US3793010A
Expired / Lapsed
US
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Directionally solidified eutectic type alloys with aligned delta phase
Assignee: RTX Corp
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Filing: 1972-01-27
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Granted: 1974-02-19
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Expires: 1992-01-27
Abstract
Abstract A nickel alloy containing columbium and/or tantalum and chromium and/or aluminum and displaying eutectic-type behavior is unidirectionally cast under conditions resulting in coupled growth, providing a lamellar biphase or multiphase microstructure displaying about 25-40 percent of a substantially aligned delta phase, Ni3Cb, Ni3Ta or Ni3(Cb,Ta), in a nickel alloy matrix containing chromium and/or aluminum.
Inventors
- 👤 F Lemkey
- 👤 E Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:32
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
18 words
A casting according to claim 1 wherein: the delta phase comprises about 25-40 volume percent of the casting.
Claim 2
Dependent Claim
47 words
A casting according to claim 1 wherein: the gamma phase is a nickel-base alloy containing at least one element selected from the group consisting of chromium and aluminum in an amount of, as cast, not exceeding, by weight, about 35 percent chromium and about 4 percent aluminum.
Claim 3
Dependent Claim
29 words
A casting according to claim 3 wherein: the gamma phase contains both chromium and aluminum and the gamma phase, as aged, contains a fine gamma '' strengthening phase precipitate.
Claim 4
Dependent Claim
42 words
A directionally solidified alloy casting of substantially monovariant eutectic composition characterized by an anisotropic microstructure having a lamellar Ni3Cb phase substantially aligned in a nickel-base alloy matrix containing in solid solution an element selected from the group consisting of chromium and aluminum.
Claim 5
Dependent Claim
18 words
A casting as in claim 5 wherein: the Ni3Cb phase occupies about 25-40 volume percent of the casting.
Claim 6
Dependent Claim
42 words
A directionally solidified alloy casting of substantially monovariant eutectic composition characterized by an anisotropic microstructure having a lamellar NI3Ta phase substantially aligned in a nickel-base alloy matrix containing in solid solution an element selected from the group consisting of chromium and aluminum.
Claim 7
Dependent Claim
18 words
A casting as in claim 7 wherein: the Ni3Ta phase occupies about 25-40 volume percent of the casting.
Claim 8
Dependent Claim
66 words
A directionally solidified alloy casting of substantially multivariant eutectic composition characterized by an anisotropic microstructure having about 25-40 volume percent of a lamellar Ni3M phase, where M is selected from the group consisting of tantalum and columbium, embedded in substantial alignment in a nickel-base alloy matrix containing in solid solution as cast up to 35 weight percent chromium and up to about 4 weight percent aluminum.
Claim 9
Dependent Claim
20 words
A casting according to claim 9 wherein: the matrix phase also contains fine particles of a strengthening gamma '' precipitate.
References Cited (Backward Citations)
US3554817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |