Investigation of the Effect of Mixing Direction on the Quality of Friction Stir Welding

Abstract

Friction stir welding has become more popular compared to traditional welding methods because it allows for the joining of different types of materials in solid form without the need for additional material. With well-optimized welding parameters, it becomes easy and economical to create joints with an excellent microstructure and superior mechanical properties. Welding parameters depend on factors such as the geometry of the pin tool, rotation direction, rotation speed, feed rate, and vertical application force. In this study, the effect of pin rotation direction on weld quality was investigated based on previous research. The rotation direction and tool geometry of the mixing tool are of primary importance in achieving homogeneous mixing of well-plasticized materials and consistent material flow. In welds created using this method, it is expected that the material will mix homogeneously in the junction area and fill the entire region equally. It was concluded that the direction of the stirring tool rotation is one of the key parameters that significantly influences the formation of weld microstructure and mechanical properties.