【摘要】 通过对纯铜试棒的拉伸变形实验及其后续的电导率测定实验,研究了拉伸应变对纯铜电导率的影响规律,结果表明:拉伸变形后,纯铜的电导率变大,且电导率增大的幅度随拉伸应变的增大而减小。最后,基于实验数据建立了纯铜电导率变化量关于拉伸应变的影响模型,并借助拉伸变形试样的金相实验结果,探讨了拉伸变形对纯铜电导率影响的内在机理,金相显微组织表明,拉伸变形过程中铜棒材料内部产生的晶格畸变和变形的累积效应是铜电导率发生变化的主要原因。更多还原

【Abstract】 The influence on copper conductivity from tensile strain was studied through the tensile experiment and conductivity measurement of pure copper test sticks. The results show that the pure copper has a larger conductivity, and the increase rate of conductivity decreases when the strain increased.Finally, an influence model for pure copper conductivity about strain was proposed based on the experimental date, and the intrinsic mechanism of the influence model was discussed with the metallographic results of tensile deformation.更多还原