Low density aluminum alloys

C - Chemistry – Metallurgy – 22 – C

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C22C 21/00 (2006.01) C22C 1/04 (2006.01) C22C 21/06 (2006.01)

Patent

CA 1228491

ABSTRACT The present invention provides a low density aluminum-base alloy, consisting essentially of the for- mula AlbalZraLibMgcTd, wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, "a" ranges from about 0.25-2 wt%, "b" ranges from about 2.7-5 wt%, "c" ranges from about 0.5-8 wt %, "d" ranges from about 0.5-5% and the balance is aluminum. The alloy has a primary, cellular-dendritic, fine-grained, supersaturated aluminum alloy solid solution phase with intermetallic phases of the constituent elements uniformly dispersed therein. A consolidated article can be produced by compacting together particles composed of the aluminum alloy of the invention in a vacuum at elevated tempera- ture. The compacted alloy is solutionized by heat treatment, quenched in a fluid bath, and optionally, stretched and aged, The microstructure of the consoli- dated article is composed of an aluminum solid solution containing a substantially uniform distribution of fine intermetallic precipitates.

474001

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