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

30 Citations (Scopus)

Abstract

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
Pages (from-to)1792-1801
Number of pages10
JournalJournal of Materials Research
Volume20
Issue number7
DOIs
Publication statusPublished - Jul 1 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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