Explanation

Wear caused by relative vibration with small amplitude between two surfaces. Usually occurs on closely fitting journals; The joint between the turbine and compressor blades: the joint surface of bolts, rivets, and other connecting parts affected by vibration; Rope and rope pulley; Pistons and other parts in hydraulic devices. If there is lubricating oil between the friction pairs, a reddish brown colloidal substance will flow out. The two friction surfaces are closely matched and the wear debris is not easy to be discharged. These wear debris 1 often plays the role of abrasive, accelerating the fretting process, and this cycle continues, eventually leading to the damage of the part surface. The failure modes caused by fretting are mainly scratches, metal adhesion, pits (or pits), local wear stripes (or grooves) and surface microcracks. The main factors affecting fretting are the composition of materials, microstructure and properties, applied load size and cycle times, vibration frequency and amplitude, temperature, atmosphere, lubrication and environmental conditions.

Classification