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Abstract

This invention relates to a method of manufacturing highly worked pieces of AlCuMg alloy, comprising the steps of: a) casting a plate composed of (weight per cent): Cu: 3.8-4.5 Mg: 1.2-1.5 Mn: 0.3-0.5 Si<0.25 Fe<0.20 Zn<0.20 Cr<0.10 Zr<0.10 Ti<0.10, b) possibly homogenizing at a temperature between 460 and 510.degree. C. for 2 to 12 hrs, and preferably at a temperature between 470 and 500.degree. C. for a duration for 3 to 6 hrs, c) hot rolling at an input temperature between 430 and 470.degree. C., and preferably between 440 and 460.degree. C., d) cutting out sheets, e) forming in one or several processes, such as stretch forming, drawing, flow spinning, or bending, f) solution treating between 480 and 500.degree. C., for a duration between 5 min and 1 hr, g) quenching, wherein forming can take place before and after solution treatment and quenching. The invention is applicable in particular for manufacturing aircraft fuselage panels.

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First Claim