采用电炮、金相、透射电镜等实验方法对纯铁在冲击波作用下的相变及显微组织结构变化进行了研究。电炮实验结果显示,在冲击波作用下纯铁出现了明显的相变,冲击波卸载后相变发生回复;采用金相和TEM对冲击波作用前后的纯铁样品进行显微组织结构研究,结果表明:冲击波作用下纯铁的组织结构发生了明显的变化,相变可能发生在有夹角的孪晶区域附近。 The phase transition and microstructure changes of pure iron under shock wave were studied by means of electric gun, metallography, transmission electron microscopy and other experimental methods. The experimental results of electric gun show that the pure iron shows obvious phase transformation under shock wave and the phase transformation occurs after the shock wave is unloaded. The microstructure of the pure iron before and after shock wave is studied by metallographic and TEM. The results show that: Under the action of shock wave, the structure of pure iron changes obviously, and the phase transformation may occur near the twins with angles.