Frank H Heubaum

50323598, Jul 16, 1991

Mar 23, 1989

7/327927

Joseph R. Pickens - Beltsville MD
Frank H. Heubaum - Baltimore MD
Lawrence S. Kramer - Baltimore MD
K. Sharvan Kumar - Baltimore MD

Martin Marietta Corporation - Bethesda MD

C22C 2106

420533

A family of alloys based upon aluminum-copper-magnesium-silver alloys to which lithium has been added, within specified ranges, exhibits superior ambient- and elevated-temperature strength, superior ductility at ambient and elevated temperatures, extrudability, forgeability, weldability, and an unexpected natural aging response.

51223392, Jun 16, 1992

Feb 22, 1990

7/483154

Joseph R. Pickens - Beltsville MD
Frank H. Heubaum - Baltimore MD
Lawrence S. Kramer - Baltimore MD

Martin Marietta Corporation - Bethesda MD

C22C 2106

420533

Welding alloys based upon aluminum, copper, mangesium, silver and lithium have been found to possess exceptional properties such as resistance to hot cracking, high strength and ductility, and an unexpected natural aging response. The aluminum-base alloys may contain 3. 5 to 7 weight percent Cu, 0. 05 to 1. 5 weight percent Mg, 0. 01 to 2 weight percent Ag, 0. 1 to 4 weight percent Li, and 0. 01 to 2 weight percent grain refiner.

52598977, Nov 9, 1993

Mar 23, 1989

7/327666

Joseph R. Pickens - Beltsville MD
Frank H. Heubaum - Baltimore MD
Lawrence S. Kramer - Baltimore MD
Timothy J. Langan - Baltimore MD

Martin Marietta Corporation - Bethesda MD

C22C 2112

148417

Aluminum-base alloys which are provided 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, higher artificially-aged strength than existing Al-Li alloys with and without prior cold work, weldability, good cryogenic properties, and good elevated temperature properties. In one embodiment, aluminum-base alloys are provided having Al-Cu-Li-Mg compositions in the following ranges: 5. 0-7. 0 Cu, 0. 1-2. 5 Li, 0. 05-4 Mg, 0. 01-1. 5 grain refiner selected from Zr, Cr, Mn, Ti, Hf, V, Nb, B, TiB. sub. 2, and mixtures thereof, and the balance essentially Al. In another embodiment, aluminum-base alloys are provided having Al-Cu-Li-Mg compositions in the following ranges: 3. 5-5. 0 Cu, 0. 8-1. 8 Li, 0. 25-1. 0 Mg, 0. 01-1. 5 grain refiner selected from Zr, Cr, Mn, Ti, Hf, V, Nb, B, TiB. sub.

54627125, Oct 31, 1995

Jul 1, 1994

8/269615

Timothy J. Langan - Baltimore MD
Joseph R. Pickens - Beltsville MD
Frank H. Heubaum - Baltimore MD
Lawrence S. Kramer - Baltimore MD

Martin Marietta Corporation - Bethesda MD

C22C 2100

420528

Aluminum-base alloys containing Cu, Li, Zn and Mg 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, cryogenic properties, and elevated temperature properties. The alloys may comprise from about 3. 5 to about 7 weight percent Cu, from about 0. 1 to about 1. 8 eight 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 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. 5 to 6.

52119106, May 18, 1993

Jan 26, 1990

7/471299

Joseph R. Pickens - Beltsville MD
Timothy J. Langan - Baltimore MD
Frank H. Heubaum - Baltimore MD
Lawrence S. Kramer - Baltimore MD
Alex Cho - Richmond VA

Martin Marietta Corporation - Bethesda MD

C22C 2106

420532

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.