Investigating the effect of welding parameters on the mechanical properties of aluminum ۵۰۵۲ and pure copper weldment joined by friction stir welding

In this research, an attempt has been made to weld ۲ mm thick ۵۰۵۲ aluminum sheet and pure copper sheet using the friction stir welding method with a butt joint design.The changes in the microstructure and mechanical properties of the joint at different forwarding speeds of ۲۷ mm/min, ۳۲ mm/min, and ۴۱ mm/min were investigated at the rotation speed constant of ۷۰۰ rpm. The results of the uniaxial tensile test and optical microscope imaging showed that with increasing the forwarding speed, the ultimate tensile strength of the joint increased, and the microstructure of the copper side became finer. Therefore, the highest ultimate tensile strength at a forwarding speed of ۴۱ mm/min was obtained which reached ۱۵۱ MPa. Moreover, the microhardness results depicted that with increasing the forwarding speed, the hardness of the weld zone increases, and this reached ۹۶ H when the forwarding speed is ۴۱ mm/min.

کلیدواژه ها:

friction stir welding ، welding aluminum to copper ، Examination of the microstructure ، ultimate tensile strength