US4613480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tri-nickel aluminide composition processing to increase strength
Assignee: General Electric Co
•
Filing: 1985-10-03
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Granted: 1986-09-23
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Expires: 2005-10-03
Abstract
Abstract Improvements in the strength of atomized and consolidated boron doped tri-nickel aluminides are made possible. The improved strength is achieved by cold rolling and annealing a HIPped aluminide. The improvements are to room temperature properties.
Inventors
- 👤 Keh-Minn Chang
- 👤 Shyh-Chin Huang
- 👤 Alan I. Taub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:57
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; B; B22; B22F; B22F3/00; B22F3/12; B22F3/16; C22C1/00; C22C1/04; C22C1/0433
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
A method of improving the room temperature properties of a tri-nickel aluminide base composition which comprises preparing a melt of a boron doped tri-nickel aluminide according to the expression [(Ni.sub.1-a M.sub.a).sub.1-x (Al.sub.1-b M.sub.b).sub.x ].sub.100-y B.sub.y where M is a substituent metal for nickel; a has a value between 0.0 and 0.30; M is a substituent for aluminum; b has a value between 0.0 and 0.10; x has a value between 0.23 and 0.25; and y has a value between 0.2 and 1.50, atomizing the melt to rapidly solidify the melt to powder particles having Ll 1 type crystal structure, forming a consolidated body of said particles to retain the Ll 2 type crystal structure, and cold working the body to deform it by more than 5%.
Claim 2
Independent Claim
126 words
A method of improving the room temperature properties of a tri-nickel aluminide base composition which comprises preparing a melt of a boron doped tri-nickel aluminide according to the expression [(Ni.sub.1-a M.sub.a).sub.1-x (Al.sub.1-b M.sub.b).sub.x ].sub.100-y B.sub.y where M is a substituent metal for nickel; a has a value between 0.0 and 0.30; M is a substituent for aluminum; b has a value between 0.0 and 0.10; x has a value between 0.23 and 0.25; and y has a value between 0.2 and 1.50, atomizing the melt to rapidly solidify the melt to powder particles having Ll 1 type crystal structure, forming a consolidated body of said particles to retain the Ll 2 type crystal structure, and cold working the body to deform it by more than 5%.
Claim 3
Dependent Claim
12 words
The method of claim 1 in which the substituent M is cobalt.
Claim 4
Dependent Claim
27 words
The method of claim 1 in which the substituent M is at least one metal selected from the group consisting of silicon, vanadium, tantalum, titanium, and niobium.
Claim 5
Dependent Claim
17 words
The method of claim 1 in which the value of a is between about 0.05 and 0.15.
Claim 6
Dependent Claim
15 words
The method of claim 1 in which b has a value between 0.01 and 0.07.
Claim 7
Dependent Claim
15 words
The method of claim 1 in which x has a value between 0.235 and 0.245.
Claim 8
Dependent Claim
16 words
The method of claim 1 in which the value of y is between 0.2 and 1.0.
Claim 9
Dependent Claim
17 words
The method of claim 1 in which the formation of the consolidated body is by spray forming.
Claim 10
Dependent Claim
18 words
The method of claim 1 in which the formation of the consolidated body is by hot isostatic pressing.
Claim 11
Dependent Claim
17 words
The method of claim 1 in which the deformation of the body is in excess of 10%.
Claim 12
Dependent Claim
15 words
The method of claim 1 in which the deformation of the body is about 25%.
References Cited (Backward Citations)
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Cited
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US3922168A
Cited
US4379720A
Cited
US4478791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |