ALUMINUM COPPER MAGNESIUM ALLOYS HAVING ANCILLARY ADDITIONS OF LITHIUM

ALUMINUM COPPER MAGNESIUM ALLOYS HAVING ANCILLARY ADDITIONS OF LITHIUM

An aluminum-copper-magnesium alloy having ancillary additions of lithium. The alloy composition includes from about 3 to about 5 weight percent Cu, from about 0.5 to about 2 weight percent Mg, and from about 0.01 to about 0.9 weight percent Li. The combined amount of Cu and Mg is maintained below a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Bray, Gary H, Magnusen, Paul E, Rioja, Roberto J
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:An aluminum-copper-magnesium alloy having ancillary additions of lithium. The alloy composition includes from about 3 to about 5 weight percent Cu, from about 0.5 to about 2 weight percent Mg, and from about 0.01 to about 0.9 weight percent Li. The combined amount of Cu and Mg is maintained below a solubility limit of the aluminum alloy. The alloys possess improved combinations of fracture toughness and strength, and also exhibit good fatigue crack growth resistance.