| US 7,597,770 B2 | ||
| Aluminum-based alloy and method of fabrication of semiproducts thereof | ||
| Thomas Pfannen-Mueller, Ottobrunn (Germany); Rainer Rauh, Jetzendorf (Germany); Peter-Juergen Winkler, Ottobrunn (Germany); Roland Lang, Woerth (Germany); Iosif Naumovitch Fridlyander, Moscow (Russian Federation); Evgeny Nikolaevitch Kablov, Moscow (Russian Federation); Vladimir Solomonovitch Sandler, Moscow (Russian Federation); Svetlana Nikolaevna Borovskikh, Moscow (Russian Federation); Valentin Georgievitch Davydov, Moscow (Russian Federation); Valery Vladimirovitch Zakharov, Moscow (Russian Federation); Marina Vladimirovna Samarina, Moscow (Russian Federation); Viktor Ignatovitch Elagin, Moscow (Russian Federation); and Leonid Borisovitch Ber, Moscow (Russian Federation) | ||
| Assigned to EADS Deutschland GmbH, Munich (Germany); and All Russian Institute of Aviation Materials VIAM, Moscow (Russian Federation) | ||
| Filed on Jan. 23, 2008, as Appl. No. 12/10,326. | ||
| Application 12/010326 is a division of application No. 10/343712, abandoned, previously published as PCT/EP01/08807, filed on Jul. 30, 2001. | ||
| Claims priority of application No. 2000120272 (RU), filed on Aug. 01, 2000. | ||
| Prior Publication US 2008/0115865 A1, May 22, 2008 | ||
| Int. Cl. C22F 1/057 (2006.01) | ||
| U.S. Cl. 148—693 [148/694; 148/698; 148/699] | 7 Claims |
| 1. A method for fabricating a sheet of an aluminum-based alloy comprising 3.0-3.5% copper, 1.5-1.8% lithium, 0.05-0.12% zirconium,
0.06-0.12% scandium, 0.02-0.15% silicon, 0.02-0.2% iron, 0.0001-0.02% beryllium; and at least one element selected from the
group consisting of 0.1-0.6% magnesium, 0.02-1.0% zinc, 0.05-0.5% manganese, 0.02-0.2% germanium, 0.05-0.2% cerium, 0.005-0.02%
yttrium and 0.005-0.05% titanium; and aluminum which makes up the balance, wherein the ratio between copper/lithium (Cu/Li)
is between about 1.9 and about 2.3,
comprising
heating a billet of the alloy to 460-500° C.,
deforming at a temperature of ≧400° C.,
aging at 155-165° C. for 10-12 hours, aging at 180-190° C. for 2-5 hours and aging at 155-165° C. for 8-10 hours;
cooling the billet to 90-100° C. with cooling rate of 2-5° C./hour, and
air cooling to room temperature.
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