Comprehensive model of metadislocation movement in Al13Co4

M. Heidelmann, Marc Heggen, Christian Dwyer, Michael Feuerbacher

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Metadislocations are highly complex defects mediating plasticity in several complex metallic alloys. Available models characterizing the atomic rearrangements during the movement of these defects are limited to two dimensions and heavy atomic species. Combining high-resolution scanning transmission electron microscopy, density functional theory and simulated annealing we develop a three-dimensional model of a metadislocation glide step of 12.3 Å in the complex metallic alloy Al13Co4 including all atomic species. The rearrangements within the core are shown to involve maximum atomic jump distances of 3.4 Å.

Original languageEnglish (US)
Pages (from-to)24-27
Number of pages4
JournalScripta Materialia
StatePublished - Mar 15 2015
Externally publishedYes


  • Aluminium alloys
  • High-angle annular dark-field (HAADF)
  • Microscopy and microanalysis techniques
  • dislocation dynamics
  • scanning transmission electron microscopy (STEM)

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys


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