Response of 9Cr Steel and 20Cr Fe-base ODS Alloy to High-energy Ne-ion Irradiation at Elevated Temperatures

Conference · Sat Jul 01 04:00:00 EDT 2006

OSTI ID:21021050

Chonghong, Zhang; Jang, Jinsung; Min-Chul, Kim ^[1]; Yin, Song ^[2]

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1. Korea Atomic Energy Research Institute, Daejeon, 305-353 (Korea, Republic of)
2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China)

Effects of energetic particle irradiation on ferritic/martensitic steels and Fe-base ODS alloys are of important concern for the use of materials as structural components in advanced nuclear power systems. In the present work an irradiation experiment of some ferritic/martensitic and ODS steels with high-energy Ne ions was carried out to study the effects of atomic displacement damage and nuclear transmutation gases like helium on the microstructures. Specimens of Grade 92 steel (a 9% Cr ferritic/martensitic steel) and MA956 (a Fe-base ODS alloy) were subjected to the irradiation of {sup 20}Ne ions (with 122 MeV) to successively increasing damage levels of 1, 5 and 10 dpa at the damage peak at 440 and 570 deg C respectively. Cross-section microstructures were investigated with transmission electron microscopy (TEM). MA956 alloy showed relatively higher resistance to Ne ion irradiation in all the irradiation conditions. The suppression of growth of voids especially at grain-boundaries in MA956 is ascribed to the enhanced recombination of point defects and the trapping of Ne at the interfaces of yttrium oxides as well as the low-angle coherent structure of the grain-boundaries in this material. (authors)

• Research Organization: American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
• OSTI ID: 21021050
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC DISPLACEMENTS
AUGMENTATION
DAMAGE
FERRITIC STEELS
GRAIN BOUNDARIES
GROWTH
HELIUM
IRRADIATION
MARTENSITIC STEELS
MEV RANGE
NEON 20
NEON IONS
NUCLEAR POWER
POINT DEFECTS
TEMPERATURE DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM OXIDES