Analysis of sliding wear mechanism in the contact between titled block and plate

The aim of this research is to provide an explanation of the sliding wear mechanism in the tilted contact between a block and flat surface through experiment and logical analysis. For this purpose, the authors first used a CCD microscope tribosystem, and conducted sliding wear experiments modeling the tilt of an S 45 C block test piece with various types of metal plates (aluminum alloy, S 45 C) with base oil lubrication. As a result, they were able to classify the wear modes under tilted contact as 'cutting,' 'ploughing,' and 'plastic deformation of the block tip.' The authors also conducted a logical analysis of the regions in which these wear modes occur, and constructed a wear map using the attack angle and hardness ratio of both materials on the two axes with the dimensionless interfacial shear strength which expresses the degree of lubrication state as a parameter. It was confirmed that the region of wear mode occurrence observed in experiments nearly conformed with the wear map.