Deep drawing of ZK60 magnesium sheets fabricated using ingot and twin-roll casting methods

Deep drawing was carried out on two different ZK60 (Mg-Zn-Zr) magnesium sheets fabricated via ingot and twin-roll casting methods. The effects of the microstructure and texture on the deep drawability and the associated microstructural evolution of ZK60 alloys were examined. Twin-roll casted sheets with refined particles were stronger and showed greater elongation than ingot-casted sheets. Moreover, they were fully deep-drawn at lower temperatures than ingot-casted sheets, and the deep drawability of the ingot-casted sheets was better at a high deformation rate compared to that of the twin-roll casted sheets. During the deep drawing process, the ingot-casted sheets with large grains experienced more tensile twinning than the twin-roll casted sheets, and shear bands were observed. The twin-roll casted sheets revealed peak broadening of the basal texture along the TD and peak splitting along the RD. Thickness variations of the drawn cups showed that the twin-roll casted sheets resisted wall thinning more effectively than the ingot-casted sheets. [Display omitted] •Evolution of microstructure and texture of ZK60 (Mg-5.5Zn-0.5Zr) was examined during deep drawing.•Two different ZK60 alloys of ingot casted (IC) and twin-roll casted (TRC) were compared.•Major deformation modes between the IC and TRC sheets were different during drawing process.•Tensile twinning and shear bands were frequently observed in IC cups.•Peak broadening along the TD and a peak split along the RD were more observed in TRC cups.