MICROSTRUCTURE AND MATERIAL FLOW INVESTIGATION OF DISSIMILAR FRICTION STIR WELDED PLATES

The Friction Stir Welding (FSW) was first invented on December 1991 by Wayne Thomas in The Welding Institute (TWI), Cambridge, United Kingdom. Friction Stir Welding has been initially developed for welding aluminium alloys, but several recent studies show that it should be also successfully applied to other materials, such as metal-matrix composites. The concept of the FSW is that a non-consumable rotating tool with a specific designed pin and shoulder is inserted between the edges of metal plates to be joined. Then the welding tool will be stirred traversely along the line of joint. The tool which acted as a heating of workpiece and movement of material to produce the joint will produced the plastic deformation of workpiece