Aircraft structure element made of an Al-Cu-Mg alloy
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United States of America Patent
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May 27, 2003
Grant Date -
Jul 5, 2001
app pub date -
Dec 13, 2000
filing date -
Dec 28, 1999
priority date (Note) -
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Abstract
The purpose of the invention is a structure element, particularly an lower wing element of an aircraft, manufactured from a rolled, extruded or forged product made of an alloy with composition (% by weight): Cu=4.6-5.3, Mg=0.10-0.50, Mn=0.15-0.45, Si <0.10, Fe<0.15, Zn<0.20, Cr<0.10, other elements <0.05 each and <0.15 total, the remainder being Al treated by solution heat treating, quenching, controlled tension to more than 1.5% permanent deformation and aging.
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