Sheet made of high-toughness aluminium alloy containing...

C - Chemistry – Metallurgy – 22 – C

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C22C 21/12 (2006.01)

Patent

CA 2633420

A low-density aluminium alloy useful in an aircraft structure, in particular for fuselage sheet applications, which has a high strength, a high toughness and a high corrosion resistance, comprising: 2.1 to 2.8% Cu by weight; 1.1 to 1.7% Li by weight;, 0.1 to 0.8% Ag by weight; 0.2 to 0.6% Mg by weight; 0.2 to 0.6% Mn by weight, an amount of Fe and of Si not exceeding 0.1% by weight in each case, and inevitable impurities with a content not exceeding 0.05% by weight in each case and 0.15% by weight in total, the alloy containing substantially no zirconium.

Un alliage d'aluminium de faible masse volumique utile dans une structure d'aéronef, en particulier pour les applications de tôle de fuselage, qui a une résistance mécanique élevée, une haute ténacité et une haute résistance à la corrosion, comprenant 2,1 à 2,8 % en poids de Cu, 1,1 à 1,7 % en poids de Li, 01 à 0,8 % en poids de Ag, 0,2 à 0,6 % en poids de Mg, 0,2 à 0,6 % en poids de Mn, une quantité de Fe et de Si inférieure ou égale à 0,1 % en poids chacun, et des impuretés inévitables à une teneur inférieure ou égale à 0,05% en poids chacune et 0,15% en poids au total, l'alliage étant sensiblement exempt de zirconium.

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