High Temperature Deformation Behavior of AZ31 Mg Alloy


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High temperature deformation behavior of AZ31 Mg alloy was investigated in this study on the basis of a processing map (e » 0.6). To construct a processing map, compression tests were carried out at various temperatures and strain rates. Two regions of high deformation efficiency (h) were identified as: (1) a dynamic recrystalization (DRX) domain at 250°C and 1/s and (2) a superplasticity domain at 450°C and 10-4/s. The average grain size observed in the DRX region was considerably smaller (2.9µm) than in any other region. In the superplastic condition, tensile elongation to failure approached to 1040%. At the high Z regions, flow softening occurred resulting from the dynamic recrystallization but below 1010 of Z value, flow hardening occurred due to the grain growth. Possible deformation mechanisms operating at high temperature were discussed in relation to the activation energy. A two-stage deformation method was found to be effective in enhancing the superplasticity of AZ31 Mg alloy.



Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie




B.H. Lee et al., "High Temperature Deformation Behavior of AZ31 Mg Alloy", Materials Science Forum, Vols. 475-479, pp. 2927-2930, 2005

Online since:

January 2005




[1] S.S. Park, Y.S. Park and N.J. Kim: Metals and Mater. Inter. Vol. 8 (2002), p.551.

[2] H.J. Frost and M.F. Ashby: Deformation Mechanism Maps, (Pergamon Press, Oxford 1983).

[3] R. Raj: Metall. Mater. Trans. Vol. 12A (1981), p.1089.

[4] Y.V.R.K. Prasad and T. Seshacharyulu: Inter. Mater. Reviews Vol. 43 (1998), p.243.

[5] H. Ziegler: Progress in solid mechanics, (ed. I.N. Sneddon and R. Hill), New York, Wiley (1965) Vol. 4, p.91.

[6] S.S. Valgarali and T.G. Langdon: Acta Mater. Vol. 30 (1982), p.1157.

[7] H. Watanabe, H. Tsutsui, T. Mukai, M. Kohzu, S. Tanabe and K. Higashi: Inter. Journal of Plasticity Vol. 17 (2001), p.387.

[8] X. Wu and Y. Liu: Scripta Mater. Vol. 46 (2002), p.269.

[9] J.C. Tan and M.J. Tan: Scripta Mater. Vol. 47 (2002), p.101.