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US4359350A
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High post-irradiation ductility thermomechanical treatment for precipitation strengthened austenitic alloys
Assignee: United States Department of Energy
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Filing: 1981-03-27
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Granted: 1982-11-16
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Expires: 2001-03-27
Abstract
Abstract A method for improving the post-irradiation ductility is described which comprises a solution heat treatment following which the materials are cold worked. They are included to demonstrate the beneficial effect of this treatment on the swelling resistance and the ductility of these austenitic precipitation hardenable alloys.
Inventors
- 👤 James J. Laidler
- 👤 Ronald R. Borisch
- 👤 Michael K. Korenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:27
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/10; C21; C21D; C21D8/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
The method of improving the post-irradiation ductility of precipitation hardenable alloys, the steps comprising solution heat treating the alloys at a temperature within the range between about 950° C. and about 1150° C. and thereafter cold working the alloys to effect a reduction in cross-sectional area of between about 10% and about 60%.
Claim 2
Independent Claim
53 words
The method of improving the post-irradiation ductility of precipitation hardenable alloys, the steps comprising solution heat treating the alloys at a temperature within the range between about 950° C. and about 1150° C. and thereafter cold working the alloys to effect a reduction in cross-sectional area of between about 10% and about 60%.
Claim 3
Dependent Claim
29 words
The method according to claim 1 which is characterized by cold working to effect a reduction in cross-sectional area of between about 15% and about 30% by cold rolling.
Claim 4
Dependent Claim
26 words
The method according to claim 1 which is characterized by cold working to effect a reduction in cross-sectional area of between about 20% and about 25%.
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) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |