Radiation effects in materials for fusion reactors
The 14-MeV neutrons produced in a fusion reactor result in different irradiation damage than the equivalent fluence in a fast breeder reactor, not only because of the higher defect generation rate, but because of the production of significant concentrations of helium and hydrogen. Although no fusion test reactor exists, the effects of combined displacement damage plus helium can be studied in mixed-spectrum fission reactors for alloys containing nickel (e.g., austenitic stainless steels). The presence of helium appears to modify vacancy and interstitial recombination such that microstructural development in alloys differs between the fusion and fission reactor environments. Since mechanical properties of alloys are related to the microstructure, the simultaneous production of helium and displacement damage impacts upon key design properties such as tensile, fatigue, creep, and crack growth. Through an understanding of the basic phenomena occurring during irradiation and the relationships between microstructure and properties, alloys can be tailored to minimize radiation-induced swelling and improve mechanical properties in fusion reactor service.
- Research Organization:
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5413953
- Journal Information:
- J. Vac. Sci. Technol.; (United States), Journal Name: J. Vac. Sci. Technol.; (United States) Vol. 20:4; ISSN JVSTA
- Country of Publication:
- United States
- Language:
- English
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ALLOYS
ALUMINIUM
BORON ADDITIONS
BORON ALLOYS
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CLOSED PLASMA DEVICES
CORROSION RESISTANT ALLOYS
CRACKS
CREEP
CRYSTAL STRUCTURE
DAMAGE
DAMAGING NEUTRON FLUENCE
DEFECTS
ELEMENTS
ENERGY RANGE
FATIGUE
FLUIDS
GASES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HELIUM
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
IRRADIATION
MATERIALS
MECHANICAL PROPERTIES
METALS
MEV RANGE
MEV RANGE 10-100
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NEUTRON FLUENCE
NEUTRON FLUX
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIMONIC
NIMONIC PE16
NIOBIUM
NONMETALS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIATION FLUX
RARE GASES
STAINLESS STEEL-316
STAINLESS STEELS
STEELS
SWELLING
TENSILE PROPERTIES
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTOR WALLS
THERMONUCLEAR REACTORS
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TOKAMAK DEVICES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VANADIUM ALLOYS
VANADIUM BASE ALLOYS
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS