Influence of Wear Particles and Reverse Transfer of the Material on Wear Intensity of Aluminum Alloy under Dry Friction on Steel

Sintered Al-40Sn samples were subjected to tribological tests by the "pin-on-disk" scheme without liquid lubrication. A steel disk was pressed to the upper and lower face surfaces of a vertically located sample. It is revealed that the location of counterbodies relative to the frictional contact plane can significantly influence their wear intensity. These differences are explained by the different composition and structure of friction surfaces of counterbodies the nature of formation of which depends on the gravity vector direction defining the features of displacement of wear particles over the friction surface.