Equilibrium pseudobinary Al–Mg 2 Si phase diagram

Abstract

Preliminary experiments and phase diagram calculations were conducted to determine the equilibrium phase diagram of the Al–Mg₂Si pseudobinary section. It was found that there is a narrow ternary phase field of Al+Mg₂Si+liquid in the diagram. At the pseudoeutectic composition of Al–13.9 wt-%Mg₂Si, a pseudoeutectic reaction takes place between the temperatures of 583.5 and 594°C. The solubility of Mg₂Si in Al at 583.5°C is calculated as 1.91 wt-%.