Thermoelastic stresses and their relaxation at alkali-halide single crystals hardening

  • 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, Kharkiv, Ukraine
  • I. N. Pakhomova V. Karazin Kharkov National University, 4 Svobody sq., 61022, Kharkiv, Ukraine
Keywords: hardening, thermoelastic stress, dislocation, fragmentation, photoelasticity

Abstract

The origin of internal stresses during hardening of alkali-halide single crystals was investigated. It is shown that the thremoelastic stress relaxation is accompanied by the fragmentation of distinct areas of a single crystal and by the development of new dislocations, which formed a cellular structure. The internal stress distribution is qualitatively analyzed by the photoelasticity method.

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References

Frocht, M.M., Photoelasticity. J. Wiley and Sons, London, 1965.

P. D. Pathak, J. M. Trivedi, N. G. Vasavada, Thermal expansion of NaF, KBr and RbBr and temperature variation of the frequency spectrum of NaF, Acta Cryst. (1973). A29, 477-479.

Sadd M.H. Elasticity. Theory, Applications, and Numerics. Elsevier. 2005, 473 p.

Boley B. A., Weiner J. H. Theory of Thermal Stresses, 1960 (John Wiley, London).
Published
2017-09-22
How to Cite
Kovtun, O. I., Matsokin, D. V., & Pakhomova, I. N. (2017). Thermoelastic stresses and their relaxation at alkali-halide single crystals hardening. Journal of V. N. Karazin Kharkiv National University. Series Physics, (26), 44-47. Retrieved from https://periodicals.karazin.ua/physics/article/view/10087
Issue
No. 26 (2017): Journal of V.N. Karazin Kharkiv National University, series "Physics"
Section
Articles