Mechanical Behavior of Silicon Carbide Reinforced Friction Stir Welded Joint of Aluminium Alloy 6061

Abstract

In this work the Mechanical behavior of reinforced welded butt joints of AA6061 aluminium alloy fabricated by friction stir welding process has been investigated. 10%, 15%, 25%, 30% volume fractions of Silicon carbide (SiC) particulates of 400 mesh were added at weld interface. This work was focused to study the effect of Sic as reinforcing material along with different volume proportions on the mechanical properties of friction stir welded joint of AA6061.The experimental results indicated that the reinforcing material and percentage of reinforcing material has a major effect on the mechanical properties of welded joint. The results of reinforced friction stir welded joints were correlated with parent material and without reinforced friction stir welded joint. The best results have been obtained at 25% volume fraction of silicon carbide particulates at weld interface. But at the same time percentage of elongation decreases and the behavior of material changes from ductile to brittle.