The Effect of Surface Texturing on Dry Gross Fretting

Agnieszka Lenart,Andrzej Dzierwa,Pawel Pawlus,Slawomir Wos

doi:10.3390/lubricants6040092

Agnieszka Lenart, Andrzej Dzierwa + Show 2 more

Open Access

https://doi.org/10.3390/lubricants6040092

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Journal: Lubricants	Publication Date: Oct 16, 2018
Citations: 5	License type: CC BY 4.0

Affiliation: Rzeszów University of Technology

Abstract

The effect of steel disc surface texturing on dry gross fretting in a ball-on-disc configuration was studied. Dimples were created with abrasive jet machining. The tribological performance of sliding pairs, steel–steel and steel–ceramics, was experimentally studied. The character of surface texturing effect was related to the dominant wear type. During steel–steel contact, the presence of dimples on disc surfaces could lead to increases in wear and friction. However, the escape of wear debris into dimples could result in reductions of friction and wear in the steel–ceramics configuration.

Highlights

Surface texturing is an option of surface engineering resulting in significant improvements in tribological properties of mechanical components
Well-designed surface texturing leads to friction reduction under lubricated contact [1,2,3] because oil pockets act like lubricant reservoirs or they can create additional hydrodynamic lift
The scatter of the coefficient of friction was smaller than 0.02; the scatter of wear was typically smaller than 10%

Summary

Introduction

Surface texturing is an option of surface engineering resulting in significant improvements in tribological properties of mechanical components. Well-designed surface texturing leads to friction reduction under lubricated contact [1,2,3] because oil pockets act like lubricant reservoirs or they can create additional hydrodynamic lift. Effects of surface texturing in a dry-friction regime were analysed rarely, typically for studying its effectiveness in dry machining. Dimples typically act as traps for wear debris, reducing wear. This effect exists in the mixed-friction regime [4]. Conradi et al [5] found that steel specimens with small line density contacted with ceramic counter specimens under disc-on-ball configuration led to a low friction resistance in dry sliding conditions

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