Friction Stir Welding of Aluminum 6082 2018-28-0051
Friction Stir Welding (FSW) overcomes many of the problems associated with traditional joining techniques. F SW is a solid-state process which produces welds of high quality in difficult-to-weld materials such as aluminum and is fast becoming the process of choice for manufacturing lightweight transport structures such as boats, trains and aero planes. A rotating cylindrical tool with a profiled probe is fed in to a butt joint between two clamped workpieces, until the shoulder, which has a larger diameter than the pin, touches the surface of the workpieces. The probe is slightly shorter than the weld depth required, with the tool shoulder riding at the top of the work surface. In this dissertation two Aluminum 6082 plates were joined with friction stir welding technique. The primary objective of this work is to study the effect of root gap and variation in tool speed on the properties of base metal i.e. AL6082. AL6082 base plates were friction stir welded with a root gaps of 0.25 mm, 0.5 mm and 0.75 mm at variable tool speeds of 1400 rpm and 1800 rpm. The analysis was carried out for different parameters such as Microstructure variation, Hardness and tensile strength by using Universal testing machine as per ASTM standards.