Charpy impact toughness of martensitic steels irradiated in FFTF: Effect of heat treatment
Charpy tests were made on plates of 9Cr-1MoVNb and 12Cr-1MoVW steels given four different normalizing-and-tempering treatments. One-third-size Charpy specimens from each steel were irradiated to 7.4-8 [times] 10[sup 26] n/m[sup 2] (about 34--37 dpa) at 420C in the Materials Open Test Assembly of the Fast Flux Test Facility. Specimens were also thermally aged to 20000 h at 400C to determine the effect of aging during irradiation. Previous work on these steels irradiated to 4--5 dpa at 365C in MOTA were reexamined in light of the new results. The tests indicated that prior austenite grain size, which was varied by different normalizing treatments, had an effect on impact behavior of the 9Cr-1MoVNb but not on the 12Cr-1MoVW. Tempering treatment had relatively little effect on the shift in DBTT for both steels. conclusions are presented on how heat treatment can be used to optimize properties.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7368585
- Report Number(s):
- CONF-920673-22; ON: DE93015960
- Resource Relation:
- Conference: 16. annual symposium of American Society of Testing and Materials (ASTM) on effects of radiation on materials, Denver, CO (United States), 21-25 Jun 1992
- Country of Publication:
- United States
- Language:
- English
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Charpy impact toughness of martensitic steels irradiated in FFTF: Effect of heat treatment
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Related Subjects
MARTENSITIC STEELS
MECHANICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
CHARPY TEST
CHROMIUM-MOLYBDENUM STEELS
DUCTILE-BRITTLE TRANSITIONS
FFTF REACTOR
MICROSTRUCTURE
ALLOYS
DESTRUCTIVE TESTING
EPITHERMAL REACTORS
FAST REACTORS
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
LIQUID METAL COOLED REACTORS
MATERIALS TESTING
MECHANICAL TESTS
RADIATION EFFECTS
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SODIUM COOLED REACTORS
STEELS
TEST REACTORS
TESTING
360106* - Metals & Alloys- Radiation Effects
360103 - Metals & Alloys- Mechanical Properties