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Deformation mechanism temperature-dependence of AZ31 magnesium alloy

  • H. L. Kim
  • Y. W. Chang
Article

Abstract

The deformation behavior of AZ31 Mg alloy is studied here in relation to the temperature. A rolled plate with a thickness of 50 mm was first homogenized at 400 °C for 4 h before preparing test specimens with the tensile axis parallel to the rolling direction (RD). A series of tensile tests was then carried out at a strain rate of 10−2/s together with load relaxation tests to obtain flow curves in terms of the stress and strain rate at room temperature (RT), 100 °C, 200 °C, and 300 °C. The flow curves were found to represent the usual grain matrix deformation (GMD) behavior, consisting of the accumulation and relaxation of glide dislocations at temperatures of less than 100 °C. At temperatures greater than 200 °C, grain boundary sliding (GBS) was found to play an important role, as described in theories related to an internal variable. The GBS could be characterized as a non-Newtonian viscous flow with a power index value of M g = 0.5.

Keywords

metal deformation plasticity tensile test dislocation 

References

  1. 1.
    B. L. Mordike and T. Ebert, Mater. Sci. Eng. A 37–45, 302 (2001).Google Scholar
  2. 2.
    G. T. Bae, J. H. Bae, D. H. Kang, H. Lee, and N. J. Kim, Met. Mater. Int. 15, 1 (2009).CrossRefGoogle Scholar
  3. 3.
    J. E. Park, H. R. Kim, S. H. Ahn, and Y.W. Chang, Met. Mater. Int. 15, 515 (2009).CrossRefGoogle Scholar
  4. 4.
    T. Mukai, H. Watanabe, and K. Higashi, Mater. Sci. Tech. 13, 1314 (2000).CrossRefGoogle Scholar
  5. 5.
    N. J. Park, J. H. Hwang, and J. S. Roh, J. Kor. Inst. Met & Mater. 47, 1 (2009).Google Scholar
  6. 6.
    J. S. Park and Y. W. Chang, Adv. Mater. Res. 26–28, 95 (2007).CrossRefGoogle Scholar
  7. 7.
    M. Mabuchi, H. Iwasaki, and K. Higashi, Mater. Sci. Forum 243, 547 (1997).CrossRefGoogle Scholar
  8. 8.
    P. Metenier, G. Conzalez-doncel, O. A. Ruano, J. Wolfenstine, and O. D. Sherby, Mater. Sci. Eng. A 125, 195 (1990).CrossRefGoogle Scholar
  9. 9.
    H. S. Lee, W. Bang, D. W. Kim, S. L. Semiatin, and Y. W. Chang, Adv. Mater. Res. 15–17, 507 (2007).CrossRefGoogle Scholar
  10. 10.
    H. S. Lee, J. S. Park, and Y. W. Chang, J. Mater. Proc. Tech. 187–188, 550 (2007).CrossRefGoogle Scholar
  11. 11.
    S. S. Park, G.T. Bae, D. H. Kang, B. S. You, and N. J. Kim, Scripta mater. 61, 223 (2009).CrossRefGoogle Scholar
  12. 12.
    T. K. Ha, H. J. Sung, K. S. Kim, and Y. W. Chang, Mater. Sci. Eng. A 271, 160 (1999).CrossRefGoogle Scholar
  13. 13.
    T. K. Ha and Y. W. Chang, Acta mater. 46, 2741 (1998).CrossRefGoogle Scholar
  14. 14.
    R. W. Balluffi, Metall. Trans. 13A, 2069 (1999).Google Scholar
  15. 15.
    Y. N. Kwon and Y. W. Chang, Metall. Mater. Trans. A 30, 2037 (1999).CrossRefGoogle Scholar
  16. 16.
    J. E. Park, S. L. Semiatin, C. S. Lee, and Y. W. Chang, Mater. Sci. Eng. A 410–411, 124 (2005).Google Scholar
  17. 17.
    D. Lee and E. W. Hart, Metall. Trans. 2A, 1245 (1971).CrossRefGoogle Scholar
  18. 18.
    J. H. Kim, S. L. Semiatin, and C. S. Lee, Mater. Sci. Eng. A 485, 601 (2008).CrossRefGoogle Scholar
  19. 19.
    Y. W. Chang, Key Eng. Mater. 340–341, 1 (2007).CrossRefGoogle Scholar
  20. 20.
    T. K. Ha and Y. W. Chang, Scripta mater. 32, 809 (1995).CrossRefGoogle Scholar
  21. 21.
    T. K. Ha, H. W. Koo, and Y. W. Chang, Met. Mater. Int. 9, 29 (2003).CrossRefGoogle Scholar
  22. 22.
    Y. G. Ko, C. S. Lee, D. H. Shin, and S. L. Semiatin, Metal. Mater. Trans. A 37, 381 (2006).CrossRefGoogle Scholar
  23. 23.
    T. K. Ha and Y. W. Chang, Scripta mater. 35, 1317 (1996).CrossRefGoogle Scholar
  24. 24.
    C. A. P. Horton, Acta metall. 18, 1159 (1970).CrossRefGoogle Scholar
  25. 25.
    Y. N. Kwon, H. J. Koh, S. Lee, N. J. Kim, and Y. W. Chang, Metal. Mater. Trans. A 32, 1649 (2001).CrossRefGoogle Scholar
  26. 26.
    Y. N. Kwon and Y. W. Chang, J. Mater. Eng. Perf. 10, 60 (2001).CrossRefGoogle Scholar

Copyright information

© The Korean Institute of Metals and Materials and Springer Netherlands 2011

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringPOSTECHGyeongbukKorea

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