Microstructure and texture of twin-roll cast Mg-3Al-1Zn-0.2Mn magnesium alloy

Twin-roll casting (TRC) technology has been applied to produce Mg-3Al-1Zn-0.2Mn alloy plates. The microstructure of the plates mainly consists of primary α-Mg and secondary Mg17(Al,Zn)12 phase. With directional solidification during the TRC process, deformation occurs preferentially near the surface and adjacent to the grain boundaries. Dislocation tangle, twins and recrystallized grains are visible in the TRC Mg-3Al-1Zn-0.2Mn plates. The plates show {0 0 0 2} texture in the sub-surface region and {101¯4} texture at the center.