Study on the Influence of Graphite on Mechanical Properties of Al6061-hBN-Gr Hybrid MMC’s

Abstract

This paper deals with the fabrication and mechanical investigation of Aluminium 6061, hexa Boron Nitride (hBN), and Graphite (Gr) hybrid metal matrix composites. Al6061 is the matrix metal having properties like good toughness, excellent corrosion resistance, good weldability and brazability. Boron nitride has excellent thermal and chemical stability and also high hardness. Graphite is a self-lubricating reinforcement that enhances the antifriction properties. Here, the fabrication is done by stir casting which involves mixing of the required quantities of reinforcements into stirred molten Al6061. After solidification, the specimens are prepared as per ASTM standards to determine various mechanical properties like tensile, density and hardness. The microstructure of the composite is observed by optical microscope (OM). Keywords: Aluminium 6061, hexa Boron Nitride, Graphite, Stir casting, Mechanical properties.