Features of Structural Transformations under Deformation of Nanocrystalline BCC Fe

KP Zolnikov and DS Kryzhevich and AV Korchuganov, PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON PHYSICAL MESOMECHANICS. MATERIALS WITH MULTILEVEL HIERARCHICAL STRUCTURE AND INTELLIGENT MANUFACTURING TECHNOLOGY, 2310, 020366 (2020).

DOI: 10.1063/5.0034178

In the framework of the molecular dynamics method, different plasticity mechanisms in a nanocrystalline bcc iron sample under shear loading were investigated. It was shown that the nucleation of plasticity occurs in grains for which the orientation of twinning planes is close to the direction of shear. First, plasticity in the sample is realized through the generation of twins and dislocations. Then, accommodation of the structure of the sample involves such grain-boundary processes as a change in the grain shape, grain boundary sliding and grain boundary migration.

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