High damage tolerant Al-Cu alloy

US7815758B2 · kind B2 · utility

Assignee

• ALERIS ALUMINUM KOBLENZ GMBH · DE

Inventors

• Rinze Benedictus · Delft, NL
• Christian Joachim Keidel · Montabaur, DE
• Alfred Ludwig Heinz · Niederahr, DE
• Alfred Johann Peter Haszler · Vallendar, DE

Key dates

• Filing date: Nov 30, 2007
• Grant date: Oct 19, 2010
• Expiry date: Jul 9, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/057
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed is a high damage tolerant Al—Cu alloy of the AA2000 series having a high toughness and an improved fatigue crack growth resistance, including the following composition (in weight percent) Cu 3.8-4.7, Mg 1.0-1.6, Zr 0.06-0.18, Cr<0.15, Mn>0-0.50, Fe≦0.15, Si≦0.15, and Mn-containing dispersoids, the balance essentially aluminum and incidental elements and impurities, wherein the Mn-containing dispersoids are at least partially replaced by Zr-containing dispersoids. There is also disclosed a method for producing a rolled high damage tolerant Al—Cu alloy product having a high toughness and an improved fatigue crack growth resistance, and applications of that product as a structural member of an aircraft.