An atomistic study of the dislocation core structures and mechanical behavior of a model D019 alloy

J. Cserti, M. Khantha, V. Vitek, D. P. Pope

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

As in many other intermetallics, the principal features of the plastic behavior of hexagonal D019 compounds appear to be controlled by the structure of dislocation cores. In the present paper we investigate the possible core configurations of the 〈1210〉 screw dislocations on basal and prism planes in a model D019 structure. First an N-body potential describing atomic interactions in a mechanically and structurally stable model D019 lattice is presented. This potential is then used to investigate the stability of planar faults on basal and prismatic planes and to calculate the core structures of the 1 3〈1210〉 screw superpartials bounding antiphase boundaries on these planes. The possible microscopic origins of the basic characteristics of the plastic deformation of Ti3Al and Mn3Sn are then discussed in the light of these results.

Original languageEnglish
Pages (from-to)95-102
Number of pages8
JournalMaterials Science and Engineering A
Volume152
Issue number1-2
DOIs
Publication statusPublished - May 15 1992

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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