Study on Friction and Wear Utilizing Acoustic Emission

Wear Mode and AE Spectrum of Copper

Abstract

It is well known that acoustic emission (AE) is the emission of elastic stress waves resulting from the deformation and fracture of materials. This paper describes the characteristics of AE signals which generated by friction and wear phenomena. The experiments carried out changed the finishing method of plate specimens for produce a typical wear mode. In addition, tensile tests carried out for study of the AE signal. The main results of experiments are summarized as follows : (1) In the friction and wear experiments, AE frequency range is very wide (0.02 to 1.5 MHz). (2) In the friction without wear, AE waves are only low frequency spectrum of below 500 kHz. (3) AE waves resulting from wear are characterized by the high frequency spectrum range (0.5 to 1.5MHz).