The Mechanism Of The Influence Of Bionic Non-smooth Morphology On Friction And Wear

On the basis of previous research, biomimetic coupling unit body processed by laser melting can obviously increase the wear-resisting performance of the materials, But the mechanism how does it works has not been revealed. Therefore, in order to explore the reasons that why it strengthens the wear-resisting performance, series biomimetic non-smoothed surface specimens with different shapes and different area ratios were prepared by laser processing. Tests were conducted on MMU-5G wear and abrasion test machine for 50 minutes. The research finds that the wear mechanism is micro cutting, and the differences between the shapes and the area ratios leads to different mass changes. The extent of the increase of sample mass after wearing declines when the sample shapes changes from the striation to the grid, convex and cyclic samples. Among the shapes, the cyclic sample is the only shape causing mass loss. As for the counter pairs matching with the non-smoothed samples, the mass loss declines greatly and is quite greater than the ones matching with the smooth specimens. Comparing with the other non-smoothed units, the striation causes the greatest mass loss, which almost doubles the damage of the grid ones. Taking the different area ratio samples into consideration, it is easier to find that the wear mass of both the sample pairs and the counter pairs lies between the defferent shape friction pairs. But when arranging the wear mass in order, some certain shapes show the consistency in the role it plays both in the sample pairs and in the counter pairs, while some are quite different.