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采用光学显微镜、扫描电镜和透射电镜研究了Al 4 0 %Zn(摩尔分数 )二元合金的不连续析出细片层组织在冷轧后重新加热时所发生的再结晶。根据加热过程中的显微组织变化 ,确定了该合金再结晶的形核及长大机制。结果发现 ,再结晶的 2种机制为非典型形核长大机制的连续粗化和典型形核长大机制的不连续粗化 ,后者又分为在团域界面、滑移带等处发生的以变形储能为主要驱动力的粗化和在变形量很小区域发生的以界面能为主要驱动力的粗化。
The recrystallization occurred in the remelted microstructure of Al 4 0% Zn (mol fraction) binary alloy during the reheating after cold rolling by means of optical microscope, scanning electron microscope and transmission electron microscope. According to the microstructure changes during heating, the nucleation and growth mechanism of recrystallization of the alloy was confirmed. The results show that the two mechanisms of recrystallization are the continuous coarsening of the atypical nucleation and growth mechanism and the discontinuous coarsening of the typical nucleation and growth mechanism. The latter is divided into the group interface and the slip band Of the main driving force of deformation and storage of coarse and deformation in a very small area of the interface energy as the main driving force of the coarsening.