Magnetization of Friction Surfaces and Wear Particles under Tribological Processes

Abstract

The relationship between the magnetization of friction surface and wear phenomena is discussed for nickel. The experiments are performed by the sliding friction test of a pin-on-block type. The magnetization of friction surface is estimated by measuring changes in the magnetic flux density of the friction surface. Influences of lubrication and normal loads on the changes in magnetic flux density are examined. The experimental results indicate that the surface damage by the transfer (adhesion) related to the magnetization of frictional surface. We find out that the wear particles are magnetized in one direction by tribological actions. The aggregation of wear particles is also magnetized in one direction. Therefore, wear particles and transfer particles on the friction surface are principal cause of the magnetization on the friction surface.