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Effect of Intermediate Annealing Temperature and Aging on the Mechanical Properties and Conductivity of Al–0.2Mg–0.35Si–0.3Ce Wire Rod

  • Yuna Wu
  • Hengcheng Liao
  • Jianfeng Zhang
Conference paper

Abstract

The present study investigated the effect of intermediate annealing temperatures on the microstructure, mechanical properties and conductivity of Al–0.2Mg–0.35Si–0.3Ce wire rod, which experienced hot extrusion (named as E), cold drawing (named as D), annealing (named as A) and cold drawing, i.e. EDAD. And four intermediate annealing temperatures (150, 200, 250, 300 °C) were carried out for investigation. Microstructure observation shows that no recrystallization occurs in the wire rod when annealed at 150 and 200 °C. However, it occurs when the annealing temperature reaches 250 °C. Tensile tests indicate that the ultimate tensile strength (UTS) of the as-EDAD samples firstly increases to a maximum value of 218 Mpa when the annealing temperature increased to 150 °C, and then decreases dramatically with the temperature continuously increasing. However, the elongation and conductivity of the as-EDAD samples just go oppositely. The conductivity of the sample annealed at 300 °C reaches 57.1%IACS, which is about 3.3%IACS higher than that of the sample without annealing. The effect of aging (190 °C for 20 h) on the mechanical properties and conductivity of as-EDAD samples was also investigated. Results show that the variation trend of UTS, elongation and conductivity of the EDAD-aging samples is similar to that without aging. The UTS decreases after aging, however, elongation and conductivity both increase.

Keywords

Al–Mg–Si alloy Annealing temperature Mechanical properties Conductivity 

Notes

Acknowledgements

The authors would like to acknowledge the financial supports from Fundamental Research Funds of Jiangsu Postdoctoral Science Foundation (1501018B), Central Universities (2017B01314), National Natural Science Foundation of China (51301059) and National 973 Plan Project (2015CB057803).

References

  1. 1.
    S. Karabay, Modification of AA-6201 alloy for manufacturing of high conductivity and extra high conductivity wires with property of high tensile stress after artificial aging heat treatment for all-aluminium alloy conductors, Mater. Des., 27 (2006) 821–832.Google Scholar
  2. 2.
    S. Karabay, Influence of AlB2 compound on elimination of incoherent precipitation in artificial aging of wires drawn from redraw rod extruded from billets cast of alloy AA-6101 by vertical direct chill casting, Mater. Des., 29 (2008) 1364–1375.Google Scholar
  3. 3.
    Q. Zhao, Z. Qian, X. Cui, Y. Wu, X. Liu, Influences of Fe, Si and homogenization on electrical conductivity and mechanical properties of dilute Al-Mg-Si alloy, J. Alloy. Compd., 666 (2016) 50–57.Google Scholar
  4. 4.
    H. Liao, Y. Liu, C. Lü, Q. Wang, Effect of Ce addition on castability, mechanical properties and electric conductivity of Al-0.3 Si-0.2Mg alloy, International Journal of Cast Metals Research, 28 (2015) 213–220.Google Scholar
  5. 5.
    L. Pengfei, W. Zhigang, W. Yunli, G. Xizhu, W. Zaiyun, L. Zhiqiang, Effect of Cerium on Mechanical Performance and Electrical Conductivity of Aluminum Rod for Electrical Purpose, Journal of Rare Earths, 24 (2006) 355–357.Google Scholar
  6. 6.
    Z. Naiqin, Y. Jiaxin, Y. Xianjin, C. Mengxia, L. Guojun, Effect of rare earth on microstructure and properties of 6063 aluminium alloy, J. Journal of tianjin university. 3 (1995).Google Scholar
  7. 7.
    Y. Xu, S. Wang, S. Tian, F. Du, Z. Zhou, F. Ni, Effect of Ce on the aging of AlMgSi alloy by resistance measurement, Journal of rare earths, 13 (1995) 186–189.Google Scholar
  8. 8.
    Y. Wu, J. Xiong, R. Lai, X. Zhang, Z. Guo, The microstructure evolution of an Al-Mg-Si-Mn-Cu-Ce alloy during homogenization, J. Alloy. Compd., 475 (2009) 332–338.Google Scholar
  9. 9.
    H. Liao, Y. Wu, Y. Wang, Microstructure Evolution of Al-0.35%Si-0.2%Mg-0.3%Ce Alloy During Hot Extrusion and Its Contributions to Performances, J. of Materi Eng and Perform, 24 (2015) 2503–2510.Google Scholar
  10. 10.
    X. Ji, H. Zhang, S. Luo, F. Jiang, D. Fu, Microstructures and properties of Al-Mg-SI alloy overhead conductor by horizontal continuous casting and continuous extrusion forming process, Mater. Sci. Eng. A, 649 (2016) 128–134.Google Scholar
  11. 11.
    C.H. Liu, J. Chen, Y.X. Lai, D.H. Zhu, Y. Gu, J.H. Chen, Enhancing electrical conductivity and strength in Al alloys by modification of conventional thermo-mechanical process, Mater. Des., 87 (2015) 1–5.Google Scholar
  12. 12.
    K. Yoshida, K. Doi, Improvement of Ductility of Aluminum Wire for Automotive Wiring Harness by Alternate Drawing, Procedia Engineering, 81 (2014) 706–711.Google Scholar
  13. 13.
    M. Mirzaei, M.R. Roshan, S.A. Jenabali Jahromi, Microstructure and mechanical properties relation in cold rolled Al 2024 alloy determined by X-ray line profile analysis, Mater. Sci. Eng. A, 620 (2015) 44–49.Google Scholar
  14. 14.
    D. Ke, L. Hengcheng, J. Qiumin, T. Yun, Effect of hot extrusion on mechanical properties and microstructure of near eutectic Al-12.0%Si-0.2%Mg alloy, Mater. Sci. Eng. A, 527 (2010) 6887–6892.Google Scholar
  15. 15.
    L. Lu, Y. Shen, X. Chen, L. Qian, K. Lu, Ultrahigh strength and high electrical conductivity in copper, Science, 304 (2004) 422–426.Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.College of Mechanics and MaterialsHohai UniversityNanjingChina
  2. 2.School of Materials Science and EngineeringSoutheast UniversityNanjingChina

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