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

Xiao Dong Peng; Yan Yang; Qun Yi Wei; Wei Dong Xie; Xu Ning

doi:10.4028/www.scientific.net/MSF.686.247

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Microstructure and Solidification Behavior of Permanent-Mould-Cast Mg-9Li-3Al-XSr Magnesium Alloy
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HomeMaterials Science ForumMaterials Science Forum Vol. 686Microstructure and Solidification Behavior of...

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

Abstract:

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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Advanced Structural Materials, IUMRS-ICA 2010

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Materials Science Forum (Volume 686)

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247-252

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https://doi.org/10.4028/www.scientific.net/MSF.686.247

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Online since:

June 2011

Authors:

Xiao Dong Peng, Yan Yang, Qun Yi Wei, Wei Dong Xie, Xu Ning

Keywords:

Mg-Li Alloy, Microstructure, Solidification Behavior, Strontium

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