Modeling and optimization of process parameters for friction stir welding of dissimilar aerospace alloys AA2014 and AA7075

Aluminum alloys possess a high strength-to-weight ratio and good corrosion resistance making them suitable for various structural parts components used in the aerospace industry. However, principal barrier restricting their use is weldability. This experimental study addresses issues joining of dissimilar aluminum alloys. In this work, friction stir welding (FSW) strength AA2014 AA7075 has been carried out effect parameters studied to obtain defect-free welds. Detailed statistical analysis was performed regression models were developed prediction optimization. Multi-objective optimization by employing desirability function determine optimal condition welds with adequate mechanical properties. Microstructure fracture surface optimum weld also compared lowest highest heat input welded joints.