Influence of Dislocation Loops on an Axial Shadow Pattern
M. O. Ivanov, L. B. Kvashnina, A. Yu. Naumuk
G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
Received: 29.04.2015. Download: PDF
The axial shadow pattern in a crystal containing prismatic and sliding dislocation loops is investigated within the scope of the classical scattering theory. The case, when the characteristic size of distortions’ correlation in a crystal is much more than distance of shadow-picture formation, is considered. The value of a minimal output of the particles, which are scattered by the distorted chain of atoms at not too large deformations, is proportional to the concentration of defects. In addition, it is a function of the angles determining an orientation of direction of a shadow-picture observation relative to a normal to the plane of dislocation loop as well as to a Burgers vector. Therefore, angular dependences for prismatic and sliding loops differ from each other substantially. That allows using a shadow effect for diagnostics of dislocation loops in crystals.
Key words: orientation effects, shadow picture, minimal egress, prismatic and sliding dislocation loops.
PACS: 61.05.cc, 61.05.fd, 61.05.jd, 61.72.Bb, 61.72.Dd, 61.72.Lk
Citation: M. O. Ivanov, L. B. Kvashnina, and A. Yu. Naumuk, Influence of Dislocation Loops on an Axial Shadow Pattern, Metallofiz. Noveishie Tekhnol., 37, No. 8: 1001—1015 (2015) (in Russian)