Oladokun, AO orcid.org/0000-0003-2361-987X, Pettersson, MP, Bryant, MB orcid.org/0000-0003-4442-5169 et al. (4 more authors) (2015) Fretting of CoCrMo and Ti6Al4V Alloys in Modular Prostheses. Tribology - Materials, Surfaces & Interfaces, 9 (4). pp. 165-173. ISSN 1751-5831
Abstract
Implantation of a total hip replacements (THR) is an effective intervention in the management of arthritis. Modularity at the taper junction of THR was introduced in order to improve the ease with which the surgeon could modify the length of the taper section and the overall length of the replacement. Cobalt chromium (Co–28Cr–6Mo) and titanium (Ti–6Al–4V) alloys are the most commonly used materials for the device. This study investigates the fretting behaviour of both CoCr–CoCr and CoCr–Ti couplings and analyses their damage mechanisms. A reciprocating tribometer ball on plate fretting contact was instrumented with in situ electrochemistry to characterise the damage inflicted by tribocorrosion on the two couplings. Fretting displacements amplitudes of 10, 25 and 50 mm at an initial contact pressure of 1 GPa were assessed. The results reveal larger metallic volume loss from the CoCr–CoCr alloy compared to the CoCr–Ti alloy, and the open circuit potential indicates a depassivation of the protective oxide layer at displacement amplitudes .25 mm. In conclusion, the damage mechanisms of CoCr–CoCr and CoCr–Ti fretting contacts were identified to be wear and fatigue dominated mechanisms respectively.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | (c) 2015, Institute of Materials, Minerals and Mining and W. S. Maney & Son Ltd. This is an author produced version of a paper published in Tribology: Materials, Surfaces and Interfaces. Uploaded in accordance with the publisher's self-archiving policy |
Keywords: | Fretting; Corrosion; Orthopeadics; CoCr; Ti6Al4V; Taper junction; Modularity |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Functional Surfaces (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Jul 2015 13:39 |
Last Modified: | 12 Dec 2024 12:11 |
Published Version: | http://dx.doi.org/10.1179/1751584X15Y.0000000014 |
Status: | Published |
Publisher: | Maney Publishing |
Identification Number: | 10.1179/1751584X15Y.0000000014 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:87371 |