US4299626A
Expired / Lapsed
US
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Titanium base alloy for superplastic forming
Assignee: Boeing North American Inc
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Filing: 1980-09-08
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Granted: 1981-11-10
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Expires: 2000-09-08
Abstract
Abstract A titanium base alloy with improved superplastic properties is provided. The alloy has 6% Al and from 1.5 to 2.5% of a beta-stabilizing element which has high diffusivity in titanium, namely Co, Fe, Cr, or Ni. In a preferred embodiment, the alloy is a Ti-6Al-4V type alloy modified by the addition of about 2% Fe.
Inventors
- 👤 Neil E. Paton
- 👤 James A. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:17
CPC Classifications
C; C22; C22C; C22C14/00; Y; Y10; Y10S; Y10S420/00; Y10S420/902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
31 words
A titanium base alloy for superplastic forming consisting essentially of about 4.5 to 6.5% Al, 1.5 to 2.5% Fe, 3.5 to 4.5% V, and balance titanium with minor additives and impurities.
Claim 2
Dependent Claim
31 words
A titanium base alloy for superplastic forming consisting essentially of about 4.5 to 6.5% Al, 1.5 to 2.5% Fe, 3.5 to 4.5% V, and balance titanium with minor additives and impurities.
Claim 3
Dependent Claim
43 words
An improvement in a titanium base alloy having about 6% Al and 4% V, said improvement comprising: about 2% of a beta-stabilizing element selected from the group consisting of Co, Fe, Cr, and Ni, whereby said titanium alloy has improved superplastic forming properties.
Claim 4
Dependent Claim
43 words
An improvement in a titanium base alloy having about 6% Al and 4% V, said improvement comprising: about 2% of a beta-stabilizing element selected from the group consisting of Co, Fe, Cr, and Ni, whereby said titanium alloy has improved superplastic forming properties.
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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |