Date of Award

2014

Publication Type

Master Thesis

Degree Name

M.A.Sc.

Department

Mechanical, Automotive, and Materials Engineering

Keywords

Applied sciences, Am60, Grain refiner, Squeeze casting

Supervisor

Hu, Henry

Rights

info:eu-repo/semantics/openAccess

Abstract

The effect of hexachloroethane (C 2 Cl 6 ) and calcium carbide (CaC 2 ) as grain refiners added into the squeeze casting AM60 magnesium alloys was investigated in this study. The results of thermal analysis and microstructural analysis indicate the occurrence of heterogeneous nucleation of primary magnesium during solidification. The microstructural analysis suggests that the nucleation behaviors of C 2 Cl 6 /CaC 2 -treated AM60 alloys may be attributed to the increase in nuclei and nucleation rate during the solidification of the magnesium alloy. Grain size measurements indicated that both C 2 Cl 6 and CaC 2 have the capability to unify the average grain sizes of squeeze cast magnesium alloy AM60 among different section thicknesses. The tensile testing indicate the improved tensile properties especially in the thick sections. The corrosion tests showed an increase in corrosion resistance as the grain refiners were added into the squeeze cast alloy AM60.

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