Characteristic dislocation substructure in 101¯2 twins in hexagonal metals

F. Wang, K. Hazeli, K. D. Molodov, C. D. Barrett, T. Al-Samman, D. A. Molodov, A. Kontsos, K. T. Ramesh, H. El Kadiri, S. R. Agnew

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Based on transmission electron microscopy results from pure Mg single crystal examined in the current work, and Mg alloys and other hexagonal metals in literature, a characteristic dislocation substructure inside 101¯2 twins is identified. Abundant non-basal [c] and ⟨c + a⟩ perfect dislocations, as well as basal I1 stacking faults with widths on the order of 100 nm distributed preferentially in the vicinity of a twin boundary, with a low density zone in the middle of the twin. Considering the ubiquity of 101¯2 twins, this characteristic dislocation substructure should be considered in modeling of hexagonal metal alloy deformation.

Original languageEnglish (US)
Pages (from-to)81-85
Number of pages5
JournalScripta Materialia
Volume143
DOIs
StatePublished - Jan 15 2018
Externally publishedYes

Keywords

  • Dislocation
  • Fault
  • Plasticity
  • Single crystal
  • Twinning

ASJC Scopus subject areas

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

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