Microstructure and Properties of Mg-6Zn-6Al-0.5Mn-0.6Si-0.1Ca Alloy

Abstract:

The Mg-6Zn-6Al-0.5Mn-0.6Si-0.1Ca alloy has been produced in a steel crucible in an electric resistance furnace protectived by CO₂+0.5%SF₆. The microstructure of the as-cast alloy consisted of matrix–α(Mg) supersaturated solid solution, τ(Mg₃₂(Al,Zn)₄₉) ternary-phase and a small polygonal type Mg₂Si phase in matrix. The τ(Mg₃₂(Al,Zn)₄₉) ternary-phase dispersion distribution in grain boundaries. After solution-treated, the amount of quasi-continuous net-shape ternary-phases reduce and small part of ternary-phases dissolve to the matrix which lead to the distribution on the matrix more uniform than as-casting condition in the alloy. The results of tensile, microhardness, impact toughness and corrosion property show that the alloy has better compressive properties.

• Periodical: Applied Mechanics and Materials (Volumes 66-68)
• Pages: 731-735
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.66-68.731
• Online since: July 2011
• Authors: Bao Feng Zhang, Ai Yun Jiang, Zhi Li, Xiao Wei Chen
• Keywords: Corrosion Property, Magnesium Alloy, Microstructure

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