Temperature dependence of swelling in Type 316 stainless steel irradiated in HFIR (High Flux Isotope Reactor)
The temperature dependence of swelling was investigated in solution-annealed (SA) and 20% cold-worked (CW) type 316 stainless steel irradiated to 30 dpa at 300 to 600/sup 0/C in the High Flux Isotope Reactor (HFIR). At irradiation temperatures less than or equal to 400/sup 0/C, a high concentration (2 to 4 x 10/sup 23/ m/sup -3/) of small bubbles (1.5 to 4.5 nm diam) formed uniformly in the matrix. Swelling was low (<0.2%) in both SA and CW materials irradiated to 30 dpa. In the SA 316, cavity size increased but the number density decreased with increasing irradiation temperature above 500/sup 0/C. At 500/sup 0/C, there was a mixture of bubbles and voids, but at 600/sup 0/C, most of the cavities were voids. Maximum swelling (approx.5%) occurred at 500/sup 0/C. By contrast, cavities in 20% CW specimens were much smaller, with diameters of 6 and 9 nm at 500 and 600/sup 0/C, respectively, suggesting that they were primarily bubbles. The cavity number density in the CW 316 at both 500 and 600/sup 0/C (approx.1 x 10/sup 22/ m/sup -3/) was about one order of magnitude less than at 400/sup 0/C. Swelling increased slightly as irradiation temperature increased, peaking at 600/sup 0/C (0.3%). These results indicate that SA 316 swells more than CW 316 at 500 and 600/sup 0/C, but both SA and CW 316 are resistant to void swelling in HFIR at 400/sup 0/C and below to 30 dpa. 15 refs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Japan Atomic Energy Research Inst., Tokai, Ibaraki
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5997346
- Report Number(s):
- CONF-871036-11; ON: DE88000387
- Country of Publication:
- United States
- Language:
- English
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ALLOYS
BARYONS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELECTRON MICROSCOPY
ELEMENTARY PARTICLES
ELEMENTS
ENRICHED URANIUM REACTORS
FERMIONS
FLUIDS
GASES
HADRONS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HELIUM
HFIR REACTOR
IRON ALLOYS
IRON BASE ALLOYS
IRRADIATION
IRRADIATION REACTORS
ISOTOPE PRODUCTION REACTORS
LINE DEFECTS
MATERIALS
MECHANICAL STRUCTURES
MICROSCOPY
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NEUTRONS
NICKEL ALLOYS
NONMETALS
NUCLEONS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RARE GASES
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SPECTRA
STAINLESS STEEL-316
STAINLESS STEELS
STEELS
SWELLING
TANK TYPE REACTORS
TEMPERATURE DEPENDENCE
TEST REACTORS
THERMAL NEUTRONS
THERMAL REACTORS
THERMONUCLEAR DEVICES
TRANSMISSION ELECTRON MICROSCOPY
WATER COOLED REACTORS
WATER MODERATED REACTORS
X-RAY SPECTRA