Patent US4746374A successfully refreshed from Google Patents.
US4746374A
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Method of producing titanium aluminide metal matrix composite articles
Assignee: United States Department of the Air Force
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Filing: 1987-02-12
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Granted: 1988-05-24
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Expires: 2007-02-12
Abstract
Abstract A method for fabricating an improved titanium alloy composite consisting of at least one high strength/high stiffness filament or fiber embedded in a titanium-aluminum base alloy matrix which comprises the steps of providing a rapidly-solidified foil made of the titanium-aluminum base alloy, fabricating a preform consisting of alternating layers of the rapidly-solidified foil and the filamentary material, and applying heat and pressure to consolidate the preform, wherein consolidation is carried out at a temperature below the beta-transus temperature of the alloy.
Inventors
- 👤 Francis H. Froes
- 👤 Daniel Eylon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:40
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/20; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
A method for fabricating a titanium alloy composite consisting of at least one filamentary material selected from the group consisting of silicon carbide, silicon carbide-coated boron, boron carbide-coated boron, and silicon-coated silicon carbide, and a titanium-aluminum base alloy containing about 10 to 50 atomic percent aluminum and about 80 to 50 atomic percent titanium which comprises the steps of: (a) providing rapidly-solidified foils, having an average beta grain size of about 2 to 20 microns, of said alloy; (b) fabricating a preform consisting of alternating layers of at least one of said filamentary materials and said foil; and (c) applying heat at a level of about 0° to 250° C. below the beta transus temperature of said alloy and applying a pressure of about 5 to 40 ksi for about 0.25 to 24 hours, to consoliate said preform.
Claim 2
Independent Claim
138 words
A method for fabricating a titanium alloy composite consisting of at least one filamentary material selected from the group consisting of silicon carbide, silicon carbide-coated boron, boron carbide-coated boron, and silicon-coated silicon carbide, and a titanium-aluminum base alloy containing about 10 to 50 atomic percent aluminum and about 80 to 50 atomic percent titanium which comprises the steps of: (a) providing rapidly-solidified foils, having an average beta grain size of about 2 to 20 microns, of said alloy; (b) fabricating a preform consisting of alternating layers of at least one of said filamentary materials and said foil; and (c) applying heat at a level of about 0° to 250° C. below the beta transus temperature of said alloy and applying a pressure of about 5 to 40 ksi for about 0.25 to 24 hours, to consoliate said preform.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the quantity of filamentary materials in said composite is about 25 to 45 volume percent.
Claim 4
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-14Al-22Nb.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-36Al.
Claim 6
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-15.8Al.
Claim 7
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-14.3Al-19.7Nb.
Claim 8
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-15Al-10.3Nb.
Claim 9
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-15.4Al-5.3Nb.
Claim 10
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-31.5Al.
Claim 11
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-14.6Al-10Nb-4W.
Claim 12
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-6.6Al-15.6Mo.
References Cited (Backward Citations)
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US4010884A
Cited
US4547435A
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US4469757A
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US4529458A
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US4499156A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |