Correlation between the formation of tribofilm and repassivation in biomedical titanium alloys during tribocorrosion

Yidong Xu; Jiahui Qi; John Nutter; Joanne Sharp; Mingwen Bai; Le Ma; W.M. Rainforth

doi:10.1016/j.triboint.2021.107147

Correlation between the formation of tribofilm and repassivation in biomedical titanium alloys during tribocorrosion

Yidong Xu, Jiahui Qi, John Nutter, Joanne Sharp, Mingwen Bai, Le Ma, W.M. Rainforth

University of Sheffield

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

121 Downloads (Pure)

Abstract

Titanium alloys are widely used in the field of orthopaedics, however, poor tribological performance arising from the low shear resistance and weak protection of the oxide layer limits their applicability. In this work, the tribocorrosion behaviour of novel β and α + β biomedical titanium alloys were studied in bovine serum solution under open circuit potential. Ti-5Mo-Fe-3Sn and Ti-6Al-4V ELI alloys were found to have the capability to repassivate when testing at a slower sliding speed. Scanning and transmission electron microscopy results revealed that the repassivation was mainly associated with the greater tribofilm formation on the worn surface, rather than an oxide film. The tribolayer performed as a solid lubricating film, which stabilised the coefficient of friction.

Original language	English
Article number	107147
Number of pages	12
Journal	Tribology International
Volume	163
Early online date	24 Jun 2021
DOIs	https://doi.org/10.1016/j.triboint.2021.107147
Publication status	Published - Nov 2021

Bibliographical note

© 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-
NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

Funder

This work was supported by the Henry Royce Institute for Advanced Materials under EPSRC Grant EP/R00661X/1 and also the EPSRC Programme Grant, Friction: The Tribology Enigma, EP/R001766/1 .

Keywords

Titanium alloys
Tribocorrosion
Repassivation
Tribofilm
Electron microscopy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Surfaces, Coatings and Films
Surfaces and Interfaces

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10.1016/j.triboint.2021.107147

Post-PrintAccepted author manuscript, 1.05 MBLicence: CC BY-NC-ND

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abstract = "Titanium alloys are widely used in the field of orthopaedics, however, poor tribological performance arising from the low shear resistance and weak protection of the oxide layer limits their applicability. In this work, the tribocorrosion behaviour of novel β and α + β biomedical titanium alloys were studied in bovine serum solution under open circuit potential. Ti-5Mo-Fe-3Sn and Ti-6Al-4V ELI alloys were found to have the capability to repassivate when testing at a slower sliding speed. Scanning and transmission electron microscopy results revealed that the repassivation was mainly associated with the greater tribofilm formation on the worn surface, rather than an oxide film. The tribolayer performed as a solid lubricating film, which stabilised the coefficient of friction.",

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AU - Rainforth, W.M.

N1 - © 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial- NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

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N2 - Titanium alloys are widely used in the field of orthopaedics, however, poor tribological performance arising from the low shear resistance and weak protection of the oxide layer limits their applicability. In this work, the tribocorrosion behaviour of novel β and α + β biomedical titanium alloys were studied in bovine serum solution under open circuit potential. Ti-5Mo-Fe-3Sn and Ti-6Al-4V ELI alloys were found to have the capability to repassivate when testing at a slower sliding speed. Scanning and transmission electron microscopy results revealed that the repassivation was mainly associated with the greater tribofilm formation on the worn surface, rather than an oxide film. The tribolayer performed as a solid lubricating film, which stabilised the coefficient of friction.

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Correlation between the formation of tribofilm and repassivation in biomedical titanium alloys during tribocorrosion

Abstract

Bibliographical note

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Keywords

ASJC Scopus subject areas

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