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

Conference · Sun Mar 01 00:00:00 EST 1992

OSTI ID:7181887

Garner, F A; Hamilton, M L; Greenwood, L R ^[1]; Stubbins, J F ^[2]; Oliver, B M ^[3]

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1. Pacific Northwest Lab., Richland, WA (United States)
2. Illinois Univ., Urbana, IL (United States)
3. 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; USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 7181887
• 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), Denver, CO (United States), 21-22 Jun 1992
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Ma
36 MATERIALS SCIENCE
AUSTENITIC STEELS
HELIUM EMBRITTLEMENT
THERMONUCLEAR REACTOR MATERIALS
PHYSICAL RADIATION EFFECTS
CHROMIUM ALLOYS
DAMAGING NEUTRON FLUENCE
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL 59
NICKEL ALLOYS
SWELLING
TENSILE PROPERTIES
YIELD STRENGTH
ALLOYS
BETA DECAY RADIOISOTOPES
CRYSTAL STRUCTURE
ELECTRON CAPTURE RADIOISOTOPES
EMBRITTLEMENT
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
IRON ALLOYS
ISOTOPES
MATERIALS
NEUTRON FLUENCE
NICKEL ISOTOPES
NUCLEI
RADIATION EFFECTS
RADIOISOTOPES
STEELS
YEARS LIVING RADIOISOTOPES
700480* - Fusion Technology- Component Development
Materials Studies- (1992-)
360106 - Metals & Alloys- Radiation Effects
360103 - Metals & Alloys- Mechanical Properties