Microstructure of HFIR-irradiated 12-Cr 1 MoVW ferritic steel

Conference · Sat Jan 01 00:00:00 EST 1983

OSTI ID:5581466

Vitek, J M; Klueh, R L

As part of the fusion materials development program in the United States, a 12 Cr-1 MoVW ferritic steel was irradiated in the High Flux Isotope Reactor (HFIR) to a damage level of 36 dpa at 300, 400, 500, and 600/sup 0/C. During irradiation in HFIR, a transmutation reaction of nickel results in the production of helium, to a level of 99 at. ppM in the present experiment. The microstructures were evaluated after irradiation and the results are presented. Cavities were found at all temperatures. Small cavities (3 to 9 nm) were observed after irradiation at 300, 500 and 600/sup 0/C. At 500 and 600/sup 0/C, the cavities were found preferentially at dislocations, lath boundaries, and prior austenite grain boundaries. After irradiation at 400/sup 0/C, larger cavities (4 to 30 nm) were observed homogeneously distributed throughout the tempered martensite structure. The maximum swelling was 0.07% after irradiation at 400/sup 0/C. Comparision of the results with other studies in which helium was not present at such high levels indicated helium enhances the swelling of 12 Cr-1 MoVW.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5581466
• Report Number(s): CONF-830659-15; ON: DE84003291
• Resource Relation: Conference: TMS/AIME topical conference on ferritic alloys for use in nuclear energy technologies, Snowbird, UT, USA, 19 Jun 1983
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM-MOLYBDENUM STEELS
PHYSICAL RADIATION EFFECTS
CAVITATION
HELIUM
HFIR REACTOR
HIGH TEMPERATURE
MICROSTRUCTURE
SWELLING
TUNGSTEN ADDITIONS
VANADIUM ADDITIONS
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CRYSTAL STRUCTURE
ELEMENTS
ENRICHED URANIUM REACTORS
FLUIDS
GASES
IRON ALLOYS
IRON BASE ALLOYS
IRRADIATION REACTORS
ISOTOPE PRODUCTION REACTORS
NONMETALS
RADIATION EFFECTS
RARE GASES
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
STEELS
TANK TYPE REACTORS
TEST REACTORS
THERMAL REACTORS
TUNGSTEN ALLOYS
VANADIUM ALLOYS
WATER COOLED REACTORS
WATER MODERATED REACTORS
360106* - Metals & Alloys- Radiation Effects