https://www.elibrary.ru/title_about_new.asp?i Materials physics and mechanics Механика и физика материалов 1605-8119 9 10.18720/MPM.4262019_9 Axial misfit stress relaxation in core-shell nanowires with hexagonal core via nucleation of rectangular prismatic dislocation loops Axial misfit stress relaxation in core-shell nanowires with hexagonal core via nucleation of rectangular prismatic dislocation loops Krasnitckii S.A. Smirnov A.M. Mynbaev Zhigilei 0000-0003-0727-6352 Gutkin M. Yu. Peter the Great St. Petersburg Polytechnic University ITMO University Ioffe Institute University of Virginia Institute of Problems of Mechanical Engineering RAS 25 12 2019 42 6 776 783

A theoretical model of axial misfit stress relaxation in core-shell nanowires with hexagonal cross section of the core through the nucleation of prismatic dislocation loops is suggested. Different nucleation sites of the loops in core-shell nanowires are considered. The energy change caused by the loop nucleation is calculated. The critical condition for the onset of the loops is given and analyzed in detail. The most favorable sites in nanowires and the optimal loop shape are defined.

 core-shell nanowires misfit stress relaxation prismatic dislocation loops