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Dislocation core field. II. Screw dislocation in iron

Abstract : 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.
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https://hal.archives-ouvertes.fr/hal-00654126
Contributor : Emmanuel Clouet Connect in order to contact the contributor
Submitted on : Tuesday, December 20, 2011 - 10:44:47 PM
Last modification on : Monday, December 13, 2021 - 9:14:34 AM
Long-term archiving on: : Friday, November 16, 2012 - 4:15:38 PM

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Emmanuel Clouet, Lisa Ventelon, F. Willaime. Dislocation core field. II. Screw dislocation in iron. Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2011, 84 (22), pp.224107. ⟨10.1103/PhysRevB.84.224107⟩. ⟨hal-00654126⟩

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