US4586969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fe-Ni-Ti-Co alloy with shape memory effect and pseudo-elasticity and method of producing the same
Assignee: Kyoto University
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Filing: 1985-03-14
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Granted: 1986-05-06
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Expires: 2005-03-14
Abstract
Abstract The disclosed alloy with a shape memory effect and a pseudo-elasticity exhibits a thin-plate martensitic structure, which alloy is made by heating an alloy consisting of 32-34 wt. % of nickel, 3-6 wt. % of titanium, 10-15 wt. % of cobalt and the remainder of Fe to a temperature between 900° C. to 1,200° C. and effecting an aging treatment at a temperature between 500° C. and 800° C. so as to generate a thin-plate martensite.
Inventors
- 👤 Imao Tamura
- 👤 Tadashi Maki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:36
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/10; C22C38/105; C22F; C22F1/00; C22F1/006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
40 words
An Fe--Ni--Ti--Co alloy with a shape memory effect and a pseudo-elasticity consists of 32-34 wt. % of nickel, 3-6 wt. % of titanium, 10-15 wt. % of cobalt and the remainder of Fe, said alloy having a thin-plate martensitic structure.
Claim 2
Dependent Claim
40 words
An Fe--Ni--Ti--Co alloy with a shape memory effect and a pseudo-elasticity consists of 32-34 wt. % of nickel, 3-6 wt. % of titanium, 10-15 wt. % of cobalt and the remainder of Fe, said alloy having a thin-plate martensitic structure.
Claim 3
Independent Claim
88 words
A method of producing an Fe--Ni--Ti--Co alloy, comprising steps of heating an alloy consisting of 32-34 wt. % of nickel, 3-6 wt. % of titanium, 10-15 wt. % of cobalt and the remainder of Fe to a temperature between 900° C. and 1,200° C. so as to effect a homogeneous solution treatment; and effecting an aging treatment at a temperature between 500° C. and 800° C. for less than 100 hours so as to generate a thin-plate martensite corresponding to a cooling operating or a stress applying operation.
Claim 4
Independent Claim
88 words
A method of producing an Fe--Ni--Ti--Co alloy, comprising steps of heating an alloy consisting of 32-34 wt. % of nickel, 3-6 wt. % of titanium, 10-15 wt. % of cobalt and the remainder of Fe to a temperature between 900° C. and 1,200° C. so as to effect a homogeneous solution treatment; and effecting an aging treatment at a temperature between 500° C. and 800° C. for less than 100 hours so as to generate a thin-plate martensite corresponding to a cooling operating or a stress applying operation.
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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |