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Computer modeling of the relay mechanism of transfer of plastic flow from grain to grain

K.Borysovska,
 
Y.Podrezov,
 
S.Firstov
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Electron Microscopy and Strength of Materials - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2017, #23
http://www.materials.kiev.ua/article/2466

Abstract

In this paper, a computer simulation of the relay mechanism for the transfer of plastic deformation from grain to grain is performed. It is shown that for grains over 1 μm the Hall—Petch law is satisfied. At grain sizes less than 1 μm. the dependence is disrupted, since the image force increase and additional external stress is required to trigger dislocation sources, which leads to an inverse dependence of the yield strength on the grain size. Full text download


DISLOCATION, DISLOCATION SOURCE, GRAIN BOUNDARY, HOLL—PETCH LAW

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