Actions for ELASTIC CONSTANTS OF LITHIUM-MAGNESIUM ALLOYS. Technical Report No. 13 on SOLID STATE PHYSICS PROGRAM

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ELASTIC CONSTANTS OF LITHIUM-MAGNESIUM ALLOYS. Technical Report No. 13 on SOLID STATE PHYSICS PROGRAM

Author
Trivisonno, J.
Published
United States : [publisher not identified], 1961.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1961.
Physical Description
microopaque : positive ; 8 x 13 cm

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Summary
The single-crystal elastic constants of dilute lithium-magnesium alloys were measured using the ultrasonic pulse-echo technique. In terms of dln C/dx, all fundamental elastic constants increase with composition by the following amounts: C/sub 44/, 1.22; C', 1.03; B/sub s/, 1.2; per atom fraction. Small corrections for lattice parameter change upon alloying were made for C/sub 44/ and C' by using the pressure derivatives of the elastic constants of pure lithium and the known variation of the lattice constunt with composition. The re maining effect is ascribed to alloying. Both to understand the elastic shear constants of lithium and to comprehend their dependence on composition, small negative stiffness contributions arising in the Fermi energy must be included, in addition to the major and usual electrostatic stiffness. It is then possible to deduce the variation with composition of each contribution from the measured total variation for the two shear constants, with the result that din C/sub E//dx = 1.24 and dln C/sub F//dx = 1.76. Both values are reasonable. (auth)
Report Numbers
TID-13032
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: AT(11-1)-623
NSA number: NSA-15-023974
OSTI Identifier 4037109
Research organization: Case Inst. of Tech., Cleveland.
View MARC record | catkey: 42249240