利用电磁学理论并结合电脉冲处理细化机制推算出凝固过程中结晶雨产生及激冷层形成时的脉冲电压临界值.对结晶雨出现时等效电流及其影响因素进行模型研究,分析电脉冲作用下合金凝固行为的特点,指出电脉冲处理组织细化时域应处于结晶雨产生与激冷层形成之间.此外,以该条件下Al-5％Cu合金的凝固组织特点对模型进行了验证.
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