US3876474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminium base alloys
Assignee: Superform Metals Ltd
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Filing: 1972-07-20
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Granted: 1975-04-08
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Expires: 1992-07-20
Abstract
Abstract An aluminum-copper entectic alloy which contains 33% copper exhibits the phenomenon of superplasticity but does not have the low density and good corrosion characteristics of conventional aluminium-base alloys. It has now been found that aluminium-base alloys consisting of the elements normally present in either nonheat treatable aluminium-base alloys containing at least 5%Mg or at least 1%Zn or heat-treatable aluminium-base alloys containing one or more of the elements Cu, Mg, Zn, Si, Li and Mn in known combinations, and at least one of the elements Zr, Nb, Ta and Ni in a total amount of at least 0.30% substantially all of which is present in solid solution, are superplastically deformable. The remainder of the superplastically deformable alloy may be the normal impurities and incidental elements known to be incorporated in heat-treatable and non-heat treatable aluminiumbase alloys. Advantageously the alloy contains at least 0.30%Zr and preferably at least 0.40%Zr. The alloys of the invention may in some cases be deformed superplastically under isothermal conditions but it has been found advantageous to heat the alloy quickly to the super-plastic forming temperature and/or allow the temperature to rise whilst the deformation is in progress.
Inventors
- 👤 Brian Michael Watts
- 👤 Edward Frederick Emley
- 👤 Michael James Stowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:14
CPC Classifications
C; C22; C22C; C22C21/00; C22F; C22F1/00; C22F1/04; C22F1/057; Y; Y10; Y10S; Y10S420/00; Y10S420/902
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
8 words
A SUPERPLASTICALLY DEFORMABLE WROUGHT ALUMINUM-BASE ALLOY CONSISTING OF
Claim 2
Dependent Claim
8 words
A SUPERPLASTICALLY DEFORMABLE WROUGHT ALUMINUM-BASE ALLOY CONSISTING OF
Claim 3
Dependent Claim
103 words
AN ALUMINUM-BASE ALLOY SELECTED FROM THE GROUP CONSISTING OF (1-A) NON-HEAT-TREATABLE ALUMINUM-BASE ALLOYS OF ALUMINIUM AND ONE OF THE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF MG AND ZN, THE QUANTITY OF MG BEING FROM 5% TO 10% WITH ZERO TO 0.5% CU, AND THE QUANTITY OF ZN BEING FROM 1% TO 15% WITH ZERO TO 0.5% MG AND ZERO TO 0.5% CU, AND (1-B) HEAT-TREATABLE ALUMINIUM-BASE ALLOYS OF ALUMINIUM AND ONE OF THE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF CU, MG, ZN, SI, LI, MN AND MIXTURES THEREOF IN KNOWN COMBINATIONS AND QUANTITIES IN A TOTAL QUANTITY NOT EXCEEDING 10%, AND
Claim 4
Dependent Claim
103 words
AN ALUMINUM-BASE ALLOY SELECTED FROM THE GROUP CONSISTING OF (1-A) NON-HEAT-TREATABLE ALUMINUM-BASE ALLOYS OF ALUMINIUM AND ONE OF THE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF MG AND ZN, THE QUANTITY OF MG BEING FROM 5% TO 10% WITH ZERO TO 0.5% CU, AND THE QUANTITY OF ZN BEING FROM 1% TO 15% WITH ZERO TO 0.5% MG AND ZERO TO 0.5% CU, AND (1-B) HEAT-TREATABLE ALUMINIUM-BASE ALLOYS OF ALUMINIUM AND ONE OF THE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF CU, MG, ZN, SI, LI, MN AND MIXTURES THEREOF IN KNOWN COMBINATIONS AND QUANTITIES IN A TOTAL QUANTITY NOT EXCEEDING 10%, AND
Claim 5
Dependent Claim
21 words
ZR IN AN AMOUNT OF 0.3% TO 0.8% IN TOTAL CONTENT OF WHICH AT LEAST 0.25% IS PRESENT IN SOLID SOLUTION,
Claim 6
Dependent Claim
21 words
ZR IN AN AMOUNT OF 0.3% TO 0.8% IN TOTAL CONTENT OF WHICH AT LEAST 0.25% IS PRESENT IN SOLID SOLUTION,
Claim 7
Dependent Claim
75 words
Zr in an amount of 0.3% to 0.8% in total content of which at least 0.25% is present in solid solution, 3. the remainder of said superplastically deformable alloy being normal impurities and incidental elements known to be incorporated in said aluminium-base alloys. 2. A superplastic aluminum-base alloy according to claim 1, wherein said (1-b) heat-treatable aluminium-base alloy consists essentially of aluminium and Cu 1.75 to 10 Mg 0 to 2 Si 0 to 1.5
Claim 8
Dependent Claim
27 words
A superplastic aluminium-base alloy according to claim 1, wherein said (1-b) heat-treatable aluminium-base alloy consists essentially of aluminium and Cu 2.5 to 7 Mg 0 to 0.5
Claim 9
Dependent Claim
21 words
THE REMAINDER OF SAID SUPERPLASTICALLY DEFORMABLE ALLOY BEING NORMAL IMPURTIES AND INCIDENTAL ELEMENTS KNOWN TO BE INCORPORATED IN SAID ALUMINIUM-BASE ALLOYS.
Claim 10
Dependent Claim
21 words
THE REMAINDER OF SAID SUPERPLASTICALLY DEFORMABLE ALLOY BEING NORMAL IMPURTIES AND INCIDENTAL ELEMENTS KNOWN TO BE INCORPORATED IN SAID ALUMINIUM-BASE ALLOYS.
Claim 11
Dependent Claim
22 words
A superplastic aluminium-base alloy according to claim 3, in which the normal impurities include iron and silicon, the iron content ranging from
Claim 12
Dependent Claim
35 words
A superplastic aluminum-base alloy according to claim 1, wherein said (1-b) heat-treatable aluminium-base alloy consists essentially of aluminium and Cu 3.5 to 5.5 Mg 0.25 to 1.25 Si 0.25 to 1 Mn 0.25 to 1
Claim 13
Dependent Claim
31 words
A superplastic aluminium-base alloy according to claim 1, wherein said (1-b) heat-treatable aluminium-base alloy consists essentially of aluminum and Zn 2 to 8 Mg 0.75 to 4 Cu 0 to 2
Claim 14
Dependent Claim
31 words
A superplastic aluminium-base alloy according to claim 1, wherein said (1-b) heat-treatable aluminium-base alloy consists essentially of aluminium and Zn 3 to 5.5 Mg 1 to 2 Cu 0 to 0.3
Claim 15
Dependent Claim
31 words
A superplastic aluminium-base alloy according to claim 1, wherein said (1-b) heat-treatable aluminium-base alloy consists essentially of aluminium and Zn 4 to 7.5 Mg 2 to 3 Cu 1 to 2
Claim 16
Dependent Claim
27 words
A superplastic aluminium-base alloy according to claim 1, wherein said (1b) heat-treatable aluminium-base alloy consists essentially of aluminium and Si 0.4 to 0.9 Mg 0.5 to 1
Claim 17
Dependent Claim
31 words
A superplastic aluminium-base alloy according to claim 1, wherein said (1-a) non-heat-treatable aluminium-base alloy consists essentially of aluminium and Zn 1 to 15 Mg 0 to 0.5 Cu 0 to 0.5
Claim 18
Dependent Claim
28 words
A superplastic aluminium-base alloy according to claim 1, wherein said (1-a) non-heat treatable aluminium-base alloy consists essentially of aluminium and Mg 5 to 10 Cu 0 to 0.5
Claim 19
Dependent Claim
10 words
A superplastic aluminium-base alloy according to claim 1, containing at
Claim 20
Dependent Claim
27 words
A superplastic aluminium-base alloy according to claim 1, containing at least one of the following incidental elements, in a total amount not exceeding 1.25 percent by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |