Abstract
The analysis of worn surface topography is an important approach to study the wear mechanism of friction pairs. The influence of mesh number of sand paper on simulated wear process was investigated based on fractal theory. The results indicate that cross-shear wear mode is appropriate for simulated wear, which is close to actual working condition and the resultant surface morphology has fractal characteristics. With the increase of the mesh number of sandpaper, the surface roughness Ra of stainless steel 0Cr18Ni9 and aluminum alloy 2A12 decreased while the fractal dimension D increased and showed a general linear relationship. However, the surface roughness Ra and fractal dimension D of the stainless steel were slightly greater than that of the aluminum alloy. Fractal dimension D may be related to the intrinsic physical properties of metallic materials and could be used to characterize the relative machinability of materials.
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