Die-Casting Parameter Sizing for AZ91D in Notebook Computer Base Shell

This study investigates die-casting process parameter optimization for magnesium alloy AZ91D. The Taguchi experimental approach with the orthogonal array was employed. Furthermore, analysis of variance (ANOVA) was applied to find the parameters, which most influence the AZ91D die-casting process in the base shell of notebook computers. Finally, the mechanical properties such as stress, elongation, and hardness were investigated, and the abruption surfaces of after tensile test were identified from scanning electron micrographs (SEM). A low fusion slurry velocity reduces both hardness and stress, and increases the number of pinholes on the cross surface.