1. Microstructures and mechanical properties of as-cast and as-extruded Mg-4.50Zn-1.13Ca (wt%) alloys.
- Author
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Du, Y.Z., Zheng, M.Y., Xu, C., Qiao, X.G., Wu, K., Liu, X.D., Wang, G.J., and Lv, X.Y.
- Subjects
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MAGNESIUM alloys , *METAL microstructure , *MECHANICAL properties of metals , *MICROFABRICATION , *CRYSTAL grain boundaries , *CRYSTAL texture , *METALS , *METAL castings - Abstract
Abstract: A large Mg-4.50Zn-1.13Ca (wt%) alloy ingot 350mm in diameter and 1730mm long was successfully fabricated by semi-continuous casting. The microstructures and mechanical properties of the as-cast and as-extruded alloys were investigated. The as-cast alloy exhibits uniform chemical composition and microstructure from the centre to the surface of the ingot and mainly consists of α-Mg and Ca2Mg6Zn3. The coarse grains and network-like second phases that are distributed at the grain boundaries result in poor mechanical properties for the as-cast alloy. The mechanical properties of the as-extruded alloys are significantly enhanced. The high yield strengths of the as-extruded alloys mainly result from the fine DRXed grain and the stronger basal texture. [Copyright &y& Elsevier]
- Published
- 2013
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