Microstructure and Mechanical Properties of Extruded Mg-Zn-Nd-Y-Zr-Ca Alloy


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Nd, Y and Ca containing Mg-Zn-Zr alloys are produced by electromagnetic direct-chilling casting process, and extruded at a temperature of 643K with two extrusion ratios of 38:1 and 22:1, respectively. The grain size is markedly reduced from 80µm in as-cast alloy to 2~5µm in as-extruded alloy due to dynamic recrystallization, and lamellar eutectics at grain boundaries in as-cast alloy are broken up and fine precipitates in the matrix come forth during hot extrusions. Mechanical properties of the alloys are measured by tensile test from room temperature to 523K. Nd, Y and Ca are favorable to the strength of the hot-extruded alloy, especially the elevated-temperature strength, which is above 200MPa in ultimate tensile strength at 523K.



Materials Science Forum (Volumes 488-489)

Edited by:

W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo




Q. Li et al., "Microstructure and Mechanical Properties of Extruded Mg-Zn-Nd-Y-Zr-Ca Alloy", Materials Science Forum, Vols. 488-489, pp. 385-388, 2005

Online since:

July 2005




[1] T. Mohri, M. Mabuchi, N. Saito, M. Nakamura: Mater. Sci. Eng. Vol. A257 (1998), p.287.

[2] Z.P. Luo, D.Y. Song, S.Q. Zhang: J. Alloy. Compd. Vol. 230 (1995), p.109.

[3] D.H. Bae, S.H. Kim, D.H. Kim, W.T. Kim: Acta Mater. Vol. 50 (2002), p.2343.

[4] A. Singh, M. Nakamura, M. Watanabe, A. Kato, A.P. Tai: Scri. Mater. Vol. 49 (2003), p.417.

[5] A. Singh, A.P. Tai: Proc. of the Mg Alloys and their Application Conf. (2004), p.226.

[6] E.M. Padezhnova, E.V. Mel'nik: Russ Metall. (Engl Trans. ) Vol. 4 (1982), p.185.

[7] Z.P. Luo, S.Q. Zhang, D.S. Zhao: Scri. Metal. Mater. Vol. 28 (1993), p.1513.

[8] E.O. Hall: J. Inst. Metals Vol. 96 (1968), p.21.

[9] J.P. Eom, Q.L. Jin, S.G. Lim, B.Y. Hur: Mater. Sci. Forum Vol. 419-422 (2003).