Experimental Study And Optimization of Double Sided Friction Stir Welding of AA 6061 Plates
Keywords:
AA 6061; Conical tip; Friction stir welding; Tensile strength; Joint efficiencyAbstract
Friction stir welding (FSW) is relatively a new welding method where heat generated by friction is used to
forge components together under an axial force. In this method, the generated heat does not exceed the material melting
point, instead the material is heated to its forging temperature and is stirred together by a rotating tool. Since the
invention of FSW, this technique has been mainly used for welding aluminium plates together for butt and lap joint
configurations. In this work, double sided friction stir welding was performed on AA 6061 plates of 12 mm thickness at
rotational speeds (1000, 1400, 2000 rpm), weld speed (20, 28, 40 mm/min) with the conical tip tool. Tensile strength
analysis has been carried out on nine sets and process parameters are optimized by using TOPSIS method. The most
suitable set of parameters is found at tool rotational speed (TRS) of 1000 rpm and weld speed (WS) of 40 mm/min.