Analysis of dislocation core structure in B2 ordered phase by cluster variation method

Yasunori Yamada, Tetsuo Mohri

Research output: Contribution to journalArticlepeer-review

Abstract

Theoretical framework of the Cluster Variation Method (CVM) is extended in two directions. One is the construction of a supercell in which the basic clusters are aligned in two dimensional directions. The other one is the introduction of the atomic displacement in the flexible lattice. These extensions of the conventional CVM enable us to calculate a core structure of two parallel superpartial dislocations in B2 ordered phase at finite temperatures. It is shown that a large stacking fault is formed inside the two superpartial dislocations at lower temperatures, while the stacking fault appears outside the superpartial dislocations at higher temperatures.

Original languageEnglish
Pages (from-to)1571-1577
Number of pages7
JournalMaterials Transactions
Volume53
Issue number9
DOIs
Publication statusPublished - 2012

Keywords

  • Anti-phase boundary
  • B2 ordered phase
  • Cluster variation method
  • Core structure of dislocation

ASJC Scopus subject areas

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

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