Dislocation core field. II. Screw dislocation in iron

Article

关键词: CENTERED CUBIC METALS;    ALPHA-IRON;    AB-INITIO;    ANISOTROPIC CRYSTALS;    POINT-DEFECTS;    FCC METALS;    FE;    POLARIZABILITIES;    POTENTIALS;    SIMULATION;   

DOI  :  10.1103/PhysRevB.84.224107

来源: SCIE

【 摘 要 】

The dislocation core field, which comes in addition to the Volterra elastic field, is studied for the < 111 > screw dislocation in alpha-iron. This core field, evidenced and characterized using ab initio calculations, corresponds to a biaxial dilatation, which we modeled within the anisotropic linear elasticity. We show that this core field needs to be considered when extracting quantitative information from atomistic simulations, such as dislocation core energies. Finally, we look at how dislocation properties are modified by this core field by studying the interaction between two dislocations composing a dipole, as well as the interaction of a screw dislocation with a carbon atom.

【 授权许可】

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