What is friction stir welding used for?

Friction stir welding is a solid state welding technique that does not reach the melting point. Known for its ability to weld difficult to weld materials, FSW is mainly used for the high quality joining of aluminium and copper parts. The process is also suitable for joining dissimilar parts made of aluminium and steel, for example.
FSW replaces the traditional fusion welding techniques due to the excellent repeatability of the process and the low deformation of the material. This technique has many applications in the industry. FSW is used, for example, for the production of cold plates, aluminium tanks in various fields such as railways, aeronautics and space.