High-damage tolerant alloy product in particular for aerospace applications

US8043445B2 · kind B2 · utility

Assignee

• ALERIS ALUMINUM KOBLENZ GMBH · DE

Inventors

• Rinze Benedictus · Delft, NL
• Christian Joachim Keidel · Montabaur, DE
• Alfred Ludwig Heinz · Niederahr, DE
• Hinrich Hargarter · IJmuiden, NL

Key dates

• Filing date: May 28, 2004
• Grant date: Oct 25, 2011
• Expiry date: Jan 30, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C21/16
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to an aluminium alloy wrought product with high strength and fracture toughness and high fatigue resistance and low fatigue crack growth rate, and having a composition for the alloy comprising, in weight %, about 0.3 to 1.0% magnesium (Mg), about 4.4 to 5.5% copper (Cu), about 0 to 0.20% iron (Fe), about 0 to 0.20% silicon (Si), about 0 to 0.40% zinc (Zn), and Mn in a range 0.15 to 0.8 as a dispersoids forming element in combination with one or more of dispersoids forming elements selected from the group consisting of: (Zr, Sc, Cr, Hf, Ag, Ti, V), in ranges of: 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 1.0% silver (Ag), the balance being aluminium (Al) and other incidental elements, and whereby there is a limitation of the Cu—Mg content such that −1.1[Mg]+5.38≦[Cu]≦5.5. The invention further relates to a method of manufacturing such a product.