Compound Processing of Deformation and Joining Using Friction Stir

Abstract

The new compound processing is proposed, which can join the interface between the layered metal materials giving the plastic deformation to the joined region. Plastic deformation and the solid-phase joining are simultaneously done by the frictional stir action, which generates the pressure, frictional heat and plastic flow. As the similar materials, aluminum thin metal material is used and ass the dissimilar materials, aluminum material and stainless steel are used the rotating tool for friction-stir action is pressed down onto the upper thin plate, which is layered on the lower thin plate. The generated friction heat and plasticity flow make it possible to join each other the interface of the upper material and the lower material, which are deformed around the joined region. The temperature rises are measured at the bottom surface of the layered lower material under the conditions of the different keeping times and various indentation depths of the tool. It is shown that joining and non-joining conditions with the plastic deformation are deeply affected by the temperature distribution. The proposed processing can join the interface in the solid-state with the performance giving plastic deformation.