Alloying Aluminum Alloys with Scandium

Abstract

Methods and procedures are discussed for more economic and effective use of scandium for alloying aluminum alloys. Specifically, it is recommended to introduce scandium and zirconium into aluminum alloys in a 1 : 1 ratio instead of the usual 3 : 1 with the same overall element content. It is also suggested that microalloying with scandium in an amount of 0.1% instead of 0.22% provides the required level of properties in many cases. The possibility of refining the structure of the Al – 2% Sc master alloy for increasing its adaptability (assimilation by the aluminum melt) due to an increase in crystallization rate during ingot casting and other procedures is considered.