Abstract
Behavior of symmetrical tilt grain boundaries under shear loading was studied in the framework of classical molecular dynamics. Grain boundaries Σ5, Σ9 and Σ11 in Ni and α-Fe were modelled. It was found that behavior of defects depends not only on the structure of boundaries, but also on the type of crystal lattice. It was shown that under external stress grain boundary behaves differently in the BCC and FCC metal. A comparison of the value of displacement of GB with the value of grain boundary slip under the condition of shear deformation was performed. These results can help to understand the features of development of plastic deformation in polycrystals under shear loading.
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