Experimental investigations on the effect of micropitting on friction – Part 1.

Experiments were performed to investigate the effect of micropitting on friction coefficient. Two twin-disc machines were used: one to develop micropitting on a disc pair, the other one to measure the friction coefficient. Fatigue was endured on one disc pair; another was used as a reference to dissociate the impact of micropitting from other factors. The study shows that friction coefficient was impacted by the development of micropitting. It also underlines a clear correlation between micropitting magnitude and friction coefficient. The influence on friction of classical parameters, such as roughness and oil, was also discussed in order to validate that only micropitting growth influenced friction measurements. • The impact of micropitting on the friction coefficient of two lubricated surfaces is investigated. • Two twin disc machines are used: one to generate micropitting, one to measure friction coefficient. • A correlation between micropitting magnitude and friction coefficient increase is underlined. [ABSTRACT FROM AUTHOR]