Features of Defect Nucleation in Nanosized Crystals with BCC Lattice

K Zolnikov and D Kryzhevich and A Korchuganov, PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019, 2167, 020408 (2019).

DOI: 10.1063/1.5132275

The atomic mechanisms of nucleation and development of plasticity in an iron nanocrystal under uniaxial uniform tension along different crystallographic directions were studied. It was shown that a twin is formed in the nanocrystal under tension along the 11 (2) over bar direction. The direct and reverse structural transformations of the crystal lattice occur according to the BCC-FCC-BCC scheme on the front of twin propagation. A significant number of twins are formed under tension of the nanocrystal along the 110 direction. In this case, the BCC-FCC-BCC and BCC-HCP-BCC local structural transformations provide the propagation of twins in the nanocrystal body.

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