Microstructure and Solidification Behavior of Permanent-Mould-Cast Mg-9Li-3Al-XSr Magnesium Alloy

Abstract:

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Mg-9Li-3Al-xSr (x=0wt%, 1.0wt%, 2.0wt%, 2.5wt%) magnesium alloys with different ingot sizees were prepared in furnace under the protection of argon atmosphere. The as-cast microstructure and solidification characteristics of Mg-9Li-3Al-xSr alloys were experimentally examined using optical microscopy, scanning electron microscopy and X-ray diffraction. The results indicate that Mg-9Li-3Al-xSr alloys are composed of α-Mg, β-Li, Mg17Al12, AlLi and Al4Sr phase. The grains of Φ10mm ingots are much smaller and the compound phase distributes much more uniformly than Φ90mm ingots. Solidification process of Mg-9Li-3Al-xSr alloys follows the principle of eutectic solidification. The microstructure of the series as-cast alloys is typical rodlike eutectic microstructure.

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Periodical:

Edited by:

Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou

Pages:

247-252

DOI:

10.4028/www.scientific.net/MSF.686.247

Citation:

X. D. Peng et al., "Microstructure and Solidification Behavior of Permanent-Mould-Cast Mg-9Li-3Al-XSr Magnesium Alloy", Materials Science Forum, Vol. 686, pp. 247-252, 2011

Online since:

June 2011

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$35.00

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