Deformation-Induced Interfacial Interaction in Elastically-Plastically Deformed Single Crystals of Cd$_x$Hg$_{1-x}$Te

B. P. Koman

Ivan Franko National University of Lviv, 1 Universytetska Str., UA-79000 Lviv, Ukraine

Received: 14.11.2016; final version - 13.08.2017. Download: PDF

In this paper, features of deformation-induced interfacial interaction in uniaxial loaded crystals and its contribution to the formation of a stressedly plastic state are analysed. As found, the uniaxial deformed crystal is a complex structure including the following interphase-interacting elements: 1) the ‘debris’-layer, which is formed in the previous stage of pseudo-elastic deformation in the crystal surface region, and the bulk of a crystal; 2) the locally fragmented cells within the bulk of a crystal, which are disoriented at certain angles relatively to each other and characterized by different Young’s moduli $Е_1$,…, $Е_n$. The behaviour of loading diagram is determined by interaction of the two types: between the ‘debris’-layer, which has the highest Young’s modulus, and the bulk of deformed crystal as well as directly between the local cells in the bulk of fragmented structure of a crystal. In deformed Cdx$_x$Hg$_{1-x}$Te crystals, new types of dissipative structures are revealed. The energy parameters of interfacial interactions caused by mechanical incompatibility of adjoining regions and their correlation with the rate of strain hardening $\theta$ at its stage L$_2$ are estimated.

Key words: interfacial interaction, deformation, deformation fragments, Young’s modulus, dissipation.



PACS: 05.65.+b,, 68.35.Dv, 68.35.Gy, 68.35.Md, 68.55.J-, 81.40.Jj

Citation: B. P. Koman, Deformation-Induced Interfacial Interaction in Elastically-Plastically Deformed Single Crystals of Cd$_x$Hg$_{1-x}$Te, Metallofiz. Noveishie Tekhnol., 39, No. 8: 1129—1148 (2017)

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