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

摘要

1. The product is a wrought aluminum alloy with high strength and fracture toughness and high fatigue resistance and low fatigue crack growth rate, containing, wt.%: Cu from 4.4 to 5.5! Mg from 0.3 to 1.0, so -1,1 [Mg] + 5,38≤ [Cu] ≤5,5! Fe 0,20! Si 0,20! Zn from 0.10 to 0.40! and Mn in the range from 0.15 to 0.35 as a dispersoid-element combined with Ag in the range of 0.2 to 0.8 and, optionally, one or more dispersoid-elements selected from the group consisting of: ! Zr 0,5! Sc 0,7! Cr 0,4! Hf 0,3! Ti 0,4! V 0,4,! the balance being aluminum and other impurities or incidental elements. ! 2. The product of wrought aluminum alloy according to claim 1, in which! Mg 0.35 to 0.78. ! 3. The product of wrought aluminum alloy according to claim 1, in which! Cu from 4.4 to 5,35,! Mg 0.45 to 0.75,! and wherein -0,33 [Mg] + 5,15≤ [Cu] ≤5,35. ! 4. The product of wrought aluminum alloy according to claim 1, in which! Mg 0.45 to 0.75! and wherein -0,90 [Mg] + 5,60≤ [Cu] ≤5,5. ! 5. The product of wrought aluminum alloy according to claim 4, wherein the content of Cu is ≤5,35%. ! 6. The product of wrought aluminum alloy according to any one of claims 1-5, wherein the content of Zr is in the range of up to 0.3%, preferably in the range of up to 0.15%. ! 7. The article of wrought aluminum alloy according to any one of claims 1-5, wherein the Mn content is in the range of 0.20 to 0.35%, preferably in the range from 0.25 to 0.35%. ! 8. The product of wrought aluminum alloy according to any one of claims 1-5, wherein the Ag content is in the range of up to 0.6%, preferably in the range from 0.25 to 0.50%, or more preferably in the range of from 0 32 to 0.48%. ! 9. The product of wrought aluminum alloy according to any of claims 1-5, to