EFFECT OF SEVERE PLASTIC DEFORMATION ON MECHANICAL PROPERTIES OF AL6061 / SIC METAL MATRIX COMPOSITES

Siddesha.H.S, Shantharaja.M

Abstract: The severe plastic deformation process is capable of developing the submicron grain structures in metallic alloys and to improve the mechanical properties. Al6061/SiC composites become one of the most widely used composite materials in the engineering applications. Their light weight, low cost and considerable strength have favored their use in automotive and aerospace industries. In this paper the evaluation of Micro hardness, Ultimate Tensile Strength and ductile properties of severely plastic deformed specimens are discussed. This article describes repetitive corrugation and straightening processes with Cyclic Constrained Groove Pressing parameters such as Wt. % of Sic, strain rate, Number of passes, Thickness of the specimen and heat treatment process. The results indicated that the percentage of Sic factor has a major influence on the hardness of the composite plate, followed by no. of passes, Heat treatment, plate thickness and strain rate. The optimal conditions for tensile strength are Wt.% of Sic of 15%, strain rate of 1.5mm/min, Number of passes of 7, specimen thickness of 4mm and heat treatment of 3hrs.Experimental results indicate that number of passes and Wt.% of Sic are most influencing parameters and other parameters are less significant

Keywords: Severe plastic deformation, CCGP, Al/SiC composites, Micro hardness, UTS, Ductility

DOI: https://doi.org/10.15623/ijret.2015.0420005