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Effect of a hydrogen environment on the creep properties of polycrystalline vanadium metals

Author
Franklin, D. J
Published
United States : [publisher not identified], 1976.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1976.
Physical Description
microfiche : negative ; 11 x 15 cm

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Summary
An investigation was conducted to characterize the creep behavior of pure polycrystalline vanadium tested in a dynamic vacuum environment and to define any variation from its vacuum creep behavior brought about by exposure to hydrogen during creep. It was found that vanadium stops creeping immediately when hydrogen gas is admitted to the test chamber, at least under certain conditions. After 50 to 150 hours have elapsed, vanadium assumes a creep rate which is somewhat less than the original very high vacuum (VHV) creep rate observed before the hydrogen was admitted. If the hydrogen gas is removed, a creep rate approximately equal to the VHV creep rate will be observed after steady creep is reestablished. The creep interaction modes discussed fail to explain the cessation of creep in vanadium with the exception of the hydrogen-vacancy interaction mechanism. The details of the possible hydrogen-vacancy interaction mechanism proposed are not understood.
Report Numbers
IS-T-722
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: W-7405-ENG-82
OSTI Identifier 7332901
Research organization: Ames Lab., Ames, IA (United States).
View MARC record | catkey: 45376991