Microstructure and mechanical properties of the dissimilar welded joint of aluminum and magnesium alloys- a review

Abstract

The effective metal joining technique of friction stir welding (FSW) creates high-quality welds of incompatible alloys, which are highly challenging to fuse using the conventional fusion method. Due to their lightweight, high specific strength, elasticity, low density, and several other qualities, FSW of dissimilar Aluminum (Al)-Magnesium (Mg) and related alloys are urgently needed in various industries, including automotive, shipbuilding, and aerospace. The purpose of this study is to evaluate previous research in the area of dissimilar Al-Mg friction stir welding. The investigative approach is covered by outlining the joining process, heat production, and difficulties experienced during AlMg unification. In addition, patterns in phase evolution, microstructural evolution, mechanical characteristics, tool design, and hypotheses relating to the creation of intermetallic compounds (IMCs) are examined. Finally, this work recommends future options for welding Al-Mg alloys utilizing FSW, highlighting the most critical findings of earlier studies.