Universal Alloy Corporation

Justin D Lamb

Timothy J Langan

Victor B Dangerfield

Thomas Henri Dorin

Baptiste Thomas Jean Rouxel

A method of producing a wrought aluminum alloy product is disclosed comprising Cu, Mn, Zr, Sc and Ti. The method includes casting an unwrought billet, ingot or shape from a liquid metal bath, and homogenizing the unwrought billet, ingot or shape at an equivalent time at temperature. The homogenization process includes first stage heating within a relatively low temperature range, second stage heating within an intermediate temperature range, and third stage heating at a relatively high temperature. After homogenizing, the billet, ingot or shape is worked into an extruded product, solution heat treated, quenched, stretched to a permanent set, and artificially aged. The extruded aluminum alloy product has desirable mechanical properties and electrical conductivity.

Method for producing aluminum-copper alloys containing scandium

An improved aluminum based alloy containing lithium is disclosed. The alloy may be provided as extruded aluminum-copper-lithium products having improved combinations of strength, fracture toughness, corrosion resistance and relatively low density. The extrusion alloy may include from 2.6 to 3.0 weight percent Cu, from 1.4 to 1.75 weight percent Li, from 0.0 to 0.25 weight percent Mn, from 0.10 to 0.45 weight percent Mg, from 0.05 to 0.15 weight percent Zr, from 0.00-0.10 weight percent Ti, from 0.10 weight percent maximum Si, from 0.12 weight percent maximum Fe, from 0.20 weight percent maximum Zn, and the balance Al and incidental impurities. The alloy should also be essentially Ag-free with Ag only being an accidental impurity in levels less than 0.05 weight percent maximum. In certain embodiments, the aluminum-copper-lithium alloys may be provided in the form of extruded products having improved combinations of strength and fracture toughness.

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Canton, GA, United States of America

Justin D Lamb