A Review on an Investigation on the Effect of Immersed Medium in Friction Stir Welding of Aluminium Alloys (AA 6061-T6)

Abstract

Friction stir welding is solid state welding technology used for welding of low melting point metals such as Al, Mg and its alloys. FSW process can be controlled by different parameters like rotational speed, feed rate and welding medium. In this process, a cylindrical non-consumable tool, with a profiled probe (pin) rotating about its own axis is slowly plunged into the abutting edges of work pieces rigidly clamped to a backing plate. When the shoulder of the tool touches work piece surface, the tool is translated (with an axial force) along the length of the joint forming the joint in the solid state. In this research, friction stir welding parameters and its effect on aluminium alloy AA 6061-T6 is investigated. Aluminium 6061 alloy is commonly used for construction of aircraft structures. In experimental part, the effect of different welding parameters on thermal histories, tensile properties and micro structural properties are studied. Friction stir welding consumes less energy. It provides improved mechanical properties. This paper gives review of basic concepts of friction stir welding.