基于改进元胞自动机(CA)模型,综合考虑铸造,固溶处理和时效处理过程中的微观组织转变,建立了镁合金铸件微观组织演化模型；在分析Mg-Al系镁合金第二相析出过程和强化机理的基础上,建立了镁合金铸件力学性能模型；针对镁合金汽车轮毂,采用建立的模型,模拟预测了铸件关键部位的微观组织演化和力学性能.结果表明,铸态和固溶处理条件下屈服强度的预测值与实际测量平均值吻合较好,而时效处理状态下的预测值与实测平均值有一定差别,抗拉强度的模拟预测值与实际测量的平均值吻合较好.
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