Investigation on mechanical properties of AA6351/SiC and AA6351/SiC/GR composites fabricated by stir casting method

Abstract

Metal matrix composites have many usages in the fields like materials and engineering sectors. In the current scenario castings were prepared by liquid metallurgy route and the mechanical properties of both metal matrix (AA6351/SiC) and Aluminum hybrid composite (AA6351/SiC/Graphite) were estimated. The castings were prepared with liquid metallurgy process through the reinforcement of 2-8 weight percent of SiC (AA6351/SiC) where as in hybrid composite reinforcement ranging with equal composition from 2 – 8% of SiC and Graphite. The reinforcing effect of SiC and Gr is studied where in the investigation went into the intensity of Density, Micro hardness and Tensile strength. The mechanical properties are found to increase at 6% SiC and with the combination of Graphite reinforcement in the AA6351 base matrix alloy. The SEM (scanning electron micrographs) images revealed that uniform distribution of particles without voids occur in castings and X-ray Diffraction Analysis (XRD) observes the phase formation of hybrid composite.