Investigation of wear behaviour of Al +Cu powder perform

Abstract

This study deals with the investigation on the effect of Cu addition in Aluminium powder performs on their dry sliding behaviour against a hardened steel disc of EN-32 with hardness of 55 HRC. The Copper powder has been added in 5 different wt. Percentages of 10%, 155, 20%, 25%, & the eutectic composition of Al+ CU that is 33%. The investigation has been carried out by dry sliding experimentation on Pin on disc machine in ambient conditions. The powder performs were manufactured by CIP technique on a 40 ton UTM. The compacting pressures were 16KN, 18KN, & 20KN. the sintering temperatures were 450⁰C and 475⁰C. The applied loads during the experimentation were varied from 10 N TO 15 N AND 20 N. The track radii were 25 and 40mm and the RPM of the disc was kept constant at 1000 rpm. It has been observed that in low stress dry sliding conditions the instantaneous wear rate is function of Cu content for Al+ Cu powder performs. The addition of Cu has resulted in better wear resistance of the performs. The friction coefficient was also observed to be increasing with the increasing Cu content. The wear during the experimentation was purely adhesive at lower values of applied load and track radius. Whereas the wear rate was found to be changing its regime form mild to little severe one for higher applied loads and for longer duration of time of rubbing. This investigative experimentation may prove useful for the young and bidding technocrats to study the otherwise cryptic wear mechanism.