使用DTA和LMC定向凝固淬火技术分别确定了Al-Cu-Zn合金富铝角的液相面和固/液界面溶质分凝因数.基于一维平板模型的枝晶几何形状描述, 使用数值模型计算了Al-1.5Cu-3Zn合金凝固过程中的液相浓度和平衡温度.发现在平衡凝固条件下, 液相在α相区内结束凝固, Scheil非平衡凝固条件下的凝固过程在单变量线上结束, 样品中初生晶相的含量为97.4%, 非平衡共晶含量为2.6%; 同时分析了液相混合条件对凝固路径的影响.
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