【摘要】 为了研究多晶体中晶粒取向对其形变显微组织的影响,采用透射电镜定量表征了拉伸变形无氧高纯铜(OFHC)的显微组织,研究了形变显微组织与晶粒取向之间的相关性.结果表明:在晶粒内部形变显微组织均匀一致,而在不同晶粒之间则存在明显差异;根据位错组态的不同可将形变组织分为3种类型,即I型组织、II型组织、III型组织;不同类型形变显微组织与晶粒取向间存在明显的相关性.更多还原

【Abstract】 The results of study on the microstructural characteristics and correlation between microstructure and orientations of grains in tensile strained OFHC using TEM show that the deformation microstructure within a grain is basically homogeneous but significant grain to grain variations exist; the deformation microstructures can be grouped into three types as Type I,Type II and Type III,i.e. Type 1: The grains are subdivided by long and straight dislocation boundaries on crystallographic {111} planes. These dislocation boundaries delineate cell blocks which contain ordinary dislocation cells. Type 2: The grains are subdivided by ordinary dislocation cell boundaries defining a three dimensional cell structure. Type 3: The grains are subdivided as for Type 1, but the dislocation boundaries are not on crystallographic {111} planes; a clear correlation exists between types of microstructure and grain orientation exists.更多还原