Relaxation of elastic stresses in overlayed microcrystals

Misfit Disclinations and Dislocation Walls in a Two-Phase Cylindrical Composite

“…Disclination mechanisms of residual or misfit stress relaxation have also been discussed in literature with application to pentagonal nanoparticles [23][24][25][26] and thin-film structures [27][28][29][30][31][32][33][34]. The use of disclination terms in this context may be supported by the geometrically-based concept of interface disclinations [35][36][37].…”

Misfit stress relaxation in composite nanoparticles

“…Following Trusov et al (1991) in some principal points, we show an updated sketch of basic stress relaxation mechanisms in Fig. 3.…”

“…1(a)). Probably the first work in this field was done by Trusov, Tanakov, Gryaznov, Kaprelov, and Romanov (1991) who suggested two different models for the initial residual strained state and briefly discussed some possible channels for its relaxation. The initial strained state in a core-shell CNP caused by the icosahedral crystallography order either in the shell or in both the core and shell was examined by Gryaznov, Kaprelov, Polonskii, and Romanov (1991) with using the concept of a Marks-Yoffe disclination (Howie & Marks, 1984).…”

“…Following (Trusov et al, 1991), we consider below the critical conditions for the onset of stress relaxation through generation of misfit dislocations and nucleation of various cracks in core-shell CNPs. In doing so, we will prefer some simple approximate estimates rather than strict and cumbersome mathematical constructions.…”

Initial stages of misfit stress relaxation in composite nanostructures through generation of rectangular prismatic dislocation loops

“…For spherical composite nanostructures, the mechanisms of misfit stress relaxation were first discussed by Trusov et al [53]. Recently, the corresponding critical conditions have been calculated approximately for some relaxation mechanisms [54][55][56] and, more precisely, for one of them, that is the generation of circular http://dx.doi.org/10.1016/j.actamat.2015.01.020 1359-6462/Ó 2015 Acta Materialia Inc.…”