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Tribological performance, electrochemical behavior and biocompatibility of high-temperature gas-nitrided Ti6Al4V alloy

Wen-Hsien Kao (Institute of Mechatronoptic Systems, Chienkuo Technology University, Changhua, Taiwan)
Yean-Liang Su (Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan)
Jeng-Haur Horng (Department of Power Mechanical Engineering, National Formosa University, Yunlin, Taiwan and Smart Machine and Intelligent Manufacturing Research Center, National Formosa University, Huwei, Yunlin, Taiwan)
Shu-Er Yang (Department of Beauty Science and Graduate Institute of Beauty Science Technology, Chienkuo Technology University, Changhua, Taiwan)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 17 July 2018

Issue publication date: 13 November 2018

109

Abstract

Purpose

This paper aims to investigate the tribology, corrosion resistance and biocompatibility of high-temperature gas-nitrided Ti6Al4V alloy.

Design/methodology/approach

The tribological properties were studied by reciprocating wear tester. The corrosion resistance was evaluated by using potentiodynamic polarization test. The purified mouse leukaemic monocyte macrophage cells are used to investigate the biocompatibility.

Findings

The results show that the nitriding treatment leads to a significant improvement in the hardness and tribological properties of Ti6Al4V alloy. Specifically, compared to untreated Ti6Al4V, the hardness increases from 3.24 to 9.02 GPa, while the wear rate reduces by 12.5 times in sliding against a Ti6Al4V cylinder and 19.6 times in sliding against a Si3N4 ball. Furthermore, the nitriding treatment yields an improved corrosion resistance and a biocompatibility similar to that of untreated Ti6Al4V.

Originality/value

The nitrided Ti6Al4V alloy is an ideal material for the fabrication of load-bearing artificial implants.

Keywords

Acknowledgements

This paper forms part of a special section “Advances in Engineering Tribology Technology (ICEATAT2016)”, guest edited by Jeng-Haur Horng.

The authors gratefully acknowledge the financial support provided to this study by the National Science Council of Taiwan under Contract No. MOST 103-2221-E270-002.

Citation

Kao, W.-H., Su, Y.-L., Horng, J.-H. and Yang, S.-E. (2018), "Tribological performance, electrochemical behavior and biocompatibility of high-temperature gas-nitrided Ti6Al4V alloy", Industrial Lubrication and Tribology, Vol. 70 No. 8, pp. 1536-1544. https://doi.org/10.1108/ILT-02-2017-0037

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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