Pechiney Rhenalu

Alcan Rhenalu

Alcan Rhenalu/constellium France

Constellium France

Ronan Dif

Bernard Bes

Herve Ribes

Timothy Warner

Jean-Christophe Ehrstrom

Christine Henon

Philippe Lassince

Georges Pillet

Hervé Ribes

Bernard Grange

Vincent Hochenedel

Jerome Guillemenet

The invention relates to a work-hardened product, particularly a rolled, extruded or forged product, made of an alloy with the following composition (% by weight): Cu 3.8-4.3; Mg 1.25-1.45; Mn 0.2-0.5; Zn 0.4-1.3; Fe&#x3c;0.15; Si&#x3c;0.15; Zr&#x2266;0.05; Ag&#x3c;0.01, other elements &#x3c;0.05 each and &#x3c;0.15 total, remainder Al, treated by dissolution, quenching and cold strain-hardening, with a permanent deformation of between 0.5% and 15%, and preferably between 1.5% and 3.5%. Cold strain-hardening can be achieved by controlled tension and/or cold transformation, for example rolling, die forging or drawing. This cladded metal plate type product is a suitable element to be used as aircraft fuselage skin.

Aircraft structural member made of an Al-Cu-Mg alloy

A process for making Al&#x2014;Zn&#x2014;Mg alloy products, and products formed according to such processes are disclosed. The present invention provides a product having an improved compromise between mechanical characteristics and corrosion strength.

Simplified method for making rolled Al&#x2014;Zn&#x2014;Mg alloy products, and resulting products

The invention relates to a work-hardened product, particularly a rolled, extruded or forged product, made of an alloy with the following composition (% by weight):

New alloys for potential use in applications such as in lower wing skins and fuselage skins are disclosed. Specifically, Mn-free 2&#xd7;24 alloys potentially suitable for thick plate and thin plate and sheet applications are believed to be novel and to provide unexpectedly superior properties.

AlCuMg alloys with high damage tolerance suitable for use as structural members in aircrafts

The invention relates to an Al&#x2014;Zn&#x2014;Mg&#x2014;Cu alloy worked product, characterised in that contains (percentage by weight) the remainder being aluminium with its inevitable impurities. This product preferentially has an elongation at fracture Aof at least 24% and an Rm&#xd7;Aparameter of at least 8500. It shows a good stress and intergranular corrosion resistance. It may be used for welded constructions, particularly tankers, motor car bodywork, and industrial vehicles.

Al-Mg alloy products suitable for welded construction

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.

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Saint Etienne de Saint Geoirs, France

Ronan Dif