Alloys or metallic compositions – Aluminum base – Copper containing
Reexamination Certificate
2004-09-06
2009-12-08
King, Roy (Department: 1793)
Alloys or metallic compositions
Aluminum base
Copper containing
C148S417000
Reexamination Certificate
active
07628953
ABSTRACT:
The present invention relates to aluminum-based alloy of Al—Cu—Mg—Li type and to an article made thereof which are intended to be used in aircraft and aerospace vehicles.While having high strength properties (ultimate strength level and yield strength level) the suggested alloy has a reduced sound conductivity upon acoustic influence.The invented alloy contains (mass. %):Li1.7-2.0Cu1.6-2.0Mg0.7-1.1Zr0.04-0.2 Be0.02-0.2 Ti0.01-0.1 Ni0.01-0.15Mn0.01-0.4 S0.5 · 10−4-1.0 · 10−4N0.5 · 10−4-1.0 · 10−4Co0.5 · 10−6-1.0 · 10−6Na0.5 · 10−3-1.0 · 10−3Al-balanceSheets of said alloy are particularly suited to be used as structural material for aircraft and aerospace vehicles in the form of skin and a primary sheets' set.
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Antipov Vladislav Valerievitch
Fedorenko Tatiana Petrovna
Fridlyander Losif Naumovitch
Kablov Evgeny Nikolaevitch
Panchenko Pyotr Vasiljevitch
Duane Morris LLP
Federalnoe Gosudarstvennoe Unitanoe Predpriyatie “Vseross
King Roy
Takeuchi Yoshitoshi
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