Patent ID: 7879162
Filing Date: 2011-02-01
Classification: C22C,C22F

Abstract:
1. A heat treatable aluminum alloy consisting of: about 1 to about 8 weight percent magnesium; at least one of about 3 to about 12 weight percent zinc; about 0.2 to about 3 weight percent copper; about 0.5 to about 3 weight percent lithium; about 4 to about 25 weight percent silicon; at least one first element selected from the group consisting of about 0.1 to about 4 weight percent scandium; about 0.1 to about 20 weight percent erbium, about 0.1 to about 15 weight percent thulium, about 0.1 to about 25 weight percent ytterbium, and about 0.1 to about 25 weight percent lutetium; at least one second element selected from the group consisting of about 0.1 to about 20 weight percent gadolinium, about 0.1 to about 20 weight percent yttrium, about 0.05 to about 4 weight percent zirconium, about 0.05 to about 10 weight percent titanium, about 0.05 to about 10 weight percent hafnium, and about 0.05 to about 5 weight percent niobium; no more than about 1.0 weight percent total other elements including impurities; no more than about 0.1 weight percent iron, about 0.1 weight percent chromium, about 0.1 weight percent manganese, about 0.1 weight percent vanadium, about 0.1 weight percent cobalt, and about 0.1 weight percent nickel; and the balance substantially aluminum; wherein the alloy is formed by rapid solidification processing at a cooling rate greater than about 10