Numerical modeling of the core structure of [100] dislocations in Fe3C cementite. (1st April 2015)

• Record Type: Journal Article
• Authors: Garvik, N.; Carrez, Ph.; Garruchet, S.; Cordier, P.
• Is Part Of: Scripta materialia. Volume 99(2015)
• Page Start: 61
• Page End: 64
• Publication Date: 2015-04-01
• Subjects: Cementite -- Slip system -- Generalized stacking fault energies -- Screw dislocation core; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2014.11.028
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : The core structure of [100] screw dislocation has been modeled in Fe3 C cementite, using the Peierls–Nabarro–Galerkin model based on γ-surfaces for (010) and (001) planes. We show that γ-surfaces and core structure of the [100] screw dislocation depend of the relaxation procedure applied to the carbon atoms during γ-surface calculations. We find that [100] screw dislocations spread in (010) with a tendency toward dissociation, which is in agreement with dislocation features observed experimentally.