US4807798A
Expired / Lapsed
US
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Method to produce metal matrix composite articles from lean metastable beta titanium alloys
Assignee: United States Department of the Air Force
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Filing: 1986-11-26
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Granted: 1989-02-28
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Expires: 2006-11-26
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 an alpha-beta titanium alloy matrix which comprises the steps of providing a rapidly-solidified foil made of a lean metastable beta titanium 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
- 👤 Daniel Eylon
- 👤 Francis H. Froes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:08
CPC Classifications
C; C22; C22C; C22C49/00; C22C49/02; C22C49/10; C22C49/11; C22C47/00; C22C47/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 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 lean metastable beta titanium alloy which comprises the steps of: (a) providing a rapidly solidified foil 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 about 1% to 10% below the beta transus temperature of said alloy and pressure of about 1.5 to 15 ksi for about 0.25 to 24 hours to consolidate said preform.
Claim 2
Independent Claim
110 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 lean metastable beta titanium alloy which comprises the steps of: (a) providing a rapidly solidified foil 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 about 1% to 10% below the beta transus temperature of said alloy and pressure of about 1.5 to 15 ksi for about 0.25 to 24 hours to consolidate said preform.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said alloy is Ti-11.5 Mo-6Zr-4.5Sn.
Claim 4
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-1OV-2Fe-3Al.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-10Mo.
Claim 6
Dependent Claim
10 words
The method of claim 1 wherein said alloy is Ti-6.3Cr.
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) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |