利用透射电子显微镜研究了TA1/16MnR爆炸焊接16MnR钢板侧界面附近的显微组织变化。结果表明: 从距界面较远处的基体向界面过渡, 铁素体和珠光体内的铁素体随着所受应力的变化, 其显微组织不断发生变化, 到界面附近最终都会变成等轴晶; 其中,铁素体的等轴化是由于受到应力产生位错, 位错相互作用产生具有大角度晶界的亚晶, 大角度晶界通过迁移来实现动态再结晶; 珠光体内的铁素体的再结晶等轴化过程主要通过亚晶转动形成大角度晶界, 从而发生连续动态再结晶等轴化过程。

The microstructure evolution of 16MnR steel plate near interface of TA1/16MnR explosive welded plate was investigated by means of transmission electron microscopy (TEM). The results show that from matrix to the interface, both ferrite and ferrite in pearlite constantly transformed with the change of stress, and they both changed into equiaxed crystals at the interface. The equiaxial process of ferrite was as follows. The ferrite produced dislocations because of stress, and the high angle boundary subgrains were formed by reciprocity of dislocations. The dynamic recrystallization was realized by moving of the high angle boundaries. The equiaxial process of ferrite in pearlite was as follows. The hige angle boundaries were formed by subgrains running and the equiaxial process of ferrite in pearlite was realized by the continuous dynamic recrystallization.