J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (5): 742-751.DOI: 10.1016/j.jmst.2018.11.013

• Orginal Article • Previous Articles     Next Articles

Three principles for preparing Al wire with high strength and high electrical conductivity

J.P. Houad, R. Lib, Q. Wanga??(), H.Y. Yub, Z.J. Zhanga, Q.Y. Chenb, H. Mab, X.M. Wuc, X.W. Lid, Z.F. Zhangad?()   

  1. aMaterials Fatigue and Fracture Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences,Shenyang, 110016, China
    bNational Quality Supervision & Inspection Center of Electrical Equipment Safety Performance, Zhejiang Huadian Equipment Testing Institute, Hangzhou,310015, China;
    cElectric Power Research Institute of Liaoning Electric Power Co., Ltd., Liaoning Electric Power Co., Ltd., Shenyang, 110006, China
    dDepartment of Materials Physics and Chemistry, School of Materials Science and Engineering, Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education, Northeastern University, Shenyang, 110819, China
  • Received:2018-08-29 Accepted:2018-10-04 Online:2019-05-10 Published:2019-02-20
  • Contact: Wang Q.,Zhang Z.F.
  • About author:

    1 These authors contribute equally to this paper.

Abstract:

The trade-off relation between the strength and the electrical conductivity has been a long-standing dilemma in metallic materials. In the study, three key principles, i.e. elongated grains, sharp texture and nano-scale precipitates, were presented for preparing Al wire with high strength and high electrical conductivity based on the specially designed experiments for breaking the mutually exclusive relation between the strength and the electrical conductivity. The results show that the elongated grains could lead to a higher electrical conductivity in Al wire without sacrificing the strength; while, the <111> sharp texture can efficiently strengthen the Al wire without influencing the electrical conductivity. Furthermore, nano-scale precipitates with proper size can simultaneously improve the strength and electrical conductivity of Al alloy wire. Under the guidance of the above three key principles, Al wires with high strength and high conductivity were prepared.

Key words: Al wire, Texture, Precipitates, Strength, Electrical conductivity