Abstract
Friction Stir Welding (FSW) is the most remarkable welding technology that has been invented and developed in last decade. It made it possible to join a number of light metals that were previously believed difficult to weld in a reliable manner, i.e. without defects including distortion. This summarising report tries to clarify the recent trend of this new technology in Japan. It reveals that the Japanese industry has a strong development potential, particularly in the field of practical applications. Examples of practical products are the rolling stock industry, automobile industry, shipbuilding and aircraft.. Major research works are concentrated on the clarification of the mechanical properties for the particular products. General agreements of their results showed that static and fatigue strengths were distributed between base metal and MIG properties of aluminium. Fundamental research work is also carried out to investigate heat input estimation, microstructural characterisation during FSW and motion of metal using dissimilar aluminium plate combinations including process tolerance.
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