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

摘要

The invention relates to an aluminium alloy wrought product with high strengthand fracture toughness and high fatigue resistance and low fatigue crackgrowth rate, and having a composition of (in wt.%): 0.3 to 1.0 % Mg, 4.4 to5.5% Cu, 0 to 0.20% Fe, 0 to 0.20% Si, 0 to 0.40% Zn, and Mn in a range 0.15to 0.8 as dispersoids forming element in combination with one or more ofdispersoids forming elements selected from the group consisting of: Zr, Sc,Cr, Hf, Ag, Ti, V, the balance being aluminium (Al) and other incidentalelements, 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 ofmanufacturing such a product.