HIGH-DAMAGE TOLERANT ALUMINIUM ALLOY PRODUCT IN PARTICULAR FOR AEROSPACE APPLICATIONS

摘要

The invention relates to an aluminium alloy wrought product with high strength and fracture toughness and high fatigue resistance and low fatigue crack growth rate, and having a composition of (in wt.%): 0.3 to 1.0 % Mg, 4.4 to 5.5% Cu, 0 to 0.20% Fe, 0 to 0.20% Si, 0 to 0.40% Zn, and Mn in a range 0.15 to 0.8 as dispersoids forming element in combination with one or more of dispersoids forming elements selected from the group consisting of: Zr, Sc, Cr, Hf, Ag, Ti, V, the balance being aluminium (Al) and other incidental elements, and whereby there is a limitation of the Cu-Mg content such that: -1.1[Mg]+5.38<= [Cu]<= 5.5. The invention further relates to a method of manufacturing such a product.