Nucleation of dislocations and twins in fcc nanocrystals: Dynamics of structural transformations

Aleksandr V. Korchuganov, Aleksandr N. Tyumentsev, Konstantin P. Zolnikov, Igor Yu Litovchenko, Dmitrij S. Kryzhevich, Elazar Gutmanas, Shouxin Li, Zhongguang Wang, Sergey G. Psakhie

    Результат исследований: Материалы для журналаСтатья

    5 Цитирования (Scopus)

    Выдержка

    This paper reports on a molecular dynamics study of structural rearrangements in a copper nanocrystal during nucleation of plastic deformation under uniaxial tension. The study shows that the resulting nucleation of partial dislocations on the free surface and their glide occurs through local fcc→bcc→hcp transformations via consistent atomic displacements. We propose an atomic model for the generation of dislocations and twins based on local reversible fcc→bcc→fcc transformations, with the reverse one proceeding through an alternative system. The model gives an insight into possible causes and mechanisms of the generation of partial dislocations and mechanical twins in two and more adjacent planes of plastically deformed nanocrystals. The obtained data allow a better understanding of how plasticity is generated in nanostructured materials.

    Язык оригиналаАнглийский
    Страницы (с-по)201-206
    Число страниц6
    ЖурналJournal of Materials Science and Technology
    Том35
    Номер выпуска1
    DOI
    СостояниеОпубликовано - 1 янв 2019

    Отпечаток

    Dislocations (crystals)
    Nanocrystals
    Nucleation
    Nanostructured materials
    Plasticity
    Molecular dynamics
    Copper
    Plastic deformation

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Mechanics of Materials
    • Mechanical Engineering
    • Polymers and Plastics
    • Metals and Alloys
    • Materials Chemistry

    Цитировать

    Korchuganov, A. V., Tyumentsev, A. N., Zolnikov, K. P., Litovchenko, I. Y., Kryzhevich, D. S., Gutmanas, E., ... Psakhie, S. G. (2019). Nucleation of dislocations and twins in fcc nanocrystals: Dynamics of structural transformations. Journal of Materials Science and Technology, 35(1), 201-206. https://doi.org/10.1016/j.jmst.2018.09.025

    Nucleation of dislocations and twins in fcc nanocrystals : Dynamics of structural transformations. / Korchuganov, Aleksandr V.; Tyumentsev, Aleksandr N.; Zolnikov, Konstantin P.; Litovchenko, Igor Yu; Kryzhevich, Dmitrij S.; Gutmanas, Elazar; Li, Shouxin; Wang, Zhongguang; Psakhie, Sergey G.

    В: Journal of Materials Science and Technology, Том 35, № 1, 01.01.2019, стр. 201-206.

    Результат исследований: Материалы для журналаСтатья

    Korchuganov, AV, Tyumentsev, AN, Zolnikov, KP, Litovchenko, IY, Kryzhevich, DS, Gutmanas, E, Li, S, Wang, Z & Psakhie, SG 2019, 'Nucleation of dislocations and twins in fcc nanocrystals: Dynamics of structural transformations', Journal of Materials Science and Technology, том. 35, № 1, стр. 201-206. https://doi.org/10.1016/j.jmst.2018.09.025
    Korchuganov AV, Tyumentsev AN, Zolnikov KP, Litovchenko IY, Kryzhevich DS, Gutmanas E и соавт. Nucleation of dislocations and twins in fcc nanocrystals: Dynamics of structural transformations. Journal of Materials Science and Technology. 2019 Янв. 1;35(1):201-206. https://doi.org/10.1016/j.jmst.2018.09.025
    Korchuganov, Aleksandr V. ; Tyumentsev, Aleksandr N. ; Zolnikov, Konstantin P. ; Litovchenko, Igor Yu ; Kryzhevich, Dmitrij S. ; Gutmanas, Elazar ; Li, Shouxin ; Wang, Zhongguang ; Psakhie, Sergey G. / Nucleation of dislocations and twins in fcc nanocrystals : Dynamics of structural transformations. В: Journal of Materials Science and Technology. 2019 ; Том 35, № 1. стр. 201-206.
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    abstract = "This paper reports on a molecular dynamics study of structural rearrangements in a copper nanocrystal during nucleation of plastic deformation under uniaxial tension. The study shows that the resulting nucleation of partial dislocations on the free surface and their glide occurs through local fcc→bcc→hcp transformations via consistent atomic displacements. We propose an atomic model for the generation of dislocations and twins based on local reversible fcc→bcc→fcc transformations, with the reverse one proceeding through an alternative system. The model gives an insight into possible causes and mechanisms of the generation of partial dislocations and mechanical twins in two and more adjacent planes of plastically deformed nanocrystals. The obtained data allow a better understanding of how plasticity is generated in nanostructured materials.",
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    AU - Korchuganov, Aleksandr V.

    AU - Tyumentsev, Aleksandr N.

    AU - Zolnikov, Konstantin P.

    AU - Litovchenko, Igor Yu

    AU - Kryzhevich, Dmitrij S.

    AU - Gutmanas, Elazar

    AU - Li, Shouxin

    AU - Wang, Zhongguang

    AU - Psakhie, Sergey G.

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