Study on damage evaluation of bimetal materials using lead-free copper alloy with AE method

(Influence by difference in composition)

Abstract

The lead bronze is widely used as the sliding materials. However, the development of lead free copper alloy has been advanced, because the use restriction of lead is carried out. In this study, the application of AE method was examined for evaluating the characteristics of the bimetal materials of lead free copper alloy which changed the distribution of the hydrosulphide in which the slide characteristics are improved by the addition of sulfur. As the results, it was possible to show the possibility for evaluating the damage conditions by using the frequency analysis, m value and Ib value of the AE signals detected in tensile and fatigue test.