Investigation of the effects of skewness Rsk and kurtosis Rku on tribological behavior in a pin-on-disc test of surfaces machined by conventional milling and turning processes

Friction and wear are influenced by the surface conditions of the material, since there is deformation, segregation, generation of oxide films, among others. Roughness is an important characteristic in tribological studies, where the parameters of skewness and kurtosis have greater influence than the conventional parameters Ra and Rq. This study is aimed to investigate the influence of the parameters of skewness Rsk and Rku kurtosis on the surface of the USI AR 360 steel machining by the milling and turning processes in the pin-on-disc sliding wear test. Results showed that surfaces with the same R and R could be distinguished by the skewness parameter. Different behaviors were observed in a q the analysis of friction curves, where the skewness effect showed a tendency to reduce the friction coefficient. It was also observed that the feed marks orientation in relation to the sliding direction can influence the tribological behavior of the surfaces. Superscript/Subscript Available

Automated summary

Friction and wear are influenced by material surface conditions, including deformation, segregation, and oxide film generation. Roughness is an important factor in tribological studies, with skewness and kurtosis parameters having more influence than conventional parameters. This study investigates the impact of skewness and kurtosis parameters on the surface of steel, showing different behaviors in friction curves and the influence of feed marks orientation.