Título

THE INFLUENCE OF TOPOGRAPHY ON THE SPECIFIC DISSIPATED FRICTION POWER IN ULTRA-MILD SLIDING WEAR: EXPERIMENT AND SIMULATION

Autoria

Daniel Stickel; Alfons Fischer

DOI

10.5151/1472-5836-25775

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Resumo

Current political, economic and ecological guidelines demand the increase of power densities of nearly all machinery parts today. In order to further lower the wear rate towards the ultra-mild sliding wear regime an integral approach is needed, which has to regard contact conditions, surface topography, surface chemistry, as well as sub-surface properties. Still there are no simple parameters to classify the performance of tribosystem. In this study the area and volume affected by tribocontacts are calculated by means of a three dimensional elastic-ideal plastic contact model. The surfaces are generated by means of conventional machining procedures and characterized by scanning white light interferometry. The further input data as to normal and friction forces are derived by ultra-mild sliding wear tests under boundary lubrication conditions of carburized steel against carburized steel and 52100 steel against case-hardened spheroidal cast iron. This contribution will depict the distinct influence of the topography on friction and ultra-mild sliding wear of common Fe-base materials and point on the marked importance of highly localized effects, which govern the acting mechanisms.

 

Palavras-chave

Ultra-mild sliding wear tests; Carburized steel; Case-hardened spheroidal cast iron; Experiment and simulation