Tribological effects of laser surface texturing and residual stress
Abstract
Purpose
The purpose of this paper is to investigate the tribological effects of laser surface texturing (LST) and residual stress on functional surfaces.
Design/methodology/approach
Three different surface textures (circular dimple, elliptical dimple and groove) with two different textured area ratios (10 and 20 per cent) are designed and fabricated by a Picosecond Nd YAG Laser machine. The friction and wear performance of textured specimens is tested using a UMT-2 friction and wear testing machine in mixed lubrication.
Findings
Test results show that elliptical dimples exhibit the best performance in wear resistance, circular dimples in friction reduction and grooves in stabilization of friction. The surfaces with larger textured area density exhibit better performance in both friction reduction and wear resistance. The improved performance of LST is the coupled effect of surface texture and residual stress.
Originality/value
The findings of this study may provide guidance for optimal design of functional surface textures in reciprocating sliding contacts under mixed or hydrodynamic lubrication, which can be used in automotive and other industrial applications.
Keywords
Acknowledgements
The authors gratefully acknowledge the financial supports from the National Natural Science Foundation of China (No. 51275126) and the Open Foundation of the State Key Laboratory of Tribology at Tsinghua University (No. SKLTKF12B10).
Citation
Wang, S., Yan, F. and Chen, A. (2018), "Tribological effects of laser surface texturing and residual stress", Industrial Lubrication and Tribology, Vol. 70 No. 1, pp. 126-132. https://doi.org/10.1108/ILT-11-2016-0282
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited