Identification of Tribological Phenomena under Electric Current Using AE Sensing

Feature of AE Signal Detected at Sliding Wear under Electric Current in Rainy Weather

Abstract

Wear under electric current causes more damage than normal friction due to the effects of arc discharge and melting. In this study, the characteristics of AE signal waveforms during wear under current application are extracted from the amplitude and the frequency spectrum, and the phenomena occurring in rainy weather (water lubrication) are analyzed. As a result, it was found that the state of arc discharge and melting can be evaluated from the change of AE signals even in the presence of water. In this report, the results of an investigation of the energized wear mechanism based on the characteristics of the AE signals are described.