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Study on the tribological properties of titanium alloys sliding against WC-Co during the dry friction

Qiulin Niu (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China)
Xiaohu Zheng (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China)
Ming Chen (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China)
Weiwei Ming (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 4 March 2014

395

Abstract

Purpose

Titanium alloy has the excellent performance and been widely utilized in aeroengine and airframe manufacture. However, improving the understanding of all aspects of titanium alloy is necessary. The purpose of this paper is to investigate the tribological properties of two typical titanium alloys against tungsten carbide under dry friction.

Design/methodology/approach

Reciprocating ball-disc friction tests were carried out at room temperature in different loading without lubricant to investigate the friction properties of TA19/WC-Co and TC18/WC-Co friction pairs. The influence of the load on the friction coefficient and friction force was analyzed. The worn surfaces of TA19 and TC18 specimens were observed by the digital microscopy and scanning electron microscopy (SEM). And the wear mechanism was discussed.

Findings

The results show that the friction coefficients decreased with the increase in the normal load. However, the reduction in the friction coefficient for the TC18 alloy was less than that for the TA19 alloy. The dynamic friction forces with time were not quite coincident with the variation trend of the friction coefficients during the sliding friction. The results observed by the SEM and EDS revealed that several grooving were the main type of frictional wear causing the surfaces of the TA19 and TC18 alloys.

Originality/value

It is shown in the paper that the tribological property of TA19 alloy was better than that of TC18 when sliding against tungsten carbide under the dry friction conditions. The main types of damage to the TA19/WC-Co friction pair were the ploughing, the delamination fatigue associate with abrasive wear and some diffusive wear. The ploughing and abrasion were the main wear mechanisms for the surface of TC18 alloy.

Keywords

Acknowledgements

The work is supported by the Important National Science & Technology Specific Projects (2012ZX04003-051, 2012ZX04012-021, 2012ZX04003-031), National Key Basic Research Program under grant (Nos 2010CB731703 and 2011CB706804) and the National High Technology Research and Development Program of China (2009AA04Z150). And the authors would like to thank the State Key Laboratory of Tribology, Tsinghua University for doing all the friction and wear tests.

Citation

Niu, Q., Zheng, X., Chen, M. and Ming, W. (2014), "Study on the tribological properties of titanium alloys sliding against WC-Co during the dry friction", Industrial Lubrication and Tribology, Vol. 66 No. 2, pp. 202-208. https://doi.org/10.1108/ILT-11-2011-0099

Publisher

:

Emerald Group Publishing Limited

Copyright © 2014, Emerald Group Publishing Limited

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