Microstructural examination of several commercial ferritic alloys irradiated to high fluence
Microstructural observations are reported for a series of five commercial ferritic alloys, 2 1/4 Cr-1 Mo, H-11, EM-12, 416, and 430F, covering the composition range 2.25 to 17% chromium, following EBR-II irradiation over the temperature range 400 to 650/sup 0/C and to a maximum fluence of 17.6 x 10/sup 22/ n/cm/sup 2/ (E > 0.1 MeV). These materials were confirmed to be low void swelling with maximum swelling of 0.63% measured in EM-12 following irradiation at 400/sup 0/C to 14.0 x 10/sup 22/ n/cm/sup 2/. A wide range of precipitation response was found both as a function of alloy and irradiation temperature. Precipitates observed included M/sub 6/C, Mo/sub 2/C, Chi, Laves, M/sub 23/C/sub 6/, ..cap alpha..' and a low temperature phase as yet unidentified. It is predicted, based on these results, that the major impact of irradiation on the ferritic alloy class will be changes in postirradiation mechanical properties due to precipitation.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- AC14-76FF02170
- OSTI ID:
- 6233512
- Report Number(s):
- HEDL-SA-2338-FP; CONF-810831-45; ON: DE81029800
- Country of Publication:
- United States
- Language:
- English
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ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
HIGH TEMPERATURE
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
STAINLESS STEELS
STEELS