FRICTION STIR WELDING OF ALUMINUM-MAGNISIUM ALLOYS

Abstract

The low density and high strength to weight ratio, magnesium is widely used in transport industries, and it is a lightest structural alloy. In addition, magnesium alloys ensure good castability, sound damping, and protection against electromagnetic damage, good machinability and recyclability. However, to improve the application of magnesium alloys, more effective welding and joining techniques are required. Because of such problems as breaking, expulsion and vacuum output in the solder region, magnetic assignments with conventional welding processes are very difficult to integrate. The adverse effects of fusion soldering include (a) a dynamic heat and intense deformation stress; (b) porosity and fusion area cracking; Alloys with magnesium Tungsten Gas Arc Welding (GTAW) has produced some flaws that impair its mechanical properties, including porosity and heat cracking. Without melting magnetic steel, friction stir welding (FSW) may be fused to prevent issues with solidification. The emerging FSW joint technology offers enormous potentials for magnesium alloys, as they significantly reduce the amount of soldering defectors, such as porosity, cracks and distortions, characteristic of fusion-sudden joints. This study tested the effect of AZ 61A magnesium alloy jointing by friction-stir welding procedure (IV) parameter on mechanical and metallurgical properties, and compared the results with AZ61A magnesium alloy joints that pulsate Current Gas Tungsten Arc Welded (PCGTAW). The extruded AZ61A plate is machined in accordance with the necessary measurements (300 mm x 150 mm x 6 mm). For the square assembly, FSW and PCGTAW connections were ready. According to the suavity of the tensile specimens, the strength, tensile strength and elongation of the transverse region were quantified. Tensile specimens have also been developed to determine the tensile strength and tensile strength ratio. A microstructural inspection optical microscope was used (OM). The precipitated phases of the soldered joints were measured by X-ray diffraction (XRD). The electron scanning microscope investigated the fractured surfaces of the tensile specimens (SEM).