Strength performance of micro alumina reinforced direct recycled aa6061 chips based matrix composite

Abstract

Ultimate tensile strength (UTS) becomes a primary concern in direct recycling of metal chips. This study investigates the influences of preheating temperature, preheating time and volume fraction of alumina on the tensile strength performance of aluminium alloy. The parameters of temperature, time and volume fraction of micro alumina were varied between 450-550o C, 1-3 hours and 5-15% respectively. The full factorial design with center point analysis was employed to analyse the effect of process variables on the response. A total of 19 experimental runs were performed through the hot extrusion operation. The preheating temperature and volume fraction were identified as the key variables affecting the UTS. An optimum UTS was obtained for the profile extruded at 550o C, 3 hours duration and 5% volume fraction of alumina. © 2019 Trans Tech Publications Ltd, Switzerland.