铜电导率关于拉伸变形的影响模型
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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。
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.
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.
引文
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[4]Chen H,Pendry J B,Smith D R.Special Issue on Transformation Optics[J].Journal of Optics,2016,18(4):040201.
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[6]Liu Zhaotang,Wang Jiafu,Qu Shaobo,et al.Decoupling Technique of Patch Antenna Arrays With Shared Substrate By Suppressing Near-field Magnetic Coupling Using Magnetic Metamaterials[J].Chin.Phys.B,2017,26(4):398-403.
[7]Wikipedia.Metamaterials[EB/OL].[2017-09-02].http://en.wikipedia.org/wiki/Metamaterials.
[8]Pendry J B.Negative Refraction[J].Contemporary Physics,2004,45(3):191-202.
[9]蓝梦莹.差分进化算法在印刷电路板热布局优化中的应用[D].南宁:广西大学,2016.
[10]尹福炎.电阻应变片与应变传递原理研究[J].衡器,2010,39(2):1-8.
[11]Guo X,Cheng G D,Olhoff N.Optimum Design of Truss Topology Under Buckling Constraints[J].Structural and Multidisciplinary Optimization,2005,30(3):169-180.
[12]董焱章.贴片型左手超材料的传输性能分析和构型设计优化[D].大连:大连理工大学,2013.
[13]文玉华,周富信,刘曰武,等.纳米晶铜单向拉伸变形的分子动力学模拟[J].力学学报,2002,34(1):29-35.
[14]张克实,董书惠,许凌波,等.ECAP对纯铜循环硬化/软化特性的改变[J].固体力学学报,2013,34(5):450-458.
[15]占栋,申小平,李大乔.多向挤压对工业纯铜组织和性能的影响[J].有色金属工程,2016,6(3):8-12.
[16]石艳柯,张克实.铜单晶拉伸试样表面滑移带痕迹的晶体塑性分析[J].固体力学学报,2011,32(6):557-565.
[17]张亚宁,严文,陈建.塑性变形对单晶铜线材导电性影响的研究[J].西安工业学院学报,2005,25(2):150-152.
[18]李明茂,杨斌,袁静.单晶铜线在强冷变形过程中的组织性能转变[J].特种铸造及有色合金,2011,31(12):1087-1089.
[19]石凤健.剧烈塑性变形铜及铜合金的组织、力学和导电性能[D].镇江:江苏大学,2012.
[20]阎璐,杨帅,吴春勇,等.单步冷变形对纯铜轴瓦组织和性能的影响[J].金属热处理,2015,40(1):135-139.
[21]刘国营,李文胜,罗时军.大学物理实验[M].北京:机械工业出版社,2010.
[22]张君霞,黄蕊,刘志成.电桥法测金属电阻率的实验数据处理分析[J].大学物理实验,2014,27(1):97-98.
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[24]Feynman R.The Feynman Lectures on Physics:Volume3[J].Physics Bulletin,2013,17(10):367-367.
[25]王宗申.金属板材限制模压变形工艺的实验与数值模拟研究[D].济南:山东大学,2014.
[26]Vorobieva A,Nikulin A,Shikov A,et al.The Experimental Investigation of Copper for Superconductors[J].Physica C Superconductivity,2001,354(1-4):371-374.