Texture evolution and plastic deformation mechanism in magnetic pulse welding of dissimilar Al and Mg alloys

Abstract

Texture evolution and plastic deformation mechanism of the weld zones of magnetic pulse welded dissimilar 1060 pure Al and AZ31B Mg alloy have been investigated in the present work. A much refined microstructure with smaller grains and higher hardness was observed near the weld interface which has different texture types compared to the BM (base material) at both the Al side and the Mg side. The intermetallic layers at the interface of the Al side and the Mg side have the highest hardness. The region near the weld interface has higher activity of both slip and twinning. Slip occurs on two planes (111) and ( $$ \overline{1} $$ 11) in the Al BM, while the active slip systems in the Al region near the weld interface are on four planes (111), (11 $$ \overline{1} $$ ), ( $$ \overline{1} $$ 11) and (1 $$ \overline{1} $$ 1). The transition of single texture in the BM to complex texture type in the region near the weld interface at both the Al side and the Mg side was due to {111} slip and {10 $$ \overline{1} $$ 2} twinning, respectively.