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Combined effects of displacement damage and high gas content in aluminum [electronic resource]

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Bibliographic Details
Online Access: Online Access
Corporate Author: Oak Ridge National Laboratory (Researcher)
Format: Government Document Electronic eBook
Language:English
Published: Oak Ridge, Tenn. : Oak Ridge, Tenn. : Oak Ridge National Laboratory. ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1976.
Subjects:
Rare Gases.
Beta Decay Radioisotopes.
Lithium 6.
Voids.
Thermonuclear Reactor Materials.
Beta-minus Decay Radioisotopes.
Baryon Reactions.
Cryogenic Fluids.
Stable Isotopes.
Isotopes.
Tritium.
Hadron Reactions.
Neutron Reactions.
Fluids.
Elements.
Aluminium.
Nonmetals.
Nuclear Reactions.
Lithium Isotopes.
Odd-even Nuclei.
Alkali Metal Isotopes.
Metals.
Odd-odd Nuclei.
Irradiation.
Nucleon Reactions.
Neutron Flux.
Helium.
Hydrogen Isotopes.
Radiation Flux.
Light Nuclei.
Nuclei.
Years Living Radioisotopes.
Radioisotopes.
Plasma Physics And Fusion Technology.
Materials Science.
Description
Abstract:A solid solution alloy of 2300 appm of ⁶Li isotope in aluminum was neutron irradiated at about 0.36 T/sub m/ in high, fast and thermal fluxes producing a damage level of 2 to 3 dpa and simultaneously inducing a gas content of about 2200 appm each of helium and tritium from burnup of ⁶Li. The gases significantly increased the nucleation of structural defects but did not change the degree of swelling; cavity concentrations were increased approximately 1000-fold, cavity sizes were decreased approximately 10-fold and there was approximately 10-fold increase in the concentrations of dislocations. Also, large cavities were developed on grain boundaries. The cavities were consistent with their being gas-filled bubbles. The refinement of damage structure by the gases caused a considerable increase in radiation hardening. Bend tests at 77 and 296 K revealed severe embrittlement and intergranular fracture. Comparison with data from material irradiated to produce comparable gas levels but relatively little displacement damage indicates that premature intergranular failure is much enhanced by the presence of a defect-hardened matrix. Postirradiation annealing tests showed the cavity and dislocation structures to have high resistance to annealing. Annealing also encouraged the development of a secondary population of large cavities believed to be associated with migration and precipitation of tritium.
Item Description:Published through SciTech Connect.
05/01/1976.
"ornl/tm-5395"
Farrell, K.; Houston, J.T.
Physical Description:Pages: 28 : digital, PDF file.

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