Abstract
This article discusses the effects of various steels and lubricants on subsurface microstructural changes during a high-frequency dynamic pin-on-disc test under pure sliding and boundary lubrication conditions. Steel materials chosen for this study are 55SiMo8 steel, 100Cr6 steel, and 8 %Cr steel. Fully formulated polyalkylene glycols-based oil, synthetic hydrocarbon oil, and per-fluoro polyether base oil were selected as the lubricants. In 8 %Cr, the average roundness of large carbides was reduced by 33 % due to the deformation of carbides that occurred during severe cyclic loading. The outcomes showed that the material effect has a greater impact on the generation of white etching areas than the effect of lubricants under high-frequency dynamic loading.
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