HIGH STENGTH Al-Zn ALLOY AND METHOD FOR PRODUCING SUCH AN ALLOY PRODUCT

a technology of high strength and alloy, applied in the field of wrought high strength al — zn alloy products, can solve the problems of increased cost of producing such alloys, insufficient resistance to corrosion under certain conditions, hardened aluminium alloys, etc., and achieves the balance of toughness and corrosion performance, improved compression yield strength, and high strength
US20090320969A1Inactive Publication Date: 2009-12-31ALERIS ALUMINUM KOBLENZ GMBH
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
ALERIS ALUMINUM KOBLENZ GMBH
Publication Date
2009-12-31
Estimated Expiration
Not applicable · inactive patent
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Abstract

The present invention relates to a high strength Al—Zn alloy product with an improved combination of corrosion resistance and toughness, the alloy including essentially (in weight percent): Zn: 6.0-9.5, Cu: 1.3-2.4, Mg: 1.5-2.6, Mn and Zr<0.25 but preferably in a range between 0.05 and 0.15 for higher Zn contents, other elements each less than 0.05 and less than 0.25 in total, balance aluminium, wherein (in weight percent): 0.1[Cu]+1.3<[Mg]<0.2[Cu]+2.15. The invention also relates to a method to produce these alloy products, and to some preferred applications thereof such as upper wing applications in aerospace.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This claims priority from U.S. provisional patent application Ser. No. 60 / 463,723 filed Apr. 18, 2003 and European patent application No. 03076049.0 filed Apr. 10, 2003, both incorporated herein by reference in their entirety.FIELD OF THE INVENTION

[0002] The present invention relates to a wrought high strength Al—Zn alloy product with an improved combination of corrosion resistance and toughness, a method for producing a wrought high strength Al—Zn alloy product with an improved combination of corrosion resistance and toughness and a plate product of such alloy, optionally produced in accordance with the method. More specifically, the present invention relates to a wrought high strength Al—Zn alloy designated by the 7000-series of the international nomenclature of the Aluminium Association for structural aeronautical applications. Even more specifically, the present invention relates to a new chemistry window for an Al—Zn alloy product hav...

Claims

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