Atomic structure of 66° [1̄10] asymmetric tilt grain boundary in aluminum

M. Shamsuzzoha, P. A. Deymier, David J. Smith

Research output: Contribution to journalConference articlepeer-review


A 66° [1̄10] asymmetric tilt grain boundary in Al prepared by cold rolling and annealing has been studied by high-resolution electron microscopy. Due to a 4.5° deviation from the perfect Σ3 misorientation, the boundary is heavily faceted with straight segments running parallel to (1̄1̄1) and (112) planes. All atomic sites across the (1̄1̄1) facets appear to be coincident with the (111) planes at an angle of 66°. The line defects which accommodate the deviation from the perfect twin orientation result in grain boundary stepping. The observed structural features can be described in terms of secondary grain boundary dislocations with Burgers vectors of the type 1/3〈111〉, and 1/6〈112〉 as well as their interactions.

Original languageEnglish (US)
Pages (from-to)139-144
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
StatePublished - 1997
EventProceedings of the 1996 MRS Fall Meeting - Boston, MA, USA
Duration: Dec 4 1996Dec 5 1996

ASJC Scopus subject areas

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


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