A Pocket-Textured Surface for Improving the Tribological Properties of Point Contact under Starved Lubrication

Wei Wang; Wenhan Zhao; Yang Liu; Hui Zhang; Meng Hua; Guangneng Dong; Hon-Yuen Tam; Kwai-Sang Chin

doi:10.3390/ma14071789

A Pocket-Textured Surface for Improving the Tribological Properties of Point Contact under Starved Lubrication

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Overview

2 Scopus Citations

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Author(s)

Wenhan Zhao
Yang Liu
Hui Zhang
Guangneng Dong

Related Research Unit(s)

Department of Mechanical Engineering

Detail(s)

Original language	English
Article number	1789
Journal / Publication	Materials
Volume	14
Issue number	7
Online published	5 Apr 2021
Publication status	Published - Apr 2021

Link(s)

DOI	DOI https://doi.org/10.3390/ma14071789 Final Published version
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Attachment(s)	Documents 75353303.pdf Final Published version, 4.83 MB, PDF Publisher's Copyright Statement This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85104052117&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(2859a4db-1fa9-46e2-85b9-c1230f208cdd).html

Abstract

This paper reports a novel pocket-textured surface for improving the tribological properties of point contact under starved lubrication by possibly storing and releasing oil, and homogenizing the surface contact pressure. The ball-on-disk experimental results confirmed the coefficient of friction (COF) and wear reduction effect of such pocket-texturing. The maximum reduction rate was 40% compared with a flat surface under the same operating conditions. Analyses on experimental results attributed the oil storage effect and enhanced the secondary lubrication effect within the starved lubrication state, to become the main mechanism. In addition, the plate elasticity and the Hertzian contact principles were employed to estimate the pressure and the load acting on the surface. The experimental results and numerical analysis substantiated the design of pocket-textured surface, making it likely to enlarge about 50% of contact surface and to reduce 90% of equivalent stress in comparison to those of conventional surfaces.