Swelling and tensile properties of EBR-II-irradiated tantalum alloys for space reactor applications
Conference
·
OSTI ID:5740504
The tantalum alloys T-111, ASTAR-811C, Ta-10 W, and unalloyed tantalum were examined following EBR-II irradiation to a fluence of 1.7 x 10/sup 26/ neutrons/m/sup 2/ (E > 0.1 MeV) at temperatures from 650 to 950 K. Swelling was found to be negligible for all alloys; only tantalum was found to exhibit swelling, 0.36%. Tensile testing revealed that irradiated T-111 and Ta-10 W are susceptible to plastic instability, but ASTAR-811C and tantalum were not. The tensile properties of ASTAR-811C appeared adequate for current SP-100 space nuclear reactor designs. Irradiated, oxygen-doped T-111 exhibited no plastic deformation, and the abrupt failure was intergranular in nature. The absence of plastic instability in ASTAR-811C is encouraging for alloys containing carbide precipitates. These fine precipitates might prevent dislocation channeling, which leads to plastic instability in many bcc metals after irradiation. 10 refs., 13 figs., 8 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5740504
- Report Number(s):
- CONF-850103-10; ON: DE85012887
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
42 ENGINEERING
420500 -- Engineering-- Materials Testing
ALLOY-TA-10V
ALLOYS
ASTAR 811C
CARBON ADDITIONS
CHEMICAL COMPOSITION
DATA
DEFORMATION
DESIGN
ELEMENTS
EXPERIMENTAL DATA
HAFNIUM ADDITIONS
HAFNIUM ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH TEMPERATURE
INFORMATION
IRRADIATION
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
METALS
MOBILE REACTORS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
NIOBIUM ADDITIONS
NIOBIUM ALLOYS
NUMERICAL DATA
PHYSICAL RADIATION EFFECTS
PLASTICITY
POWER REACTORS
RADIATION EFFECTS
REACTORS
REFRACTORIES
SPACE POWER REACTORS
SWELLING
TANTALUM
TANTALUM ALLOY-T111
TANTALUM ALLOYS
TANTALUM BASE ALLOYS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TESTING
TRANSITION ELEMENTS
TUNGSTEN ALLOYS
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
42 ENGINEERING
420500 -- Engineering-- Materials Testing
ALLOY-TA-10V
ALLOYS
ASTAR 811C
CARBON ADDITIONS
CHEMICAL COMPOSITION
DATA
DEFORMATION
DESIGN
ELEMENTS
EXPERIMENTAL DATA
HAFNIUM ADDITIONS
HAFNIUM ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH TEMPERATURE
INFORMATION
IRRADIATION
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
METALS
MOBILE REACTORS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
NIOBIUM ADDITIONS
NIOBIUM ALLOYS
NUMERICAL DATA
PHYSICAL RADIATION EFFECTS
PLASTICITY
POWER REACTORS
RADIATION EFFECTS
REACTORS
REFRACTORIES
SPACE POWER REACTORS
SWELLING
TANTALUM
TANTALUM ALLOY-T111
TANTALUM ALLOYS
TANTALUM BASE ALLOYS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TESTING
TRANSITION ELEMENTS
TUNGSTEN ALLOYS