Nucleation and development of plasticity in nanocrystalline BCC iron under shear loading
The features of the nucleation and development of plasticity in nanocrystalline iron with BCC lattice under shear were studied. The mechanisms of plastic deformation playing the main role in the development of structural rearrangements during loading were revealed. It was shown that the development of plasticity can be conditionally divided into several stages. The first stage of plasticity development is associated with the formation and propagation of dislocations and twins. At the second stage, intraganular slip and intergranular sliding begin to make the main contribution to plastic deformation. These processes initiate a change in the shape of the grains. At large shear, the deformation behavior of the sample is governed by the migration of the interfaces. Not only grain boundaries migrate but also twin ones do. As a result of migration processes, the grain sizes of the nanocrystalline sample are enlarged.
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Keywords
molecular dynamics, grain boundary migration, atomic plasticity mechanisms, plastic deformation, twinning, dislocation, structural defectsAuthors
| Name | Organization | |
| Zolnikov K.P. | Institute of Strength Physics and Materials Science of SB RAS | kost@ispms.ru |
| Kryzhevich D.S. | Institute of Strength Physics and Materials Science of SB RAS | kryzhev@ispms.ru |
| Korchuganov A.V. | Institute of Strength Physics and Materials Science of SB RAS | avkor@ispms.ru |
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