Mechanical Properties Evaluation in Friction Stir Welding of Different Pipes

The friction stir welding is used for joining non-ferrous and ferrous materials whether tube-shaped sections or flat plates in several manufacturing applications like aerospace applications, transport land applications, and shipbuilding applications. This study is focused on friction stir welding joining for similar and dissimilar pipes as (AISI 316 Austenitic Stainless steel with API 5L carbon steels, 6063 aluminum alloy with API 5L carbon steels, 6063 aluminum alloy with C36000, 6063 aluminum alloy with C12200, 6063 aluminum alloy with 6082 aluminum alloy, AL 6063 alloy with AL 7022 alloy, 7022 aluminum alloy with C12200, 7022 aluminum alloy with C36000 and C36000 with C12200). The study was conduct for these joints to evaluate the mechanical properties by tensile test, visual inspection, and Microhardness test. In friction stir welding of these alloy systems, six welding parameters were used, rotation speed of (775, 1000, 1300 and 1525 rpm), welding speed of 1.7mm/min, axial force of 8.5KN, with a clockwise direction of rotation, and zero degree of tilt angle, using a tool with a threaded cone geometry pin. The results show that for (AL6063 with AL6082 weld joint cases the best case was case 19, AL6063 with AL7022 weld joint cases showed that the best case was case 21 and C36000 high-leaded brass with C12200 copper alloy showed that the best case was case 36).