Friction stir welding of dissimilar aluminum alloys AA7075 to AA2014

The joining of dissimilar Al-Cu alloy AA2014-T651 and Al-Zn alloy AA7075-T651 plates was carried out using friction stir welding (FSW) technique and the process parameters were optimized using Taguchi L9 orthogonal design of experiments. The rotational speed, transverse speed, and axial load were the parameters taken into consideration. The optimum process parameters were determined with reference to tensile strength of the joint. The predicted optimal value of tensile strength was confirmed by conducting the confirmation run using optimum parameters. This study shows that defect free, high efficiency welded joints can be produced using a wide range of process parameters and recommends parameters for producing best joint tensile properties. Analysis of variance showed that the axial load is the most dominant factor in deciding the joint soundness while rotational speed and welding speed also played significant roles

Alloy · Aluminium · Composite material · Friction stir welding · Joint (building · Metallurgy · Orthogonal array · Process (computing · Process variable · Rotational speed · Structural engineering · Taguchi methods · Ultimate tensile strength · Welding · Advanced Welding Techniques Analysis · Aluminum Alloy Microstructure Properties · Aluminum Alloys Composites Properties · Computer Science · Engineering · Materials Science · Mechanical Engineering