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Abstract
Since the dynamic plastic deformation of magnesium alloy, a hexagonal close-packed metal, consists of dislocation slipping and twinning, it is assumed that the dynamic plastic deformation of magnesium alloy is controlled by the mechanism with lower resistance, i.e., dislocation slipping or twinning. So, the evolution law of dynamic plastic deformation of the alloy can be determined by that of the resistance of dislocation slipping or twinning. After the evolution equations of the deformation resistances are deduced, the dynamic constitutive model of magnesium alloy is developed in this work. The proposed model is further verified by describing the dynamic tensile and compressive deformation of AZ\(_{31}\)B magnesium alloy obtained by the split Hopkinson pressure bar device. It is observed that the simulations agree well with the experimental results.
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