The lattice strains in a specimen (cubic system) compressed13; nonhydrostatically in an opposed anvil device

Singh, AK (1993) The lattice strains in a specimen (cubic system) compressed13; nonhydrostatically in an opposed anvil device. Journal of Applied Physics, 73. pp. 4278-4286.

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Abstract

A general expression has been derived using anisotropic elasticity theory for the lattice strain which corresponds to the x-ray diffraction measurement on the poly crystalline specimen (cubic system) compressed non- hydro statically in an opposed anvil device . The expressions for the various diffraction geometries emerge as the special cases of this equation . The strain calculated13; using isotropic elasticity theory corresponds to the macroscopic strain in the specimen, and cart be obtained from the present equation by letting the anisotropy factor 2(S1 1-S12)/S44 =1 .Further, it is shown that the ratio of the lattice strain to the macroscopic strain (in the direction of the lattice strain) produced by the deviatoric stress component depends on the Miller indices13; (hkl) of the lattice planes and the elastic anisotropy factor . This ratio is unity only if the crystallites constituting the specimen are elastically isotropic, and increases with increasing anisotropy of the crystallites.

Item Type: Article
Uncontrolled Keywords: Lattice strains;Cubic system;Anvil device
Subjects: PHYSICS > Solid-State Physics
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Users 60 not found.
Date Deposited: 20 Aug 2008
Last Modified: 24 May 2010 04:15
URI: http://nal-ir.nal.res.in/id/eprint/1964

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