Effects of Cooling Rate on Solidification Microstructure of ZK60 Magnesium Alloy


Article Preview

In this paper, the influence of the cooling rate on the solidified structure of ZK60 Mg alloy has been studied by means of Gleeble-1500D thermal simulation instrument. The result showed that the grain size and grain shape depended on the cooling rate, Primary Dendrite Arm Space ( λI ) and Secondary Dendrite Arm Space ( λII) sharply decreased with the increasing of solidifying cooling rate (v) in the range of experimental cooling rate (0.2~100K/s). When superheat was constant, the empirical formulas of the relation between λI λII and v was obtained. In addition, the dependence between micro-hardness (HV) and Secondary Dendrite Arm Space ( λII) for ZK60 casting alloy was proved to be similar with Hall-Petch formula. The empirical formula for λII-HV has been proposed.



Materials Science Forum (Volumes 488-489)

Edited by:

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




C. M. Yang et al., "Effects of Cooling Rate on Solidification Microstructure of ZK60 Magnesium Alloy", Materials Science Forum, Vols. 488-489, pp. 295-298, 2005

Online since:

July 2005




[1] T. Sano, T. Saiki, S. Horikoshi, S. Fuchizawa, S. Sado: Proceedings of the International Workshop Environmental and Economic Issues Metal Processing, Nara, Japan, 1998, pp.57-63.

[2] B.L. Mordike, T. Ebert: Mater. Sci. Eng. A 302 (2001), pp.37-45.

[3] R.W. Cahn, P. Haasen, E.J. Kramer: Materials Science and Technology, vol. 8, (VCH Publishers, New York, 1996), p.113.

[4] Chunjiang Ma, Manping Liu, Guohua Wu, Wenjiang Ding, Yanping Zhu: Mater. Sci. and Eng., A00 (2003), p.1~6.

DOI: https://doi.org/10.1016/s0921-5093(02)00740-2

[5] Kura W, Fisher D J: Fundamentals of Solidification (Trans Tech Publications, 1984).

[6] C.J. Bettles, C.J. Rossouw and K. venkatesan: Magnesium alloys and Application. New York: Wiley-VCH, (2000).

[7] A. Galiyev, R. Kaibyshev and G. Gottstein: Acta mater. 49 (2001), pp.1199-1207.

[8] N.J. Petch: J. Iron Steel Inst. 174 (1953), p.25.