High strength, ductile, low density aluminum alloys and process for making same

Patent · Tue Jul 13 04:00:00 EDT 1993

OSTI ID:6354930

Skinner, D J; Das, S K; Bye, R L

A process for increasing the strength and ductility of low density aluminum-base alloys is described comprising the steps of subjecting a rapidly solidified Al-Li alloy, to multiple aging treatments to form therein a microstructure wherein a high density of shear resistant dispersoids in the form of composite Al[sub 3](Li, Zr) precipitate and are substantially uniformly distributed, said alloy consisting essentially of the formula Al[sub bal]Zr[sub a]Li[sub b]X[sub c], wherein X is at least one element selected from the group consisting of Cu, Mg, Si, Sc, Ti, U, Hf, Be, Cr, V, Mn, Fe, Co and Ni, a' ranges from about 0.2-0.6 wt %, b' ranges from about 2.5-5 wt %, c' ranges from 0 to about 5 wt % and the balance is aluminum.

• Assignee: AlliedSignal Inc., Morris Township, NJ (United States)
• Patent Number(s): A; US 5226983
• Application Number: PPN: US 7-786683
• OSTI ID: 6354930
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
ACTINIDE ALLOYS
AGING
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
BERYLLIUM ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
COBALT ALLOYS
COPPER ALLOYS
DISPERSIONS
DUCTILITY
FABRICATION
HAFNIUM ALLOYS
IRON ALLOYS
LITHIUM ALLOYS
MAGNESIUM ALLOYS
MANGANESE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
PHASE TRANSFORMATIONS
PRECIPITATION
SCANDIUM ALLOYS
SEPARATION PROCESSES
SHEAR PROPERTIES
SILICON ALLOYS
SOLIDIFICATION
TENSILE PROPERTIES
TITANIUM ALLOYS
URANIUM ALLOYS
VANADIUM ALLOYS
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS