Laser Welding of Al–Ca–Mg Alloy Sheets

Abstract—The mechanical properties of the laser welded joints of Al–Ca–Mg sheets alloyed with zirconium and scandium are investigated. The tensile strength of the joints is 0.70–0.72 of the strength of the base metal for defect-free welds. Fracture occurs in the fusion zone during tensile testing. However, when weld defects such as porosity are present, the tensile strength drops to 0.54–0.59 of the strength of the base metal, and fracture occurs within the weld metal.