STIR PROCESSED CAST ALUMINUM-SCANDIUM STRUCTURES AND METHODS OF MAKING THE SAME

摘要

Friction stir processing is applied to an aluminum-scandium alloy workpiece in either a wrought or cast state including scandium-containing precipitates. The process Selectively modifies the microstructure of the aluminum-scandium workplace, for example, by reducing grain size and recrystallization of the substrate. Benefits include increased physical properties of the aluminum-scandium alloys as well as the ability to form unique alloy structures.