Effect of Current Behavior on Acoustic Emission Wave during Microsecond Discharge

Abstract

In this study, we investigate the effect of discharge current on the occurrence of burst AE wave caused by microsecond discharge. Electrical discharge duration was changed from about 1μs to 8μs by using condenser circuit. Effect of discharge current behavior was estimated by comparing with experimental signal and simulation one. AE wave was detected by optical fiber vibration sensor. The optical fiber vibration sensor was located on an aluminum work-piece (cathode) plate. Simulation was carried out with MSC. Marc. As the results, it was found that a force depending on discharge current behavior occurred AE wave. The force direction was machining direction. The force has been occurred during microsecond discharge.