The Effect of Disc Surface Topography on the Dry Gross Fretting Wear of an Equal-Hardness Steel Pair

Agnieszka Lenart; Pawel Pawlus; Andrzej Dzierwa

doi:10.3390/ma12193250

The Effect of Disc Surface Topography on the Dry Gross Fretting Wear of an Equal-Hardness Steel Pair

Materials (Basel). 2019 Oct 4;12(19):3250. doi: 10.3390/ma12193250.

Authors

Agnieszka Lenart¹, Pawel Pawlus², Andrzej Dzierwa³

Affiliations

¹ EME Aero, Jasionka 954, 36-002 Jasionka, Poland.
² Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Powstancow Warszawy 8 Street, 35-959 Rzeszow, Poland. ppawlus@prz.edu.pl.
³ Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, Powstancow Warszawy 8 Street, 35-959 Rzeszow, Poland.

Abstract

Experimental investigations were carried out with an Optimol SRV5 tribological tester in a flat-on-sphere scheme. The balls co-acted with the discs in a gross sliding fretting regime. The balls and discs were made from the same steel with a very similar hardness. Tests were conducted at 25-35% relative humidity, 30 °C, and a constant normal load and number of cycles (18,000). The discs had different textures after various machining treatments. It was found that the total wear level of the tribological assembly was proportional to the disc surface amplitude. The influence of the disc roughness on the coefficient of friction was evident only for the smallest stroke of 0.1 mm, and the frequency of oscillation affected this dependency.

Keywords: coefficient of friction; fretting; surface topography; wear.