US4848647A
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Aluminum base copper-lithium-magnesium welding alloy for welding aluminum lithium alloys
Assignee: Alcoa Corp
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Filing: 1988-03-24
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Granted: 1989-07-18
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Expires: 2008-03-24
Abstract
Abstract A welding alloy is disclosed for welding together an aluminum-lithium alloy to provide a weld characterized by insensitivity to weld cracking, good resistance to weld corrosion, and the ability to develop high weld strength during subsequent aging. The welding alloy consists essentially of an aluminum base alloy containing from about 4.5 to about 6.5 wt. % Cu, from about 0.2 to about 1.5 wt. % Mg, from about 0.8 to about 2.5 wt. % Li, and from about 0.07 to about 0.20 wt. % Ti; with the following maximum amounts of specific impurities: about 0.15 wt. % Si, about 0.30 wt. % Fe, about 0.3 wt. % Zn, and about 0.3 wt. % Mn; the balance consisting essentially of aluminum and not more than about 0.15 wt. % max. total of other impurities.
Inventors
- 👤 Rebecca A. Gentry
- 👤 Richard P. Martukanitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:34
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
135 words
A welding alloy for welding together an aluminum lithium alloy capable of forming a weld characterized by insensitivity to weld cracking, good resistance to weld corrosion, and the ability to develop high weld strength during subsequent aging and consisting essentially of an aluminum base alloy containing from about 4.5 to about 6.5 wt. % Cu, from about 0.2 to about 1.5 wt. % Mg, from about 0.8 to about 2.5 wt. % Li, and from about 0.07 to about 0.20 wt. % Ti; with the following maximum amounts of specific impurities: about 0.15 wt. % Si, about 0.30 wt. % Fe, about 0.3 wt. % Zn, about 0.3 wt. % Mn and 0.15 wt. % Zr; the balance consisting essentially of aluminum and not more than about 0.15 wt. % max. total of other impurities.
Claim 2
Dependent Claim
135 words
A welding alloy for welding together an aluminum lithium alloy capable of forming a weld characterized by insensitivity to weld cracking, good resistance to weld corrosion, and the ability to develop high weld strength during subsequent aging and consisting essentially of an aluminum base alloy containing from about 4.5 to about 6.5 wt. % Cu, from about 0.2 to about 1.5 wt. % Mg, from about 0.8 to about 2.5 wt. % Li, and from about 0.07 to about 0.20 wt. % Ti; with the following maximum amounts of specific impurities: about 0.15 wt. % Si, about 0.30 wt. % Fe, about 0.3 wt. % Zn, about 0.3 wt. % Mn and 0.15 wt. % Zr; the balance consisting essentially of aluminum and not more than about 0.15 wt. % max. total of other impurities.
Claim 3
Dependent Claim
17 words
The welding alloy of claim 1 wherein the lithium content is at least about 1.0 wt. %.
Claim 4
Dependent Claim
19 words
The welding alloy of claim 1 wherein the lithium content ranges from about 1.0 to about 1.5 wt. %.
Claim 5
Dependent Claim
17 words
The welding alloy of claim 1 wherein the lithium content is at least about 1.2 wt. %.
Claim 6
Dependent Claim
19 words
The welding alloy of claim 1 wherein the magnesium content ranges from about 0.2 to about 0.7 wt. %.
Claim 7
Dependent Claim
17 words
The welding alloy of claim 1 wherein the magnesium content is at least about 0.3 wt. %.
Claim 8
Dependent Claim
17 words
The welding alloy of claim 1 wherein the copper content is at least about 6.0 wt. %.
Claim 9
Dependent Claim
134 words
A welding alloy for welding together an aluminum-lithium alloy capable of forming a weld characterized by insensitivity to weld cracking, good resistance to weld corrosion, and the ability to develop high weld strength during subsequent aging and consisting essentially of an aluminum base alloy containing from about 4.5 to about 6.5 wt. % Cu, from about 0.2 to about 0.7 wt. % Mg, from about 1.0 to about 1.5 wt. % Li, and from about 0.07 to about 0.20 wt. % Ti; with the following maximum amounts of specific impurities: about 0.15 wt. % Si, about 0.30 wt. % Fe, about 0.3 wt. % Zn, about 0.3 wt. % Mn and 0.15 wt. % Zr; the balance consisting essentially of aluminum and not more than about 0.15 wt. % max. total of other impurities.
Claim 10
Dependent Claim
134 words
A welding alloy for welding together an aluminum-lithium alloy capable of forming a weld characterized by insensitivity to weld cracking, good resistance to weld corrosion, and the ability to develop high weld strength during subsequent aging and consisting essentially of an aluminum base alloy containing from about 4.5 to about 6.5 wt. % Cu, from about 0.2 to about 0.7 wt. % Mg, from about 1.0 to about 1.5 wt. % Li, and from about 0.07 to about 0.20 wt. % Ti; with the following maximum amounts of specific impurities: about 0.15 wt. % Si, about 0.30 wt. % Fe, about 0.3 wt. % Zn, about 0.3 wt. % Mn and 0.15 wt. % Zr; the balance consisting essentially of aluminum and not more than about 0.15 wt. % max. total of other impurities.
Claim 11
Dependent Claim
17 words
The welding alloy of claim 8 wherein the lithium content is at least about 1.2 wt. %.
Claim 12
Dependent Claim
17 words
The welding alloy of claim 8 wherein the magnesium content is at least about 0.3 wt. %.
Claim 13
Dependent Claim
17 words
The welding alloy of claim 8 wherein the copper content is at least about 6.0 wt. %.
Claim 14
Dependent Claim
135 words
A welding alloy for welding together an aluminum lithium alloy capable of forming a weld characterized by insensitivity to weld cracking, good resistance to weld corrosion, and the ability to develop high weld strength during subsequent aging and consisting essentially of an aluminum base alloy containing from about 6.0 to about 6.5 wt. % Cu, from about 0.3 to about 0.7 wt. % Mg, from about 1.2 to about 1.5 wt. % Li, and from about 0.07 to about 0.20 wt. % Ti; with the following maximum amounts of specific impurities: about 0.15 wt. % Si, about 0.30 wt. % Fe, about 0.3 wt. % Zn, about 0.3 wt. % Mn and 0.15 wt. % Zr; the balance consisting essentially of aluminum and not more than about 0.15 wt. % max. total of other impurities.
Claim 15
Dependent Claim
135 words
A welding alloy for welding together an aluminum lithium alloy capable of forming a weld characterized by insensitivity to weld cracking, good resistance to weld corrosion, and the ability to develop high weld strength during subsequent aging and consisting essentially of an aluminum base alloy containing from about 6.0 to about 6.5 wt. % Cu, from about 0.3 to about 0.7 wt. % Mg, from about 1.2 to about 1.5 wt. % Li, and from about 0.07 to about 0.20 wt. % Ti; with the following maximum amounts of specific impurities: about 0.15 wt. % Si, about 0.30 wt. % Fe, about 0.3 wt. % Zn, about 0.3 wt. % Mn and 0.15 wt. % Zr; the balance consisting essentially of aluminum and not more than about 0.15 wt. % max. total of other impurities.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
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