Abstract

To explain the fact that the wear rate of a carbon steel subjected to ultrasonic vibration decreases with an increase in the amplitude of vibration, a simple equation for the wear rate was derived using the theories of adhesive wear and analytical results of vibration. Analytical predictions were in good agreement with experimental results. One of the main factors affecting the wear behaviour under vibration is the contact time between specimens during 1 cycle of vibration. The amount of oxygen adsorbed on rubbing surfaces with repeated dynamic contact loading also affects the wear rate. The activation energy of oxygen adsorption with vibration is considered to be lower than that found in the process of ordinary wear without vibration. The variation in hardness of worn surfaces due to repeated friction passes has little effect on the wear rate with vibration.

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