根据元胞自动机的模拟结果研究了AZ91合金热压缩过程中的再结晶动力学.结果表明,随着应变量增加,再结晶分数增加;随着变形温度升高,再结晶速率加快.稳态组织的平均晶粒尺寸与Zener-Hollomom参数成反比,指数为-0.05.压缩过程中,所有晶粒的平均尺寸迅速下降后缓慢减小至稳态值,原始晶粒平均尺寸呈线性减小为0,再结晶晶粒平均尺寸先增加至某一峰值后缓慢下降至稳态值.基体内同时存在的多次再结晶现象使得流变曲线呈单峰特征.
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