Nickel-doped ferritic (martensitic) steels for fusion reactor irradiation studies: tempering behavior and unirradiated and irradiated tensile properties

Conference · Fri Jan 01 04:00:00 EST 1982 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:5836026

Klueh, R L; Vitek, J M; Grossbeck, M L

When an alloy containing nickel is irradiated in a mixed-spectrum reactor, helium is produced in the lattice by the transmutation of /sup 58/Ni by thermal neutrons. Nickel doping of two ferritic (martensitic) steels is being used to determine the effect of simultaneously produced helium and displacement damage (produced by the fast neutrons in the spectrum) on the mechanical properties of these steels, which are structural candidates for fusion reactor applicatioans. Heats of 9 Cr-1 MoVNb and 12 Cr-1 MoVW with up to 2% Ni have been prepared. Tempering studies were conducted to determine the effect of nickel on the basic alloys and to identify the appropriate tempering temperature and time. Tensile specimens of the steels were irradiated in the High Flux Isotope Reactor to displacement damage levels of up to 9.3 dpa and helium concentrations of up to 82 at. ppM. Tensile studies at room temperature and 300/sup 0/C on the 9 Cr-1 MoVNb steels indicated that the irradiation led to increased strength and decreased ductility compared to the steels in the unirradiated condition. It was concluded that the hardening resulted from the displacement damage and was not affected by the transmutation helium. Results were similar to tensile properties previously obtained for nickel-doped 12 Cr-1 MoVW steel irradiated under similar conditions. 13 figures.

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5836026
• Report Number(s): CONF-820628-
• Conference Information: Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Journal Volume: 782
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
ELEMENTS
ENRICHED URANIUM REACTORS
FERRITIC STEELS
FLUIDS
GASES
HARDNESS
HEAT TREATMENTS
HELIUM
HFIR REACTOR
IRON ALLOYS
IRON BASE ALLOYS
IRRADIATION REACTORS
ISOTOPE PRODUCTION REACTORS
MECHANICAL PROPERTIES
NICKEL ADDITIONS
NICKEL ALLOYS
NONMETALS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RARE GASES
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
STEELS
TANK TYPE REACTORS
TEMPERING
TENSILE PROPERTIES
TEST REACTORS
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS