A Theory of Hardening in Concentrated Alkali Halide Solid Solutions

概要

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The activation energy to move a dislocation through randomly distributed solute ions was calculated as a function of applied stress, solute ion concentration and line tension of the dislocation, by using a statistical method. The interaction between a dislocation and solute ions is calculated on the basis of elasticity theory (size misfit). Critical resolved shear stress, activation volume and dislocation velocity-stress exponent were determined as a function of temperature and concentration, by assuming that the thermally activated deformation is expressed by the Arrhenius equation. The theoretical results were compared with experimental data of KC1-KBr solid solution measured from 4.2 K to 293 K and close agreement was obtained, except for a range of low concentrations at low temperatures.
社団法人応用物理学会の論文
1979-01-05