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:
Oct. 22, 2019
Filed:
Aug. 08, 2013
Aluminum alloy products having improved property combinations and method for artificially aging same
Alcoa Inc., Pittsburgh, PA (US);
Dhruba J. Chakrabarti, Woodside, NY (US);
John Liu, Murrysville, PA (US);
Jay H. Goodman, Murrysville, PA (US);
Gregory B. Venema, Bettendorf, IA (US);
Ralph R. Sawtell, Gibsonia, PA (US);
Cynthia M. Krist, Bettendorf, IA (US);
Robert W. Westerlund, Bettendorf, IA (US);
ARCONIC INC., Pittsburgh, PA (US);
Abstract
Aluminum alloy products, such as plate, forgings and extrusions, suitable for use in making aerospace structural components like integral wing spars, ribs and webs, comprises about: 6 to 10 wt. % Zn; 1.2 to 1.9 wt. % Mg; 1.2 to 2.2 wt. % Cu, with Mg≤(Cu+0.3); and 0.05 to 0.4 wt. % Zr, the balance Al, incidental elements and impurities. Preferably, the alloy contains about 6.9 to 8.5 wt. % Zn; 1.2 to 1.7 wt. % Mg; 1.3 to 2 wt. % Cu. This alloy provides improved combinations of strength and fracture toughness in thick gauges. When artificially aged per the 3-stage method of preferred embodiments, this alloy also achieves superior SCC performance, including under seacoast conditions.