Swelling and tensile properties of EBR-II-irradiated tantalum alloys for space reactor applications
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
- Resource Relation:
- Conference: 2. symposium on space nuclear power systems, Albuquerque, NM, USA, 14 Jan 1985
- Country of Publication:
- United States
- Language:
- English
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42 ENGINEERING
ALLOY-TA-10V
PHYSICAL RADIATION EFFECTS
PLASTICITY
SWELLING
TENSILE PROPERTIES
ASTAR 811C
TANTALUM
TANTALUM ALLOY-T111
CHEMICAL COMPOSITION
DEFORMATION
DESIGN
EXPERIMENTAL DATA
HIGH TEMPERATURE
IRRADIATION
MATERIALS TESTING
REFRACTORIES
SPACE POWER REACTORS
TEMPERATURE DEPENDENCE
ALLOYS
CARBON ADDITIONS
DATA
ELEMENTS
HAFNIUM ADDITIONS
HAFNIUM ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INFORMATION
MATERIALS
MECHANICAL PROPERTIES
METALS
MOBILE REACTORS
NIOBIUM ADDITIONS
NIOBIUM ALLOYS
NUMERICAL DATA
POWER REACTORS
RADIATION EFFECTS
REACTORS
TANTALUM ALLOYS
TANTALUM BASE ALLOYS
TESTING
TRANSITION ELEMENTS
TUNGSTEN ALLOYS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
360206* - Ceramics
Cermets
& Refractories- Radiation Effects
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties
420500 - Engineering- Materials Testing