CLAD 2XXX-series aerospace product
The invention relates to a rolled composite aerospace product comprising a 2XXX-series core layer and an Al—Mg alloy clad layer coupled to at least one surface of the 2XXX-series core layer, wherein the Al—Mg alloy is a 5XXX-series aluminium alloy comprising 0.4% to 4.8% Mg, and preferably 0.7% to 4.5% Mg.
1. A rolled composite aerospace product comprising a 2XXX-series core layer and an Al—Mg alloy clad layer coupled to at least one surface of the 2XXX-series core layer, wherein the Al—Mg alloy is a 5XXX-series aluminium alloy comprising 0.4% to 4.8% Mg, wherein the 2XXX-series alloy of the 2XXX-series core layer has a composition comprising, in wt. %,
Cu 1.9% to 7.0%,
Mg 0.30% to 1.8%,
Mn up to 1.2%,
Si up to 0.40%,
Fe up to 0.40%,
Cr up to 0.35%,
Zn up to 1.0%,
Ti up to 0.15%,
Zr up to 0.25%,
V up to 0.25%,
Li up to 2.0%,
Ag up to 0.80%,
Ni up to 2.5%,
balance being aluminium and impurities.
2. The rolled composite aerospace product according to claim 1 , wherein the Al—Mg alloy is a 5XXX-series aluminium alloy having a composition of, in wt. %:
Mg 0.4% to 4.8%
Si up to 0.3%,
Fe up to 0.5%,
Sc up to 0.5%,
Mn up to 1.5%,
Cu up to 0.2%,
Cr up to 0.25%,
Zr up to 0.25%,
Zn up to 0.5%,
Ti up to 0.2%,
impurities each <0.05%, total <0.15%, and balance aluminium.
3. The rolled composite aerospace product according to claim 1 , wherein the Al—Mg alloy is a 5XXX-series aluminium alloy comprising, in wt. %:
Mg 0.4% to 3.0%,
Si up to 0.3%,
Fe up to 0.5%,
Sc up to 0.04%,
Mn up to 1.5%,
Cu up to 0.2%,
Cr up to 0.25%,
Zr up to 0.25%,
Zn up to 0.5%,
Ti up to 0.2%,
impurities each <0.05%, total <0.15%, and balance aluminium.
4. The rolled composite aerospace product according to claim 1 , wherein the Al—Mg alloy is a 5XXX-series aluminium alloy comprising, in wt. %:
Mg 3.0% to 4.8%,
Sc 0.02% to 0.5%,
Mn up to 1%,
Zr up to 0.25%,
Cr up to 0.3%,
Ti up to 0.2%,
Cu up to 0.25%,
Zn up to 0.5%,
Fe up to 0.5%,
Si up to 0.3%,
impurities each <0.05%, total <0.15%, and balance aluminium.
5. The rolled composite aerospace product according to claim 1 , wherein the Al—Mg alloy clad layer is coupled by means of roll bonding to the at least one surface of the 2XXX-series core layer.
6. The rolled composite aerospace product according to claim 1 , wherein the Al—Mg alloy clad layer has a thickness in the range of 1% to 20% of the total thickness of the rolled composite aerospace product.
7. The rolled composite aerospace product according to claim 1 , consisting of a 2XXX-series core layer and an Al—Mg alloy clad layer coupled to one surface of the 2XXX-series core layer.
8. The rolled composite aerospace product according to claim 1 , consisting of a 2XXX-series core layer and an Al—Mg alloy clad layer coupled to both surfaces of the 2XXX-series core layer.
9. The rolled composite aerospace product according to claim 1 , wherein an interliner is positioned between the 2XXX-series core layer and the Al—Mg alloy layer, and wherein the interliner is made from a different aluminium alloy than the Al—Mg alloy layer and has a Mg-content lower than the Al—Mg alloy.
10. The rolled composite aerospace product according to claim 1 , wherein the 2XXX-series core layer ( 20 ) is from the 2x24-series alloy.
11. The rolled composite aerospace product according to claim 1 , wherein the 2XXX-series core layer ( 20 ) is in a T3, T351, T39, T42, T8 or T851 temper.
12. The rolled composite aerospace product according to claim 1 , wherein the rolled composite aerospace product ( 10 ) has a total thickness of 0.8 mm to 50.8 mm.
13. The rolled composite aerospace product according to claim 1 , wherein the rolled composite aerospace product is an aerospace structural part.
14. A rolled composite aerospace product comprising a 2XXX-series core layer and an Al—Mg alloy clad layer coupled to at least one surface of the 2XXX-series core layer, wherein the Al—Mg alloy is a 5XXX-series aluminium alloy comprising 0.4% to 4.8% Mg, wherein the rolled composite aerospace product is an aerospace structural part.