Influence of composition on the microstructural evolution and mechanical properties of irradiated Fe-Ni-Cr ternaries. Draft
Five simple Fe-Ni-Cr ternary alloys in the Invar compositional region were irradiated as tensile specimens in EBR-II at 395, 450 and 550/sup 0/C to 10.5 to 12.5 dpa. The density changes were measured by an immersion density technique. Specimens irradiated at 450/sup 0/C were examined by electron microscopy and identical specimens were tensile tested at 450/sup 0/C. Swelling exhibited a dependence on nickel and chromium content that was consistent with the results of earlier studies. The compositional dependence of swelling arises primarily from the dependence on nickel of both vacancy diffusivity and radiation-induced phase decomposition. There is also a small dependence of Frank loop and dislocation evolution on composition. Although there was excellent agreement between the measured strength and a prediction based on observed microstructure for an alloy containing 25% nickel, an increasing disparity developed between the two for alloys with higher nickel levels. This disparity is thought to be related to the hardening associated with the spinodal-like decomposition of the alloy matrix.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76FF02170
- OSTI ID:
- 6014895
- Report Number(s):
- HEDL-SA-3175-FP; CONF-841246-22; ON: DE85007462
- Country of Publication:
- United States
- Language:
- English
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ALLOYS
BARYON REACTIONS
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
HADRON REACTIONS
HIGH TEMPERATURE
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NEUTRON REACTIONS
NICKEL ALLOYS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
SWELLING
TENSILE PROPERTIES