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 journalpeer-review

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Author(s)

  • Wenhan Zhao
  • Yang Liu
  • Hui Zhang
  • Guangneng Dong

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Detail(s)

Original languageEnglish
Article number1789
Journal / PublicationMaterials
Volume14
Issue number7
Online published5 Apr 2021
Publication statusPublished - Apr 2021

Link(s)

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.

Research Area(s)

  • Pocket-textured surface, Starved lubrication, Tribology

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