Patent ID: 8778099

Claim:
A method for forming a heat treatable high strength aluminum alloy containing L1 2 dispersoids, comprising the steps of: preparing an aluminum alloy composition consisting of: at least one first element selected from the group consisting of about 0.1 to about 6.0 weight percent erbium, about 0.1 to about 10.0 weight percent thulium, about 0.1 to about 15.0 weight percent ytterbium, and about 0.1 to about 12.0 weight percent lutetium; at least one second element selected from the group consisting of about 0.1 to about 4.0 weight percent gadolinium, about 0.1 to about 4.0 weight percent yttrium, about 0.05 to about 2.0 weight percent titanium, and about 0.05 to about 1.0 weight percent niobium to the aluminum alloy; at least one third element selected from the group consisting of about 4 to about 18 weight percent silicon, about 1 to about 2 weight percent lithium, and about 3.5 to about 6.5 weight percent copper; and the balance substantially aluminum; melting the composition to form an alloy; casting the alloy to form a solid product; and heat treating the alloy to form L1 2 dispersoids.