Alloys or metallic compositions – Aluminum base – Copper containing
Patent
1990-01-26
1993-05-18
Dean, R.
Alloys or metallic compositions
Aluminum base
Copper containing
148418, 148439, 420533, 420539, 420543, 420545, C22C 2106
Patent
active
052119106
ABSTRACT:
Aluminum-base alloys containing Cu, Li, Zn, Mg and Ag are disclosed which possess highly desirable properties, such as relatively low density, high modulus, high strength/ductility combinations, strong natural aging response with and without prior cold work, and high artificially aged strength with and without prior cold work. In addition, the alloys possess good weldability, corrosion resistance, cryogenic properties, and elevated temperature properties. The alloys may comprise from about 1 to about 7 weight percent Cu, from about 0.1 to about 4 weight percent Li, from about 0.01 to about 4 weight percent Zn, from about 0.05 to about 3 weight percent Mg, from about 0.01 to about 2 weight percent Ag, from about 0.01 to about 2 weight percent grain refiner selected from Zr, Cr, Mn, Ti, Hf, V, Nb, B and TiB.sub.2, and the balance Al along with incidental impurities. Preferred alloys comprise from about 3.0-6.5 weight percent Cu, from about 0.5-2.6 weight percent Li, from about 0.05-2 weight percent Zn, from about 0.1-1.5 weight percent Mg, from about 0.05-1 weight percent Ag, from about 0.05-0.5 weight percent grain refiner, and the balance Al and incidental impurities. Additional elements selected from Ge, Sn, Cd, In, Be, Sr, Sc, Y, and Ca may be used in addition to, or in place of, Zn in the present alloys.
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Cho Alex
Heubaum Frank H.
Kramer Lawrence S.
Langan Timothy J.
Pickens Joseph R.
Chin Gay
Dean R.
Koehler Robert R.
Martin Marietta Corporation
Towner Alan G.
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