Aluminum alloy products having improved property...

Details Aluminum alloy products having improved property... Aluminum alloy products having improved property...

2005-12-06

2005-12-06

Wyszomierski, George (Department: 1742)

Alloys or metallic compositions

Aluminum base

Copper containing

C420S552000, C148S417000

Reexamination Certificate

active

06972110

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 three stage method of preferred embodiments, this alloy also achieves superior SCC performance, including under seacoast conditions.

REFERENCES:
patent: 3135633 (1964-06-01), Hornus
patent: 3542606 (1970-11-01), Westerman et al.
patent: 3645804 (1972-02-01), Ponchel
patent: 3856584 (1974-12-01), Cina
patent: 3881966 (1975-05-01), Staley et al.
patent: 3945860 (1976-03-01), Winter et al.
patent: 3947297 (1976-03-01), Reimann et al.
patent: 4189334 (1980-02-01), Dubost et al.
patent: 4200476 (1980-04-01), Dubost et al.
patent: 4294625 (1981-10-01), Hyatt et al.
patent: 4323399 (1982-04-01), Dubost et al.
patent: 4345951 (1982-08-01), Coupry et al.
patent: 4431467 (1984-02-01), Staley et al.
patent: 4477292 (1984-10-01), Brown
patent: 4488913 (1984-12-01), Ferton
patent: 4618382 (1986-10-01), Miyagi et al.
patent: 4648913 (1987-03-01), Hunt et al.
patent: 4747890 (1988-05-01), Meyer
patent: 4797165 (1989-01-01), Bretz et al.
patent: 4816087 (1989-03-01), Cho
patent: 4828631 (1989-05-01), Ponchel et al.
patent: 4832758 (1989-05-01), Brown
patent: 4863528 (1989-09-01), Brown et al.
patent: 4946517 (1990-08-01), Cho
patent: 4954188 (1990-09-01), Ponchel et al.
patent: 5066342 (1991-11-01), Rioja et al.
patent: 5108520 (1992-04-01), Liu et al.
patent: 5110372 (1992-05-01), Faure
patent: RE34008 (1992-07-01), Quist et al.
patent: 5151136 (1992-09-01), Witters et al.
patent: 5213639 (1993-05-01), Colvin et al.
patent: 5221377 (1993-06-01), Hunt et al.
patent: 5240522 (1993-08-01), Tanaka et al.
patent: 5277719 (1994-01-01), Kuhlman et al.
patent: 5413650 (1995-05-01), Jarrett et al.
patent: 5560789 (1996-10-01), Sainfort et al.
patent: 5759302 (1998-06-01), Nakai et al.
patent: 5865911 (1999-02-01), Miyasato et al.
patent: 6027582 (2000-02-01), Shahani et al.
patent: 6048415 (2000-04-01), Nakai et al.
patent: 6342111 (2002-01-01), Meki et al.
patent: 2932374 (1981-02-01), None
patent: 829552 (1998-03-01), None
patent: 377779 (1998-05-01), None
patent: 2744136 (1997-08-01), None
patent: 58[1983]-161747 (1983-09-01), None
patent: 58[1983]-213852 (1983-12-01), None
patent: 59[1984]-28555 (1984-02-01), None
“Aluminum and Aluminum Alloys”, ASM International, 1993, p 124.
“Aluminum and Aluminum Alloys”, pp 23-24.
“Metals Handbook: Desk Edition”, 2nded., ASM International, (1998), pp 419-421.
Shahani, R. et al., “High Strength 7XXX Alloys for Ultra-Thick Aerospace Plate: Optimisation of Alloy Composition”, Aluminum Alloys, vol. 2, pp. 1105-1110.
“Aluminum Wrought Products”, Metals Handbook, Second Edition, 1998, pp. 422, 445-460.
Warner, T.J. et al., “Aluminum Alloy Developments for Affordable Airframe Structures”, Third ASM International Paris Conference on Synthesis, Processing and Modelling of Advanced Materials, pp. 79-88.
“A New Approach to the Problem of Stress Corrosion Cracking in 7075-T6 Aluminum” by W. Wallace (Canadian Aeronautics & Space Journal, vol. 27, No. 3, pp. 222-232).
“Retrogression and Reaging Response of 7475 Aluminium Alloy” by Islam et al. (Metals Technology, Oct. 1983, vol. 10, pp. 386-392).
“Microstructural Study of a High-Strength Stress-Corrosion Resistant 7075 Aluminium Alloy” by Rajan et al. (Journal of Materials Science 17 (1982), pp. 2817-2824)).

Affiliated with

Also associated with

Rating

Aluminum alloy products having improved property... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Aluminum alloy products having improved property..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aluminum alloy products having improved property... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3522679