The effect of alumina on mechanical behavior of Al 6064 alloy

Abstract

Need in the development of new materials with excellent properties are growing day by day. Composite materials are the simple and better way to accomplish materials with superior properties. Aluminium metal matrix composites due to their high strength to weight ratio, low cost, improved electrical conductivity and good tribological properties are broadly produced and used in various engineering applications in the area of automobile, aerospace and military engineering. In the present paper an attempt has been made to fabricate MMC of an alloy of aluminium 6064, reinforced with alumina particles through stir casting with vortex technique. Three aluminium alloy composites with alumina (2.5-5-7.5 wt. %) were fabricated. Different mechanical tests for hardness, tensile strength and toughness were carried out for the samples. Addition of alumina to aluminium alloy shows an increase in mechanical properties of aluminium metal matrix composite. The results showed that the stir casting could produce uniformly distributed reinforced particles of Al2O3 in Al 6064 alloy.

Role of homogeneous distribution of SiC reinforcement on the characteristics of stir casted Al–SiC composites

“…It was observed that the stirring time and processing temperature have significant effects on the mechanical properties (elastic modulus and harness) and microstructure of the composites. Kumar et al [19] analysed the mechanical behaviour of the metal matrix composites by changing the composition of the reinforcements. They observed that the 7.5wt% Al2O3 shows enhanced mechanical properties such as hardness, tensile strength and toughness and also uniform distribution of the reinforcement particles.…”

Experimental Investigation of In-homogeneity in Particle Distribution During the Processing of Metal Matrix Composites

“…Finding or detecting the flow pattern of the SiC particles was not feasible because of the elevated processing temperature in the stir casting process. [17]. Streak photography is the visualization experiment to trace a particle which helps to find out the flow pattern of the reinforced particles and the presence of clustering region of the fluid.…”