The process of single crystals plastic deformation at the atomic level according to the previously proposed discrete model is described. The single crystals are considered as a two-phase structure, consisting of surface layers and inner regions of a perfect crystalline lattice. The effect of surface on the strength of single crystals of perfect structure is analyzed. As the proportion of the surface layer in the total volume of thick single crystals is small, this influence is insignificant. Increase of the number of defects after plastic deformation significantly increases the crystal strength. On the other hand, because of the small size of whisker crystals, the surface is of significant influence. It is concluded that the mechanisms of plastic deformation at the atomic level are the same for both thin and thick crystals, despite the differences in their stress-strain diagrams.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 58, No. 4, pp. 37–44, July–August, 2022
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Kozak, L.Y. Specific Features of Whisker Crystals Plastic Deformation. Mater Sci 58, 466–473 (2023). https://doi.org/10.1007/s11003-023-00686-2
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DOI: https://doi.org/10.1007/s11003-023-00686-2