Metal treatment – Stock – Age or precipitation hardened or strengthened
Patent
1995-03-22
1997-05-20
Wyszomierski, George
Metal treatment
Stock
Age or precipitation hardened or strengthened
148439, 420533, 420534, 420535, 420539, C22C 2112
Patent
active
056308892
ABSTRACT:
An extruded structural member suitable for aerospace applications and having improved combinations of strength and toughness. The member is made from a substantially vanadium-free aluminum-based alloy consisting essentially of: about 4.85-5.3 wt. % copper, about 0.5-1.0 wt. % magnesium, about 0.4-0.8 wt. % manganese, about 0.2-0.8 wt. % silver, about 0.05-0.25 wt. % zirconium, up to about 0.1 wt. % silicon, and up to about 0.1 wt. % iron, the balance aluminum, incidental elements and impurities, the Cu:Mg ratio of said alloy being between about 5 and 9, and more preferably between about 6.0 and 7.5. The invention exhibits a typical tensile yield strength of about 77 ksi or higher at room temperature and can be forged into aircraft wheels or extruded into various other product forms for use as high speed aircraft wing members, e.g. stringers or the like.
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Aluminum Company of America
Topolosky Gary P.
Wyszomierski George
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