The lattice strains in a specimen (cubic system) compressed nonhydrostatically in an opposed anvil device
作者： Anil K. Singh
DOI: 10.1063/1.352809
关键词: Condensed matter physics 、 Diffraction 、 Isotropy 、 Materials science 、 Crystallite 、 Lattice (order) 、 Elasticity (physics) 、 X-ray crystallography 、 Crystallography 、 Stress (mechanics) 、 Anisotropy
摘要: A general expression has been derived using anisotropic elasticity theory for the lattice strain which corresponds to x‐ray diffraction measurement on polycrystalline specimen (cubic system) compressed nonhydrostatically in an opposed anvil device. The expressions various geometries emerge as special cases of this equation. calculated isotropic macroscopic specimen, and can be obtained from present equation by letting anisotropy factor 2(S11−S12)/S44=1. Further, it is shown that ratio (in direction strain) produced deviatoric stress component depends Miller indices (hkl) planes elastic factor. This unity only if crystallites constituting are elastically isotropic, increases with increasing crystallites.
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