Castability and Characteristics of High Cerium Aluminum Alloys

This chapter describes the development and the castability of near eutectic aluminum-cerium (Al-Ce) alloy systems. These alloys have good mechanical properties at high temperatures and are very castable. The castability of the binary systems is as good or better than the aluminum-silicon system with some deterioration as additional alloying elements are added. In alloy systems that use cerium in combination with common aluminum alloying elements such as silicon, magnesium, and/or copper, the casting characteristics are generally better than the aluminum-copper system. Alloying with magnesium increases room temperature strength considerably.