A generalized Peierls-Nabarro model for curved dislocations and core structures of dislocation loops in Al and Cu

Yang Xiang, He Wei, Pingbing Ming, Weinan E

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

In this paper, we present a generalized Peierls-Nabarro model for curved dislocations. In the generalized Peierls-Nabarro model, the anisotropic elastic energy is obtained efficiently by solving the elasticity system associated with the disregistry across the slip plane using the fast Fourier transform method, and the generalized stacking fault energy is used for the interplanar potential across the slip plane. Simulation results are reported on the core structures and the activation energies of dislocation loops in Al and Cu, incorporating both the elastic anisotropy and the full disregistry vector in the slip plane.

Original languageEnglish (US)
Pages (from-to)1447-1460
Number of pages14
JournalActa Materialia
Volume56
Issue number7
DOIs
StatePublished - Apr 1 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Keywords

  • Dislocation
  • Dislocation structures
  • Micromechanical modeling
  • Peierls-Nabarro model

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