中文摘要：

采用光学金相和电子背散射衍射对单晶铜线材拉拔变形过程中的组织演化进行了分析。结果表明，变形单晶铜线材组织的演化分为3个阶段；当真应变为1．96时，变形单晶铜线材由〈100〉转变为〈100〉、〈111〉以及比较弱的〈112〉丝织构，织构组分转变是由剪切变形所致；当真应变为0．94时，界面错配角小于14°，属于小角度界面，当真应变为1．96时，界面错配角超过50°，在25°～30°大角度范围出现了由织构演化形成的第2个峰。

英文摘要：

The substructure during cold drawn processing for the single crystal copper wires by the Ohno Continus Casting （OCC） has been investigated using optical microscopy and electron backscattering diffraction. It is found that the microstructure evolvement has three steps with strain increasing for the deformed single crystal copper wires. The texture component of 〈100〉 is transformed to 〈100〉, 〈111〉 and weak 〈112〉 due to the shear deformation for the deformed single crystal copper wires when the true strain is 1.96. The boundaries disorientation angles by deformation are lower than 14° and the dislocation boundaries belong to low degree boundaries when the true strain is 0.94. And the disorientation angles of some boundaries are greater than 50°, and the peak in the disorientations angle distribution produced by texture evolution appears at the angle range of 25-30° when the true strain is 1.96.