Effects of hydrogen and deuterium on the temperature dependence of the shear constants C' of vanadium single crystals
Journal Article
·
· Acta Metall.; (United States)
An experimental study is carried out to determine whether or not a significant Snoek relaxation occurs in vanadium-hydrogen and -deuterium systems. Elastic shear constants, C/sup '/ = 1/2 (C/sub 11/-C/sub 12/) of V, V-H and V-D alloys are measured over the temperature range from 298 to 450 K by using an ultrasonic method. The change in C/sup '/ on allowing ..delta..C/sup '/, is found to be proportional to the inverse of temperature, indicating the occurrence of the Snoek-type relaxation due to rearrangements of H and D interstitials. The quantity vertical bar A - B vertical bar, a measure of tetragonality of the displacement field around H and D expressed in terms of the force-dipole tensor components, is evaluated from the slope of ..delta..C/sup '/ vs 1/T curves as 0.67 eV for V-H and 0.53 eV for V-D, respectively. These values of vertical bar A - B vertical bar are large by more than one order of magnitude as compared to those in Nb and Ta, in which no Snoek effect is so far observed.
- Research Organization:
- Dept. of Physics, Science Univ. of Tokyo
- OSTI ID:
- 5683389
- Journal Information:
- Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 35:4; ISSN AMETA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ACOUSTIC TESTING
ALLOYS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
CRYSTALS
DEUTERIUM
ELEMENTS
HIGH TEMPERATURE
HYDROGEN
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS TESTING
MEDIUM TEMPERATURE
METALLURGICAL EFFECTS
METALS
MONOCRYSTALS
NIOBIUM
NONDESTRUCTIVE TESTING
NONMETALS
NUCLEI
ODD-ODD NUCLEI
RELAXATION
SHEAR
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
TANTALUM
TESTING
TETRAGONAL LATTICES
TRANSITION ELEMENTS
ULTRASONIC TESTING
VANADIUM ALLOYS
360102* -- Metals & Alloys-- Structure & Phase Studies
ACOUSTIC TESTING
ALLOYS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
CRYSTALS
DEUTERIUM
ELEMENTS
HIGH TEMPERATURE
HYDROGEN
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS TESTING
MEDIUM TEMPERATURE
METALLURGICAL EFFECTS
METALS
MONOCRYSTALS
NIOBIUM
NONDESTRUCTIVE TESTING
NONMETALS
NUCLEI
ODD-ODD NUCLEI
RELAXATION
SHEAR
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
TANTALUM
TESTING
TETRAGONAL LATTICES
TRANSITION ELEMENTS
ULTRASONIC TESTING
VANADIUM ALLOYS