Abstract
The phenomenon of fretting wear has been a particular case of wear, which is caused by the slight relative slip motion that occurs between surfaces of vibrating metal members. The severe loss of dimentional accuracy, and subsequent failure in structural components provided the impetus for a very considerable research effort culminating in a number of highly technical research reports. Since fretting is a type of wear, it should be mitigated by proper lubricants, but the investigations in oil are relatively few. The purpose of this report was to experimentally determine the effect of the amplitude of relative slip on fretting wear damage with line contact both in oil and in air. The discharging of wear debris is thought to have an intermediate property with line contact compared with point and area contacts. When the specimens were completely surrounded by oil, oxide debris, generally generated with fretting wear in air, did not form. Thus the effectiveness of oil is the prevention of severe fretting oxidation by the limitation in the supply of oxygen. The magnitudes of the wear damages, frictional forces, adhesive forces and electrical contact resistances were strongly dependent upon the amplitude of relative slip and the surface roughness of specimens. This tendency was especially marked in air.
