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镁合金就其晶格结构特点属于低塑性合金。镁及镁合金的塑性在很大程度上取决于变形时应力状态的类型,应力状态的类型是用主应力的大小与方向表示(图1)。
Magnesium alloy belongs to low plasticity alloy because of its lattice structure. The plasticity of magnesium and magnesium alloys largely depends on the type of stress state during deformation. The type of stress state is represented by the magnitude and direction of the principal stress (Figure 1).