Pechiney Rhenalu

Constellium Issoire

Philippe Lassince

Timothy Warner

Bernard Bes

Fabrice Heymes

Philippe Lequeu

Ronan Dif

Herve Ribes

Julien Boselli

A process for forming a structure element, particularly an lower wing element of an aircraft, manufactured from a rolled, extruded or forged product made of an alloy of composition (% by weight) Cu&equals;4.6-5.3, Mg&equals;0.10-0.50, Mn&equals;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, remainder Al. The product is treated by solution heat treating, quenching, controlled tension to more than 1.5% permanent deformation and aging.

Aircraft structure element made of an Al-Cu-Mg- alloy

Rolled product for use in the manufacture of aircraft structural elements, made of an AlCuMg alloy processed by solution heat treatment, quenching and cold stretching. The product has a composition consisting essentially of, in % by weight: Fe<0.15; Si<0.15; Cu:3.8-4.4; Mg:1-1.5; Mn:0.5-0.8; Zr:0.08-0.15; other elements: <0.05 each and <0.15 total. This product has a thickness of between 6 and 60 mm, with an ultimate tensile strength R in the quenched and stretched temper >475 MPa and yield stress R (L)>370 MPa, with a ratio R /R (L)>1.25.

Product made of an AlCuMg alloy for aircraft structural elements

Aircraft structure element made of an Al-Cu-Mg alloy

Clad sheet made up of a core sheet and a cladding layer on one or two core sheet surfaces. The core sheet is formed of an alloy having the composition (% by weight) Si: 0.7-1.3, Mg: 0.6-1.2, Cu: 0.5-1.1, Mn: 0.15-1.0, Zn<0.5, Fe<0.5, Zr<0.2, Cr<0.25, other elements <0.05 each and <0.15 total, the remainder aluminum. The cladding is formed of an AlZn alloy having a thickness of between 1 and 15% of the clad sheet thickness, having the composition (% by weight) Zn: 0.25-0.7, Fe<0.40, Si<0.40, Cu, Mn, Mg, V or Ti <0.10, other elements <0.05 each and 0.15 total.

Clad aluminum alloy sheet for aircraft structural parts

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Issoire, France

Philippe Lassince