Physical and Mechanical Characteristics of Welded Joints Friction Stir Welding (FSW) AA 5083 with a Variation of Rotational Speed Probe

Abstract

Friction Stir Welding (FSW) is a welding process in which a new environmentally friendly has a good quality of welded joints. FSW also does not require filler metal. The process of FSW quite simply by utilizing the friction between the stationary workpiece by moving the workpiece. Friction second workpiece can generate local heat can soften the part. This is done in a state of solid state joining. FSW application usage is common in the aluminium alloy. Aluminium is often used in shipbuilding are AA 5083. In this study, analyzing the physical and mechanical properties of welded joints results with welding speed of 36 mm/min and a variety of probes rotational speed 1547 rpm, 1268 rpm, and 770 rpm, Standard testing using AWS B.4 2007. The results showed no indications of defects occur when tested of penetrant, either face or root. However, on a macro-etching test of defects found kissing bound and worm holes at 1268 rpm rotational speed variation and defects are found only worm holes in the variation of rotational speed 1547 rpm and 770 rpm. Values of tensile strength and buckling strength is best at 770 rpm rotational speed variation value (203.247 MPa or 20.725 kgf/mm2; 33%) and (30.1288 Kg / mm2; 49%).