Experimental Investigation of Wear Behaviour of AA6061 Hybrid Metal Matrix Composites

Abstract

— In the present investigation the hybrid composite was prepared by stir casting method. The AA6061 is used as matrix material and Al2O3, B4C and SiC are used as reinforcement particle for preparation of hybrid metal matrix composites. The weight percentage of Al2O3 is varied B4C and SiC kept at constant weight percentage. Wear test was done on a Pin on Disc apparatus at varying load of 9.81 N, 19.62 N, 29.43 N and 39.24 N under dry sliding conditions. The variation of coefficient of friction (COF) during the wear process was recorded by using a computer. The Microstructural study was done by using Scanning Electron Microscope (SEM), which revealed the uniform distribution of Al2O3 and B4C and SiC in matrix alloy. The wear results revealed that the volumetric wear loss was increased with increase in normal load. The results also indicated that the volumetric wear loss of the Al6061-3wt.%Al2O3-5wt.%B4C-5wt.%SiC composites were less compared to other compositions.