On the ductile-to-brittle transition behavior of martensitic alloys neutron irradiated to 26 dpa
Conference
·
OSTI ID:6650562
Charpy impact tests were conducted on specimens made of HT-9 and 9Cr-1Mo in various heat treatment conditions which were irradiated in EBR-II to 26 dpa at 390 to 500/sup 0/C. The results are compared with previous results on specimens irradiated to 13 dpa. HT-9 base metal irradiated at low temperatures showed a small additional increase in ductile brittle transition temperature and a decrease in upper shelf energy from 13 to 26 dpa. No fluence effect was observed in 9Cr-1Mo base metal. The 9Cr-1Mo weldment showed degraded DBTT but improved USE response compared to base metal, contrary to previous findings on HT-9. Significant differences were observed in HT-9 base metal between mill annealed material and normalized and tempered material. The highest DBTT for HT-9 alloys was 50/sup 0/C higher than for the worst case in 9Cr-1Mo alloys. Fractography and hardness measurements were also obtained. Significant differences in fracture appearance were observed in different product forms, although no dependence on fluence was observed. Failure was controlled by the preirradiation microstructure.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76FF02170
- OSTI ID:
- 6650562
- Report Number(s):
- HEDL-SA-3535-FP; CONF-860605-42; ON: DE87005476
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOY-HT-9
ALLOYS
BARYON REACTIONS
BREEDER REACTORS
CHARPY TEST
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
DESTRUCTIVE TESTING
DUCTILE-BRITTLE TRANSITIONS
EBR-2 REACTOR
EPITHERMAL REACTORS
EXPERIMENTAL REACTORS
FAILURES
FAST REACTORS
FBR TYPE REACTORS
HADRON REACTIONS
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
MATERIALS TESTING
MECHANICAL TESTS
MOLYBDENUM ALLOYS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
POWER REACTORS
REACTORS
RESEARCH AND TEST REACTORS
SODIUM COOLED REACTORS
STEELS
TESTING
360103* -- Metals & Alloys-- Mechanical Properties
ALLOY-HT-9
ALLOYS
BARYON REACTIONS
BREEDER REACTORS
CHARPY TEST
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
DESTRUCTIVE TESTING
DUCTILE-BRITTLE TRANSITIONS
EBR-2 REACTOR
EPITHERMAL REACTORS
EXPERIMENTAL REACTORS
FAILURES
FAST REACTORS
FBR TYPE REACTORS
HADRON REACTIONS
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
MATERIALS TESTING
MECHANICAL TESTS
MOLYBDENUM ALLOYS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
POWER REACTORS
REACTORS
RESEARCH AND TEST REACTORS
SODIUM COOLED REACTORS
STEELS
TESTING