New High Strength Magnesium Casting Alloys for Aerospace Applications

A series of new magnesium base casting alloys has been developed for high stress aerospace applications. The alloys are readily castable, have high strength, good ductility, and excellent fatigue properties. They show little or no tendency to microporosity and provide distinct advantages in control of quality. The alloys are based on the application of a new principle of heat treatment involving internal precipitation of hydride. Described in detail are ZE63A and ZE63B alloys.