Effect of Potential and Microstructure on the Tribocorrosion Behaviour of Beta and Near Beta Ti Alloys I

Q2 Materials Science

Biotribology Pub Date : 2020-12-01 DOI:10.1016/j.biotri.2020.100141

Mozart Queiroz Neto, W. Mark Rainforth

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引用次数: 7

Abstract

Current hip prostheses make extensive use of Ti-6Al-4 V alloy. This material was originally designed for aerospace applications. Moreover, its poor tribological properties are well known. However, beta, or near beta Ti alloys are known to have superior properties in that its elastic modulus is closer to that of bone coupled with a good fatigue resistance. Therefore, this work aims to analyse the tribocorrosion behaviour of 4 different titanium alloys (Ti-13Nb-13Zr, Ti-12Mo-6Zr-2Fe and Ti–29Nb–13Ta–4.6Zr aged at 300 °C and at 400 °C) at anodic potential, OCP and cathodic potential at 0.5 N, 1 N and 2 N in bovine serum to identify the main cause of material degradation, effect of microstructure and the synergism between corrosion and wear. The results show the alloys become more active when subjected to sliding in all conditions, but the material loss is lower at anodic potential. Finally, at anodic potential wear is lower than at cathodic potential which is explained by increase in the mechanical wear at cathodic potential.

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电位和微观结构对β和近βTi合金摩擦学行为的影响Ⅰ

目前的髋关节假体广泛使用ti - 6al - 4v合金。这种材料最初是为航空航天应用而设计的。此外，其较差的摩擦学性能也是众所周知的。然而，已知β或近β Ti合金具有优越的性能，因为它的弹性模量更接近骨骼，并且具有良好的抗疲劳性。因此，本研究旨在分析4种不同钛合金(Ti-13Nb-13Zr、Ti-12Mo-6Zr-2Fe和Ti-29Nb-13Ta-4.6Zr)在牛血清中0.5 N、1 N和2 N的阳极电位、OCP和阴极电位下的摩擦腐蚀行为，以确定材料降解的主要原因、微观结构的影响以及腐蚀和磨损之间的协同作用。结果表明，在所有条件下，合金在受到滑动时都变得更活跃，但在阳极电位下材料损失更低。最后，阳极电位下的磨损小于阴极电位下的磨损，这可以解释为阴极电位下机械磨损的增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biotribology Materials Science-Surfaces, Coatings and Films

CiteScore

4.20

自引率

0.00%

发文量

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