The Effect Of Groove-textured Surface On The Tribological Interfacial Force And Wear Characteristics

Friction and wear occurs when two objects in relative motion contact,which acts as a critical factor to influence on the normal security service of equipments.It is benefited to improve the reliability of equipments,prolonging the service life and saving the energy and raw materials by effectively controlling the interfacial friction and wear.The interfacial friction and wear is influenced by many factors such as temperature,humidity,relative sliding velocity,surface roughness,normal force,wear debris and surface topography.The surface with textured treatment can effectively change the surface topography and induces the variation of contact states in the friction processing,which has a significant influence on the interfacial tribological properties.But how the textured surface influences on the interfacial tribological properties,meaning the study of influence mechanism is relatively small.Therefore,it is necessary to investigate how the interfacial tribological properties are influenced by textured surface in order to optimize the design of surfaces.In this work,the groove-textured surfaces and single groove surfaces with different groove width are manufactured on the disc specimen surfaces.In the ball-on-flat and flat-on-flat configurations,firstly,the influence of groove-textured surfaces on the interfacial tribological properties are studied,and then the influence of groove on interfacial tribological mechanic and dynamic properties are investigated by using the single groove surfaces,which reveals the influence mechanism of groove-textured surfaces on the interfacial tribological properties.The main conclusion can be shown as following:1?Under conditions of the experimental parameters and dimension parameters of the specimens,all the disc specimens with groove-textured treatment can significantly change the interfacial tribological properties no matter in the ball-on-flat or flat-on-flat configuration,and the groove-textured surface with special dimension parameters have a good potential in reducing the friction coefficient.2?The groove changes the interfacial contact states causing sudden variations in the normal displacement and force signals.In addition,the change in those signals becomes more apparent with increasing groove width.But there is a different influence of groove on the contact states in the different configurations.In the ball-on-flat configuration,the groove is able to interrupt the continue contact of the tribological interfaces,which accordingly caused the change of the normal displacement and force signals.In the flat-on-flat configuration,the groove mainly changes the interfacial contact area,which leads to the variation and redistribution of contact pressure,eventually making the force signals change.3?In the process of friction,the edge of groove plays an important role in cleaning the interfacial wear debris by scratching the tribological interfaces,which the negative influence of wear debris on the interface is decreased and then improves the interfacial tribological properties.But only the groove-textured surface with special groove width can effectively improve the interfacial tribological properties.In the ball-on-flat configuration,the scratching gradually evolves into a strong collision with increasing groove width,which is likely to increase interfacial wear.In the flat-on-flat configuration,with increasing groove width,the change of interfacial force signals is more significant and the scratching that the edge of groove acts on the interface is more strong,which is likely to increase the counterfacial wear.Therefore,only through reasonable designing the dimension parameters of groove can the groove-textured surface effectively improve the interfacial tribological properties.