PRODUCTION OF HIGH QUALITY BULK METALLIC GLASS SAMPLES BY LOW-PRESSURE DIE-CASTING

摘要

The present study applies a repetitive low-pressure die-casting technique for optimising the processing parameters for casting high quality amorphous Mg_(65)Cu_(25)Y_(10) samples of dimensions 3mm × 7mm × 125mm. The objective is to establish the optimal combination of casting parameters for reducing the variation in quality from a minimum number of casting experiments. This study investigates the effect of various die-casting control parameters, such as the charge temperature, injection pressure and injection velocity on the length and porosity of Mg_(65)Cu_(25)Y_(10) samples. A comprehensive processing map was generated which shows the optimum casting conditions for this alloy.