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Dry Sliding Friction and Wear Performance of HVOF Sprayed WC–Co Coatings Deposited on Aluminium Alloy

Journal of The Institution of Engineers (India): Series D volume 102, pages 331–344 (2021)Cite this article

Abstract

The tribological behaviour of WC–Co Cermet coatings coated on Al6061 alloy was studied in this work. WC–Co Cermet coatings have been coated with different thicknesses by changing the amount of the cobalt using HVOF (High velocity oxy fuel technique). The coatings produced have been subjected to microhardness, friction and wear testing. A disc and pin type machine has been used for assessing friction and wears characteristics. The influence on tribological performance of coating thickness and cobalt levels was examined and compared with aluminium alloy. WC–Co coating enhanced hardness by 34% and 42% in 100 and 200 micron thicknesses respectively, compared to aluminium alloy. The wear rate and the coefficient of friction are decreased by 48 and 12%, respectively, compared to uncoated aluminium alloy. Both coatings and substrates increase their wear rate and friction coefficient (COF) with the increase in load and sliding speed. Scanning Electron and Confocal microscopy examinations of worn surfaces were carried out to evaluate coating wear processes.

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Funding

The authors wish to acknowledge their sincere thanks to Vision Group on Science and Technology (VGST) Government of Karnataka, INDIA, for sponsoring this research work (Project No.: KSTePS/VGST/RGS/F/2018-19/GRD-798).

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Authors and Affiliations

  1. Department of Mechanical and Automobile Engineering, CHRIST (Deemed to be University), Bangalore, India

    G. S. Pradeep Kumar, V. Umesh, Yash Yadav, Talha Toufeeq & Sakshi Arun

  2. Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bangalore, India

    R. Keshavamurthy

  3. Department of Automobile Engineering, Dayananda Sagar College of Engineering, Bangalore, India

    Vijay Tambrallimath

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  1. G. S. Pradeep Kumar
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  2. R. Keshavamurthy
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  3. V. Umesh
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Correspondence to R. Keshavamurthy.

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Pradeep Kumar, G.S., Keshavamurthy, R., Umesh, V. et al. Dry Sliding Friction and Wear Performance of HVOF Sprayed WC–Co Coatings Deposited on Aluminium Alloy. J. Inst. Eng. India Ser. D 102, 331–344 (2021). https://doi.org/10.1007/s40033-021-00282-1

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  • DOI: https://doi.org/10.1007/s40033-021-00282-1

Keywords

  • HVOF coatings
  • WC–Co
  • Al6061 alloy
  • Friction and wear
  • Hardness