Bryant, MG orcid.org/0000-0003-4442-5169, Buente, D, Oladokun, A et al. (4 more authors) (2017) Surface and subsurface changes as a result of tribocorrosion at the stem-neck interface of bi-modular prosthesis. Biotribology, 10. pp. 1-16. ISSN 2352-5738
Abstract
This study presents a detailed multi-scale analysis of the degradation processes occurring on both the CoCrMo and TMZF alloy surfaces at different regions across the taper interface. Co-ordinate measurement machine, scanning electron microscopy, transmission electron microscopy and X-ray Diffraction methods have been utilised to identify the roles of degradation from the mm to nm scale. Dependant on the region of interest, varying topographies and subsurface morphologies were observed across both surfaces. In regions where high pressures are expected, retention of the surface topography was seen on the CoCrMo trunnion. This was complimented by gross shear and plastic deformation of the subsurface material. In regions where maximum penetration was seen, evidence of fretting-corrosion was seen and a loss of the nano-crystalline layer. For the TMZF surface, refinement of the alloy was seen in the top 5 μm, with fatigue cracks within the bulk present. Precipitation and formation of oxide species were observed at depths of 2 μm. The degradation of bi-modular prosthesis is a complex multifactorial process. It is hypothesised that this formation of oxide species at the interface and within the bulk alloy play an important role in the degradation through a combined work-hardening and corrosion process.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Elsevier Ltd. This is an author produced version of a paper published in Biotribology. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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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) |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Mar 2017 10:30 |
Last Modified: | 12 Jul 2018 04:57 |
Published Version: | https://doi.org/10.1016/j.biotri.2017.02.002 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.biotri.2017.02.002 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:113348 |