US2008145266A1PendingUtilityA1
High damage tolerant aa6xxx-series alloy for aerospace application
Assignee: ALERIS ALUMINUM KOBLENZ GMBHPriority: Jun 16, 2006Filed: Jun 13, 2007Published: Jun 19, 2008
Est. expiryJun 16, 2026(expired)· nominal 20-yr term from priority
B23K 2103/10C22C 21/14C22F 1/05C22F 1/04C22C 21/08C22C 21/00B23K 35/286C22C 21/16
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Claims
Abstract
A weldable aluminum alloy wrought product having high strength and improved resistance to intergranular corrosion, the alloy consisting essentially of, in weight percent: Si 0.2-1.3, Mg 0.4-1.5, Cu 0.1-1.1, Mn up to 0.7, Fe 0.02-0.3, Zn up to 0.9, Cr up to 0.25, Ti 0.06-0.19, Zr up to 0.2, Ag up to 0.5, and wherein 0.1<Ti+Cr<0.35, other elements and unavoidable impurities each <0.05, total <0.20, and the balance aluminum.
Claims
exact text as granted — not AI-modified1 . A weldable aluminum alloy wrought product having high strength and improved resistance to intergranular corrosion, the alloy consisting essentially of, in weight percent:
Si
0.2-1.3
Mg
0.4-1.5
Cu
0.1-1.1
Mn
up to 0.7
Fe
0.02-0.3
Zn
up to 0.9
Cr
up to 0.25
Ti
0.06-0.19
Zr
up to 0.2
Ag
up to 0.5,
and wherein 0.1 < Ti + Cr < 0.35, other elements and unavoidable
impurities each <0.05, total <0.20, balance aluminum.
2 . The aluminum alloy product according to claim 1 , wherein the Cr content is in a range of 0.05 to 0.25%.
3 . The aluminum alloy product according to claim 1 , wherein the Cr content is in a range of 0.08 to 0.19%.
4 . The aluminum alloy product according to claim 1 , wherein the Ti content is in a range of 0.09 to 0.19%.
5 . The aluminum alloy product according to a claim 1 , wherein 0.12<Ti+Cr<0.3.
6 . The aluminum alloy product according to a claim 1 , wherein 0.15<Ti+Cr<0.28.
7 . The aluminum alloy product according to claim 1 , wherein the Zr content is a range of 0.06 to 0.18%.
8 . The aluminum alloy product according to claim 1 , wherein the Zr content is <0.05%.
9 . The aluminum alloy product according to claim 1 , wherein the alloy is substantially free from Zr.
10 . The aluminum alloy product according to claim 1 , wherein the Zn content is in a range of 0.5 to 0.85%.
11 . The aluminum alloy product according to claim 1 , wherein the Zn content is in a range of 0.6 to 0.85%.
12 . The aluminum alloy product according to claim 1 , wherein the Zn content is in a range of <0.2%.
13 . The aluminum alloy product according to claim 1 , wherein the Zn content is in a range of <0.05%.
14 . The aluminum alloy product according to claim 1 , wherein the Si content is in a range of 0.6 to 1.15%.
15 . The aluminum alloy product according to claim 1 , wherein the Si content is in a range of 0.65 to 1.10%.
16 . The aluminum alloy product according to claim 1 , wherein the Mg content is in a range of 0.7 to 1.25%.
17 . The aluminum alloy product according to claim 1 , wherein the Mg content is in a range of 0.7 to 1.05%.
18 . The aluminum alloy product according to claim 1 , wherein the Cu content is in a range of 0.5 to 1.1%.
19 . The aluminum alloy product according to claim 1 , wherein the Cu content is in a range of 0.6 to 1.0%.
20 . The aluminum alloy product according to claim 1 , wherein the Mn content is in a range of 0.15 to 0.7%.
21 . The aluminum alloy product according to claim 1 , wherein the Mn content is in a range of 0.2 to 0.6%.
22 . The aluminum alloy product according to claim 1 , wherein the Fe content is in a range of 0.02 to 0.2%.
23 . The aluminum alloy product according to claim 1 , wherein the Mg+1.1Si<2.0%.
24 . The aluminum alloy product according to claim 1 , wherein the Mg+1.1Si<1.85%.
25 . The aluminum alloy product according to claim 1 , wherein the alloy product has in the T6 temper an intergranular corrosion depth of attack of less than 100 micron when measured according to the MIL-H-6088 test.
26 . The aluminum alloy product according to claim 1 , wherein the alloy product has in the T6 temper an intergranular corrosion depth of attack of less than 90 micron when measured according to the MIL-H-6088 test.
27 . The aluminum alloy product according to claim 1 , wherein the wrought product is in the form of a sheet or plate.
28 . The aluminum alloy product according to claim 1 , wherein the wrought product is provided with a clad layer selected from the group consisting of AA7xxx- and AA1xxx-series alloys.
29 . The aluminum alloy product according to claim 1 , wherein the wrought product is in an extruded form.
30 . The aluminum alloy product according to claim 1 , wherein the alloy product has been tempered to a T6-type condition.
31 . The aluminum alloy product according to claim 1 , wherein the alloy product is an airplane fuselage part selected from the group consisting of fuselage skin, extruded stringers and combinations thereof welded together by laser and/or mechanical welding.Join the waitlist — get patent alerts
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