Dislocation glide in Fe-carbon solid solution: From atomistic to continuum level description

Hassan A. Khater, Ghiath Monnet, Dmitry Terentyev, Anna Serra

    Research outputpeer-review

    27 Scopus citations

    Abstract

    The role of interstitial carbon impurities on the dislocation glide in bcc iron is investigated by means of molecular dynamics simulations. The local stress induced by carbon atoms, interaction energy map for the a 0/2〈1 1 1〉{1 1 0} and a0/2〈1 1 1〉{1 1 2} edge dislocations and the dynamics of dislocation-carbon interaction is assessed. The local stress exerted on the dislocation due to the carbon atoms and computed by atomistic simulations is used to describe the interaction strength on the continuum level. The derived here analysis of the atomistic data enabled the determination of the activation enthalpy and volume as a function of stress. Having that information, a comparative study demonstrates that at finite temperature, the resistance to the dislocation glide induced by the carbon atoms is lower in {1 1 2} than in {1 1 0} slip systems.

    Original languageEnglish
    Pages (from-to)34-49
    Number of pages16
    JournalInternational Journal of Plasticity
    Volume62
    DOIs
    StatePublished - Nov 2014

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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