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US4944914A
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Titanium base alloy for superplastic forming
Assignee: JFE Engineering Corp
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Filing: 1989-11-30
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Granted: 1990-07-31
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Expires: 2009-11-30
Abstract
Abstract The invention provides a titanium alloy having improved superplastic forming characteristics and mechanical characteristics. A titanium alloy having superplastic forming characteristics consisting essentially of about 5.5 to 6.75 wt. % Al, 3.5 to 4.5 wt. % V, 0.01 to 0.2 wt. % O, 0.85 to 3.15 wt. % Fe, 0.85 to 3.25 wt. % Mo, with 2×Fe wt. %+Mo wt. % being from 3 to 8, and balance titanium; said alloy containing α-crystals having a grain size below about 6 μm in diameter. The Fe and Mo act as β-stabilizing elements and contributing elements to lowering the beta transus and to the improvement of the superplastic characteristics.
Inventors
- 👤 Atsushi Ogawa
- 👤 Hiroyoshi Suenaga
- 👤 Kuninori Minakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:25
CPC Classifications
C; C22; C22C; C22C14/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
70 words
A titanium alloy having superplastic forming characteristics consisting essentially of about 5.5 to 6.75 wt. % Al, 3.5 to 4.5 wt. % V, 0.85 to 3.15 wt. % Fe, 0.85 to 3.25 wt. % Mo, with 2×Fe wt. %+Mo wt. % being from 3 to 8, 0.01 to 0.2 wt. % oxygen and the balance titanium; said alloy containing α-crystals having a grain size below about 6 μm in diameter.
Claim 2
Dependent Claim
70 words
A titanium alloy having superplastic forming characteristics consisting essentially of about 5.5 to 6.75 wt. % Al, 3.5 to 4.5 wt. % V, 0.85 to 3.15 wt. % Fe, 0.85 to 3.25 wt. % Mo, with 2×Fe wt. %+Mo wt. % being from 3 to 8, 0.01 to 0.2 wt. % oxygen and the balance titanium; said alloy containing α-crystals having a grain size below about 6 μm in diameter.
Claim 3
Dependent Claim
22 words
The titanium base alloy of claim 1, containing about 1.5 to 2.5 wt. % Mo, and 1.5 to 2.5 wt. % Fe.
Claim 4
Dependent Claim
22 words
The titanium base alloy of claim 1, containing about 0.85 to 1.5 wt. % Mo, and 1.5 to 2.5 wt. % Fe.
Claim 5
Dependent Claim
22 words
The titanium base alloy of claim 1, containing about 1.5 to 2 5 wt. % Mo, and 0.85 to 1.5 Wt.% Fe.
Claim 6
Dependent Claim
23 words
The titanium base alloy of claim 1, containing about 0.85 to 1.5 wt. % of Mo, and 0.85 to 1.5 wt. % Fe.
Claim 7
Dependent Claim
22 words
The titanium base alloy of claim 1, containing about 2.5 to 3.15 wt. % Mo, and 0.85 to 1.5 wt. % Fe.
Claim 8
Dependent Claim
23 words
The titanium base alloy of claim 1, containing about 0.85 to 1.5 wt. % of Mo, and 2.5 to 3.15 wt. % Fe.
Claim 9
Dependent Claim
22 words
The titanium base alloy of claim 1, containing about 1.5 to 2.5 wt. % Mo, and 2.5 to 3.15 wt. % Fe.
Claim 10
Dependent Claim
22 words
The titanium base alloy of claim 1, containing about 2.5 to 3.15 wt. % Mo, and 1.5 to 2.5 wt % Fe.
Claim 11
Dependent Claim
22 words
The titanium base alloy of claim 1, containing about 2.5 to 3.15 wt. % Mo, and 2.5 to 3.15 wt. % Fe.
Claim 12
Dependent Claim
19 words
The titanium base alloy of claim 1, wherein 2×Fe wt. % +Mo wt. % is from 5 to 8.
Claim 13
Dependent Claim
19 words
The titanium base alloy of claim 1, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
Claim 14
Dependent Claim
15 words
The titanium base alloy of claim 1, containing about 5.8 to 6.5 wt. % Al.
Claim 15
Dependent Claim
15 words
The titanium base alloy of claim 1, containing about 0.07 to 0.2 wt. % oxygen.
Claim 16
Dependent Claim
19 words
The titanium base alloy of claim 2, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
Claim 17
Dependent Claim
19 words
The titanium base alloy of claim 3, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
Claim 18
Dependent Claim
19 words
The titanium base alloy of claim 4, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
Claim 19
Dependent Claim
19 words
The titanium base alloy of claim 5, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
Claim 20
Dependent Claim
19 words
The titanium base alloy of claim 6, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
Claim 21
Dependent Claim
19 words
The titanium base alloy of claim 7, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
Claim 22
Dependent Claim
19 words
The titanium base alloy of claim 8, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
Claim 23
Dependent Claim
19 words
The titanium base alloy of claim 9, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
Claim 24
Dependent Claim
19 words
The titanium base alloy of claim 10, wherein 2×Fe wt. % +Mo wt. % is from 5.5 to 7.
References Cited (Backward Citations)
US4299626A
Cited
US4886559A
Cited
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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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
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