The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2014
Filed:
May. 14, 2007
Aluminum alloy products having improved property combinations and method for artificially aging same
Gary H. Bray, Murrysville, PA (US);
Dhurba J. Chakrabarti, Export, PA (US);
Diana Denzer, Lower Burrell, PA (US);
Jen Lin, Export, PA (US);
John Newman, Export, PA (US);
Greg Venema, Bettendorf, IA (US);
Cagatay Yanar, Bethel Park, PA (US);
Gary H. Bray, Murrysville, PA (US);
Dhurba J. Chakrabarti, Export, PA (US);
Diana Denzer, Lower Burrell, PA (US);
Jen Lin, Export, PA (US);
John Newman, Export, PA (US);
Greg Venema, Bettendorf, IA (US);
Cagatay Yanar, Bethel Park, PA (US);
Alcoa Inc., Pittsburgh, PA (US);
Abstract
Aluminum alloy products about 4 inches thick or less that possesses the ability to achieve, when solution heat treated, quenched, and artificially aged, and in parts made from the products, an improved combination of strength, fracture toughness and corrosion resistance, the alloy consisting essentially of: about 6.8 to about 8.5 wt. % Zn, about 1.5 to about 2.00 wt. % Mg, about 1.75 to about 2.3 wt. % Cu; about 0.05 to about 0.3 wt. % Zr, less than about 0.1 wt. % Mn, less than about 0.05 wt. % Cr, the balance Al, incidental elements and impurities and a method for making same. The invention alloy is useful in making structural members for commercial airplanes including, but not limited to, upper wing skins and stringers, spar caps, spar webs and ribs of either built-up or integral construction. The invention alloy may be aged by 2 or 3 step practices while exceeding the SCC requirements for applications for which the invention alloy is primarily intended. The flexibility of the invention in this regard is useful for its application in multi-alloy or multi-material systems joined by welding or bonding and subsequently aged.