Philosophical magazine · 1958 · 114 citations · 7 references
Natural SciencesMaterials SciencePhysicsMechanical Behavior Of MaterialsSolid MechanicsSolid State PhysicsDeformation MechanismsDislocation MechanicsDislocation TheoryElastic DeformationPlastic DeformationStrength Of MaterialsBulk ModulusDislocation DensityDislocation Density EvolutionDislocation PhysicsElastic Dislocation TheoryPressure DependenceScrew DislocationsShear Modulus
Abstract Zener's theory of the volume expansion of self-strained elastic bodies is applied to screw and edge dislocations in isotropic media. The important physical parameters entering are the pressure dependence of the shear modulus, and, to a lesser extent, that of the bulk modulus. Numerical results for a number of materials are given. The volume expansion per atomic length of a dislocation line is found to be of the order of magnitude of one to two atomic volumes, thus confirming an earlier estimate by Stehle and Seeger.
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