Reorientation in alkali-halide single crystals under mechanical stress in an initial stage of high-temperature creep

V. I. Kibets V. Karazin Kharkov National University, 4 Svobody sq., 61022, Kharkov, Ukraine
O. I. Kovtun Physikalisches Institut der Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany
D. V. Matsokin V. Karazin Kharkov National University, 4 Svobody sq., 61022, Kharkov, Ukraine
V. P. Matsokin V. Karazin Kharkov National University, 4 Svobody sq., 61022, Kharkov, Ukraine
I. N. Pakhomova V. Karazin Kharkov National University, 4 Svobody sq., 61022, Kharkov, Ukraine

Keywords: dislocation, rotational deformation, single crystal, polycrystal, reorientation band, kink band

Abstract

Structural changes in KCl and NaCl single crystals were investigated at the initial stage of the high-temperature creep during impeded motion of dislocation in easy-slip systems. The main features of the formation of dislocation structures were studied at the initial stage of rotational deformation, marked by the development of reorientation bands in single crystals. The subsequent process of rotational deformation was also analyzed, as the reorientation bands enlarge and merge and hence, single crystals become polycrystals.

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