Aluminum alloy product having improved combinations of...

C - Chemistry – Metallurgy – 22 – C

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C22C 21/10 (2006.01)

Patent

CA 2506393

An alloy product having improved fatigue failure resistance, comprising about, by weight, 7.6 to about 8.4% zinc, about 2.0 to about 2.6% copper, about 1.8 to about 2.3% magnesium, about 0.088 to about 0.25% Zr, about 0.01 to about 0.09% Fe, and about 0.01 to about 0.06% Si, the balance substantially aluminum and incidental elements and impurities. The alloy product, suitable for aerospace applications, exhibits improved fatigue failure resistance than its 7055 counterpart of similar size, shape, thickness and temper.

La présente invention concerne un produit en alliage présentant une résistance améliorée aux défauts d'usure et comprenant environ, en masse, 7,9 à environ 8,4 % de zinc, environ 2,0 à environ 2,6 % de cuivre, environ 1,8 à environ 2,3 % de magnésium, environ 0,088 à environ 0,25 % de Zr, environ 0,01 à environ 0,09 % de Fe, et environ 0,01 à environ 0,06 % de Si, le complément étant essentiellement constitué d'aluminium, d'éléments accidentels et d'impuretés. Ce produit d'alliage, qui convient pour les applications aérospatiales, fait preuve d'une résistance aux défauts d'usure améliorée par rapport à sa contrepartie 7055 semblable par ses dimensions, sa forme, son épaisseur et sa trempe.

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