Debye screening of dislocations
1Department of General Physics, Eötvös University, 1117 Budapest, Pázmány sétány 1/a, Hungary. groma@metal.elte.hu
Abstract:
Debye-like screening by edge dislocations of some externally given stress is studied by means of a variational approach to coarse grained field theory. Explicitly given are the force field and the induced geometrically necessary dislocation (GND) distribution, in the special case of a single glide axis in 2D, for (i) a single edge dislocation and (ii) a dislocation wall. Numerical simulation demonstrates that the correlation in relaxed dislocation configurations is in good agreement with the induced GND in case (i). Furthermore, the result (ii) well predicts the experimentally observed decay length for the GND developing close to grain boundaries.
Related Concept Videos
Debye–Huckel–Onsager Conductance Equation
Imperfections in Crystal Structure: Point, Line and Plane Defects
Determination of Crystal Structures
Imperfections in Crystal Structure: Stoichiometric Point Defects
X-ray Crystallography
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Temperature Dependent Deformation


