Alcan Rhenalu

Constellium France

Hervé Ribes

Timothy Warner

Bernard Bes

Jean-Christophe Ehrstrom

Christophe Sigli

Ronan Dif

Bernard Bés

Bernard Grange

Vincent Hochenedel

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

A low density aluminum based alloy useful in aircraft structure for fuselage sheet or light-gauge plate applications which has high strength, high fracture toughness and high corrosion resistance, comprising 2.7 to 3.4 weight percent Cu, 0.8 to 1.4 weight percent Li, 0.1 to 0.8 weight percent Ag, 0.2 to 0.6 weight percent Mg and a grain refiner such as Zr, Mn, Cr, Sc, Hf, Ti or a combination thereof, the amount of which being 0.05 to 0.13 wt. % for Zr, 0.1 to 0.8 wt. % for Mn, 0.05 to 0.3 wt. % for Cr and Sc, 0.05 to 0.5 wt. % for Hf and 0.05 to 0.15 wt. % for Ti. The amount of Cu and Li preferably corresponds to the formula Cu(wt. %)+5/3 Li(wt. %)&#x3c;5.2.

High fracture toughness aluminum-copper-lithium sheet or light-gauge plate suitable for use in a fuselage panel

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Issoire, France

Hervé Ribes