(1. 燕山大学 材料科学与化学工程学院, 066004 秦皇岛;
2. Materials Research Department, Risoe National Laboratory, Denmark)
摘 要: 采用TEM研究了多晶铜形变及再结晶的显微组织特征。结果发现：多晶铜的形变显微组织表现为3种不同类型，形变显微组织与晶粒的晶体学取向存在明显的依赖关系；在对不同形变显微组织中位错边界两侧亚晶的取向差及位错边界间距进行定量分析的基础上，估算了每一类型组织的位错密度及其储存能，发现不同类型组织间存在明显的差别；对形变后的试样进行再结晶退火后发现，再结晶形核机制为晶界弓出形核，晶界弓出方向为储存能较高的晶粒。
关键字: 晶粒取向； 形变显微组织； 位错密度；再结晶
of tensile strained copper
（1. College of Materials Science and Chemical Engineering, Yanshan University, Qinhuangdao 066004, P.R.China;
2. Materials Research Department, Risoe National Laboratory, Denmark）
Abstract:For polycrystalline copper tensile deformation to a moderate strain, the microstructure after deformation and after annealing to the start of recrystallization has been studied by transmission electron microscopy. It is found that different types of deformation microstructures develop depending on the grain orientation. Quantitative measurement of misorientation and spacing of dislocation boundaries induced during deformation has allowed an estimate of the dislocation density and the stored energy for each types of structures. Upon annealing of the deformed samples, nucleation takes place at the original grain boundaries and the nuclei grow into the local region with the highest stored energy.
Key words: grain orientation; deformation microstructure; dislocation density; recrystallization
