Isotopic tailoring with {sup 59}Ni to study the effect of helium on microstructural evolution and mechanical properties of neutron-irradiated Fe-Cr-Ni alloys
- Pacific Northwest Lab., Richland, WA (United States)
- Illinois Univ., Urbana, IL (United States)
- Rockwell International Corp., Canoga Park, CA (United States)
Tensile testing on three model Fe-Cr-Ni alloys removed from four discharges of the {sub 59}Ni isotopic doping experiment in FFTF-MOTA indicates that helium/dpa ratios typical of fusion reactors do not produce changes in the yield strength or elongation that are significantly different from those at much lower helium generation rates. It also appears that tensile properties approach a saturation level that is dependent only on the final irradiation temperature, but not prior temperature history or thermomechanical starting condition. The saturation in mechanical properties reflects a similar saturation in microstructure that is independent of starting condition. The successful conduct of an isotopic doping experiment was found to require post-irradiation measurement of the helium levels in order to compensate for uncertainties in the cross sections for burn-out and burn-in of {sub 59}Ni and for uncertainties in neutron flux and spectra in the vicinity of the edge of the core.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 10170444
- Report Number(s):
- PNL-SA-19945; CONF-920673-10; ON: DE92019372
- 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; Other Information: PBD: Mar 1992
- Country of Publication:
- United States
- Language:
- English
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36 MATERIALS SCIENCE
THERMONUCLEAR REACTOR MATERIALS
PHYSICAL RADIATION EFFECTS
AUSTENITIC STEELS
HELIUM EMBRITTLEMENT
NICKEL 59
MICROSTRUCTURE
MECHANICAL PROPERTIES
DAMAGING NEUTRON FLUENCE
IRON BASE ALLOYS
YIELD STRENGTH
SWELLING
TENSILE PROPERTIES
CHROMIUM ALLOYS
NICKEL ALLOYS
700480
360106
360103
COMPONENT DEVELOPMENT
MATERIALS STUDIES
RADIATION EFFECTS