DefinePK

Abstract

In modern structural concept demand reduction of both weight as well cost of production and fabrication of materials. Aluminum alloys has gathered wide acceptance in the fabrication of light weight structures requiring a high strength to weight ratio. Friction stir welding is at present widely used for the welding aluminum alloys. In this work defect free joints of AA6063-T6 and AA7075-T651 alloy plates of 6.35mm of thickness were butt jointed using friction stir welding. The quality of the joints are influenced by process parameters such as tool rotational speed, axial force and feed rate. The effect of these parameters on tensile strength, impact strength and microhardness of the joints were discussed. The results showed that the tool rotational speed has significant influence of tensile strength. Welding speed and tool profile dominated the impact strength. Microhardness value were found at the in around of the weld zone.