Namus, R., Rainforth, W.M., Huang, Y. and Langdon, T.G., 2021. Effect of grain size and crystallographic structure on the corrosion and tribocorrosion behaviour of a CoCrMo biomedical grade alloy in simulated body fluid. Wear, 478-9 (August), -.
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DOI: 10.1016/j.wear.2021.203884
Abstract
CoCrMo alloys are used in hip and knee replacements due to their excellent long-term survival rates. However, high failure rates have recently been observed associated with adverse tissue reactions. CoCrMo alloy surfaces undergo microstructural changes during wear, including the formation of ε-martensite and, occasionally, a nanocrystalline surface layer. It is not clear whether these changes are beneficial or detrimental to the performance of the component. Thus, high-pressure torsion (HPT) was employed to produce different grain sizes and crystallographic structures in a CoCrMo alloy and the corrosion and tribocorrosion behaviour were critically investigated as a function of grain size. The results reveal a degradation of the corrosion resistance for the HTP processed samples. The contributions of mechanical and corrosion material loss in tribocorrosion is also examined.
Item Type: | Article |
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ISSN: | 0043-1648 |
Uncontrolled Keywords: | CoCrMo biomedical Grade alloy; High-pressure torsion; Nanocrystalline structures; Tribocorrosion |
Group: | Faculty of Science & Technology |
ID Code: | 35392 |
Deposited By: | Symplectic RT2 |
Deposited On: | 13 Apr 2021 13:44 |
Last Modified: | 01 Apr 2022 01:08 |
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