ABSTRACT
This chapter selects a case study between AA 5083– 6063. Studies that are focused on investigation of defect formation may provide solution, which may prevent imperfections in most dissimilar joint. In line with this, a case study is presented here that analyzes defects that may typically be introduced during Friction Stir Welding (FSW) of dissimilar aluminum alloys AA5083 and AA6063. AA5083 finds large-scale application in fabrication of ship hulls owing to its good corrosion resistance to seawater and AA6063 is widely used in making internal structure of ship as well as in automobiles because of its properties such as good workability, good corrosion resistance, light weight, and moderate strength. A common defect associated with FSW is tunneling defect, which is also referred to as wormhole defects owing to its similarity with a wormhole. Defects and their effects can be characterized and analyzed through a comprehensive regime of mechanical testing and micro-structural analysis.
