Jen Shou Lin

US Patent:

20150368773, Dec 24, 2015

Filed:

Jan 28, 2015

Appl. No.:

14/607912

Inventors:

- Pittsburgh PA, US
Dhruba J. Chakrabarti - Rego Park NY, US
Diana K. Denzer - Lower Burrell PA, US
Jen C. Lin - Export PA, US
John Newman - Export PA, US
Gregory B. Venema - Bettendorf IA, US
Cagatay Yanar - Bethel Park PA, US
Julien Boselli - Pittsburgh PA, US

International Classification:

C22F 1/053
C22C 21/10

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 instantly disclosed alloys are 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.

US Patent:

20140227131, Aug 14, 2014

Filed:

Apr 17, 2014

Appl. No.:

14/255536

Inventors:

- Pittsburgh PA, US
Dhruba J. Chakrabarti - Rego Park NY, US
Diana K. Denzer - Lower Burrell PA, US
Jen C. Lin - Export PA, US
John Newman - Export PA, US
Gregory B. Venema - Bettendorf IA, US
Cagatay Yanar - Bethel Park PA, US
Julien Boselli - Pittsburgh PA, US

Assignee:

ALCOA INC. - Pittsburgh PA

International Classification:

C22C 21/10

US Classification:

420532

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 instantly disclosed alloys are 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.