et al. 2015

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In this study, we evaluate the evolution of the interfacial processes in metallic sliding contacts (i.e., aluminum alloys) in terms of their elemental composition, structural changes, and nanomechanical properties in order to understand the optimal running-in behavior leading to steady-state low friction and high wear resistance. Two different sliding conditions are used, resulting in low and high long-term friction and corresponding well with the low and high wear rates. Ex situ elemental analysis of these sliding experiments was performed by means of X-ray photoelectron spectroscopy. The mechanical properties were evaluated using nanoindentation and microcompression testing. While the elemental analysis revealed an increased oxide content for the near-surface region of the worn surfaces compared to the unworn material, the oxide content was higher for the experiments that resulted in an unfavorable tribological response (i.e., high friction and high wear). Similarly, the sub-surface grain-refined layer under these conditions was thicker compared to the experiment with a short running-in stage and low steady-state friction and wear. These observations correlated well with the nanoindentation and microcompression results, which show higher hardness and yield stress for the high friction and wear experiment. Correspondingly, low steady-state friction and wear were obtained with the formation of a thin and mechanically stable tribolayer.

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Section: Discussionmentioning

confidence: 91%

Dependence of tribofilm characteristics on the running-in behavior of aluminum–silicon alloys

et al. 2015

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“…The strain gradient is displayed along the increasing contact stresses, as computed according to Hamilton et al [53] and Fischer et al [54], and starts from the nominally stress-free bulk. Close to the surface, the so-called “sub-surface” volume undergoes multiaxial fatigue stress due to the cyclic nature of friction.…”

Section: Wear and Metallurgical Transformations In Mom Implantsmentioning

confidence: 99%

In-situ generated tribomaterial in metal/metal contacts: Current understanding and future implications for implants

et al. 2017

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Artificial hip joints operate in aqueous biofluids that are highly reactive towards metallic surfaces. The reactivity at the metal interface is enhanced by mechanical interaction due to friction, which can change the near-surface structure of the metal and surface chemistry. There are now several reports in the literature about the in-situ generation of reaction films and tribo-metallurgical transformations on metal-on-metal hip joints. This paper summarizes current knowledge and provides a mechanistic interpretation of the surface chemical and metallurgical phenomena. Basic concepts of corrosion and wear are illustrated and used to interpret available literature on in-vitro and in-vivo studies of metal-on-metal hip joints. Based on this review, three forms of tribomaterial, characterized by different combinations of oxide films and organic layers, can be determined. It is shown that the generation of these tribofilms can be related to specific electrochemical and mechanical phenomena in the metal interface. It is suggested that the generation of this surface reaction layer constitutes a way to minimize (mechanical) wear of MoM hip implants.

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“…A layer of nanocrystalline material with a grain size of 10 nm have been widely observed in CoCrMo bearing surfaces by various authors [33][34][35][36] and has even been observed on the surface of an alumina femoral head [37]. Buscher et al [34] examined the crosssection surface of retrieved low-carbon CoCrMo hip replacement, as well as pin-on-disc test.…”

Section: Subsurface Changes Of the Taper Interfacesmentioning

confidence: 99%

Characterisation of the oxide film on the taper interface from retrieved large diameter metal on polymer modular total hip replacements

Zeng

Rainforth

Cook

2015

Tribology International

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a b s t r a c tMany metal joint failures have been associated with adverse local tissue reactions due to the response of the body to wear debris and corrosion products, released from the bearing surfaces or the taper interfaces. The oxide film on the CoCrMo plays an important role in the electrochemical behaviour, however, there is a lack of quantitative data on the structure and distribution of oxides following in vivo operation. In the present study, detailed analysis of the surface layer on the taper interfaces is provided. Two retrieved taper interfaces were analysed. Site-specific FIB/TEM cross-sections show evidence of the oxide film and the carbonaceous layer. High resolution TEM results show the oxide film has porous texture and EELS confirmed it is chromium oxide.

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Subsurface microstructural alterations during sliding wear of biomedical metals. Modelling and experimental results

Cited by 28 publications

References 33 publications

Dependence of tribofilm characteristics on the running-in behavior of aluminum–silicon alloys

Dependence of tribofilm characteristics on the running-in behavior of aluminum–silicon alloys

In-situ generated tribomaterial in metal/metal contacts: Current understanding and future implications for implants

Characterisation of the oxide film on the taper interface from retrieved large diameter metal on polymer modular total hip replacements

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