Heat Treatment Effect on Fracture Toughness of F82H Irradiated in HFIR

Journal Article · Sat Jan 01 04:00:00 EST 2011 · Journal of Nuclear Materials

OSTI ID:1031013

Stoller, Roger E ^[1]; Sokolov, Mikhail A ^[1]; Tanigawa, Hiroyasu ^[1]; Hirose, Takanori ^[2]; Odette, G. R. ^[3]; Okubo, N. ^[2]; Jitsukawa, Shiro ^[2]; Sawai, T. ^[2]

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1. ORNL
2. Japan Atomic Energy Agency (JAEA)
3. University of California, Santa Barbara

Irradiation hardening and fracture toughness of reduced-activation ferritic/martensitic steel F82H after irradiation were investigated with a focus on changing the fracture toughness transition temperature as a result of several heat treatments. The specimens were standard F82H-IEA (IEA), F82H-IEA with several heat treatments (Mod1 series) and a heat of F82H (Mod3) containing 0.1 % tantalum. The specimens were irradiated up to 20 dpa at 300oC in the High Flux Isotope Reactor under a collaborative research program between JAEA/US-DOE. The results of hardness tests showed that irradiation hardening of IEA was comparable with that of Mod3. However, the fracture toughness-transition temperature of Mod3 was lower than that of IEA. The transition temperature of Mod1 was also lower than that of the IEA heat. These results suggest that optimization of specifications on the heat treatment condition and modification of the minor alloying elements seem to be effective to reduce the fracture toughness-transition temperature after irradiation.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1031013
• Journal Information: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: 1-3 Vol. 417; ISSN 0022-3115; ISSN JNUMAM
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FRACTURE PROPERTIES
FRACTURES
HARDENING
HARDNESS
HEAT TREATMENTS
HFIR REACTOR
IRRADIATION
MODIFICATIONS
OPTIMIZATION
RESEARCH PROGRAMS
SPECIFICATIONS
STEELS
TANTALUM
TRANSITION TEMPERATURE