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对于金属材料形变后再结晶退火过程中晶粒长大的机制,有许多研究者认为是通过晶界迁移实现的,而晶界迁移是由晶界位错或台阶运动来完成。关于出现台阶晶界报导都是在高倍放大的透射电镜下观察到的。本文采用简单的腐蚀方法在300倍光学显微镜下观察到了晶体中的巨型台阶晶界。一、试验方法工业纯铁由太原钢厂提供,含碳量为0.03％。切割成压缩试样在60吨万能试验机上进行压缩变形。形变是在室温下进行的。试样分为2组:(1)经80％形变后,分别在
For the mechanism of grain growth during the recrystallization annealing after metal material deformation, many researchers think that it is achieved by grain boundary migration, which is caused by grain boundary dislocation or step motion. Observations on stepped grain boundaries were observed under high magnification TEM. In this paper, a simple etching method was used to observe the giant step boundary in the crystal under a 300x optical microscope. First, the test method Industrial pure iron from Taiyuan Steel, carbon content of 0.03%. Cut into compressed samples in 60 tons of universal testing machine for compression and deformation. Deformation is carried out at room temperature. Samples were divided into 2 groups: (1) After 80% deformation, respectively