High-temperature dislocation-precipitate interactions in Al alloys: An in situ transmission electron microscopy deformation study

B. G. Clark, Ian M. Robertson, L. M. Dougherty, D. C. Ahn, P. Sofronis

Research output: Contribution to journalArticle


The fundamental processes controlling the high-temperature interaction of dislocations with precipitates in Al-alloys were investigated in real time by deforming specimens in situ in the transmission electron microscope at elevated temperature. The observations support a bypass mechanism involving the interaction of lattice dislocations with the precipitate-matrix interface dislocations, where the rate-limiting step in the interaction is the release of the dislocation from the particle. These observations are discussed in relation to high-temperature deformation processes and models.

Original languageEnglish (US)
Pages (from-to)1792-1801
Number of pages10
JournalJournal of Materials Research
Issue number7
StatePublished - Jul 1 2005


ASJC Scopus subject areas

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

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