Mechanical behaviour of ASTM A890 GR6A super duplex stainless steel repaired by friction taper stud welding (FTSW)

This paper presents results of friction-taper stud welding applied to super duplex ASTM A890 Gr.6A stainless steel. The input variables were the speed of rotation; the plunge depth and the downward force and they were tested with a specific geometry in a friction welding machine. These variables were applied by the Taguchi method. After the friction welding, the joints were inspected and was not found lacking of filling. The results of both bending test and tensile test were satisfactory. The temperatures of the process were recorded at three different points on the block welding and presented similar characteristic behaviours. The parameter window applied to this work proved to be suitable for welding of stainless steel super duplex ASTM A890 Gr6A.