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US 7,252,723 B2Granted
AlCuMg alloys with high damage tolerance suitable for use as structural members in aircrafts
AssigneePechiney Rhenalu
InventorsRonan Dif, Timothy Warner, Bernard Bes
Life of this patent
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Abstract
New alloys for potential use in applications such as in lower wing skins and fuselage skins are disclosed. Specifically, Mn-free 2×24 alloys potentially suitable for thick plate and thin plate and sheet applications are believed to be novel and to provide unexpectedly superior properties.
Claims64
A substantially manganese-free aluminum alloy rolled plate product, said plate product comprising a thickness of at least 12 mm and being formed from an alloy consisting essentially of (in percent by weight):
- Cu 3.8-4.2%, Mg 1.0-1.6%, Zr 0.08-0.20%, about 300 ppm Sc
- Fe up to 0.08%, Si up to 0.09%, Mn less than 0.05%, remainder aluminum and incident impurities.
Dependencies are inferred from the claim text.