Al-Zn-Mg-Cu alloy with improved damage tolerance-strength combination properties

US7666267B2 · kind B2 · utility

Assignee

• ALERIS ALUMINUM KOBLENZ GMBH · DE

Inventors

• Rinze Benedictus · Delft, NL
• Christian Joachim Keidel · Montabaur, DE
• Alfred Ludwig Heinz · Niederahr, DE
• Nedia Telioui · Rotterdam, NL

Key dates

• Filing date: Apr 9, 2004
• Grant date: Feb 23, 2010
• Expiry date: Apr 30, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/053
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An Al—Zn—Mg—Cu alloy with improved damage tolerance-strength combination properties. The present invention relates to an aluminium alloy product comprising or consisting essentially of, in weight %, about 6.5 to 9.5 zinc (Zn), about 1.2 to 2.2% magnesium (Mg), about 1.0 to 1.9% copper (Cu), preferable (0.9Mg−0.6)≦Cu≦(0.9Mg+0.05), about 0 to 0.5% zirconium (Zr), about 0 to 0.7% scandium (Sc), about 0 to 0.4% chromium (Cr), about 0 to 0.3% hafnium (Hf), about 0 to 0.4% titanium (Ti), about 0 to 0.8% manganese (Mn), the balance being aluminium (Al) and other incidental elements. The invention relates also to a method of manufacturing such as alloy.