Study of the Possibility to Weld AA1100 Aluminum Alloy by Applied Friction Stir Spot Welding
Friction stir welding is a modern and an environmentally friendly solid state joining process used to joint relatively lighter family of materials. Recently, friction stir spot welding has been used instead of resistance spot welding which has been received considerable attention from the automotive industry. It is environmental friendly process that eliminated heat and pollution. In this research, friction stir spot welding has been used to study the possibility to weld AA1100 aluminum alloy sheet with thickness of 3 mm by using lap joint. The process was done by using a drilling machine instead of milling machine. Different tool rotational speed of 760, 1065, 1445, and 2000 RPM has been applied with manual and automatic compression to study their effect on the quality of welded joints. Heat generation, pressure applied, and depth of tool penetration have been measured during the welding process. The result shows there is a possibility to weld AA1100 sheets; however, there is some surface defect that happened due to insufficient condition of welding. Moreover, the relationship between rotational speed, pressure, heat generation and tool depth penetration was founded.