Effect of Zn-brazed-interface on microstructures and mechanical properties of dissimilar 2A12/AZ31 alloys friction stir lap welds

• The Al/Zn/Mg interface is a brazed interface. • Mg0.97Zn0.03, Al0.403Zn0.597 and MgZn2 formed in the brazing interface. • MgZn2 distributes near the Mg substrate, while Al0.403Zn0.597 distributes near the Al substrate.