Abstract
In this study, the microstructural evolution and single magnesium cell deformation behaviour of extruded Mg–6Zn–0.6Zr alloy were investigated along the extrusion direction with strain rate at 1800 s−1 using a split Hopkinson pressure bar apparatus. The microstructural evolution and deformation mechanism were studied by X-ray diffraction, electron back scatter diffraction, and transmission electron microscopy. Analysis of the microstructural evolution shows that <100> tension twinning and (0001)<110> basal plane slip were dominant when the strain was less than 6%, and <113> pyramidal plane<c+a> slip was the major deformation mechanism when the strain exceeded 6%. In particular, the transformation process of single magnesium crystal cell during deformation was studied in detail.
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