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Shift of Extinction Contours due to the Presence of Dislocations

✍ Scribed by R. Siems; P. Delavignette; S. Amelinckx

Publisher
John Wiley and Sons
Year
1963
Tongue
English
Weight
511 KB
Volume
3
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

The deformation of prisms and elliptical cylinders, resulting from the presence of an arbitrary dislocation line parallel to one of the main axes of the cross‐sections is discussed. It is shown that in general the specimen is both bent and twisted. The deformation appears in the electron microscope as a shift of the extinction contours where these cross the dislocations. The sign and magnitude of the shift depend on the magnitude, the sign and the orientation of the Burgers vector with respect to the dislocation line, as well as on the operating diffraction vector and local curvature of the foil.

For a particular dislocation in tin disulfide it has been possible to verify the theory in detail.

πŸ“œ SIMILAR VOLUMES

The buckling of a thin plate due to the
The buckling of a thin plate due to the presence of an edge dislocation
✍ R. Siems; P. Delavignette; S. Amelinckx πŸ“‚ Article πŸ“… 1962 πŸ› John Wiley and Sons 🌐 English βš– 971 KB

## Abstract It is shown that an edge dislocation parallel to the surface of a thin foil causes buckling of this foil by an angle of about ΞΈ = __b__/__t__. (__b__ = Burgers vector; __t__ = thickness of the foil). The angle ΞΈ depends on the position of the dislocation. It is maximum for a dislocation