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Rolling contact fatigue life; coating; friction; wear; thermal spraying.

The application of coating gets exceptional importance since it improves the tribological properties of the contacting surfaces. Different input parameters like coating deposition processes, coating material properties and its thickness, use of lubricant and its additives, surface roughness and temperature affect thetribological properties and the rolling contact fatigue (RCF) life of coated rolling and sliding contact elements. In this paper, an attempt has been made to review for the clear understanding of the effect of these input parameters on the RCF life and tribological performance of coated rolling and sliding contact elements. It hasbeen observed that coating deposition process must be chosen based on technical and economic aspects. Among the different techniques, thermal spraying technique is cost effective, and it also provides better bonding strength, which improves the RCF life in comparison with other techniques. Similarly, the effect of other input parameters has been reviewed and possible combination of the input parameters that help improve the performance of coated contacting elements summarized. Furthermore, the current status of research and the scopeof future work to be carried out, in this area, have been outlined.

A V BORGAONKAR¹ I SYED¹

1. Department of Mechanical Engineering, National Institute of Technology Warangal, Warangal 506004, India

Published

January 2020

Manuscript received

20 January 2018

Manuscript revised

7 December 2019

Accepted

16 December 2019

Final version published online

24 January 2020