Comprehensive model of metadislocation movement in Al13Co4

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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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
Volume98
DOIs
StatePublished - Mar 15 2015
Externally publishedYes

Fingerprint

Defects
defects
simulated annealing
three dimensional models
Simulated annealing
plastic properties
Density functional theory
Plasticity
density functional theory
Transmission electron microscopy
transmission electron microscopy
Scanning electron microscopy
scanning electron microscopy
annealing
high resolution

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Comprehensive model of metadislocation movement in Al13Co4 . / Heidelmann, M.; Heggen, Marc; Dwyer, Christian; Feuerbacher, Michael.

In: Scripta Materialia, Vol. 98, 15.03.2015, p. 24-27.

Research output: Contribution to journalArticle

Heidelmann, M. ; Heggen, Marc ; Dwyer, Christian ; Feuerbacher, Michael. / Comprehensive model of metadislocation movement in Al13Co4 . In: Scripta Materialia. 2015 ; Vol. 98. pp. 24-27.
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