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

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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.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA

    B. G. Clark, I. M. Robertson & L. M. Dougherty

  2. Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA

    D. C. Ahn & P. Sofronis

Authors
  1. B. G. Clark
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  2. I. M. Robertson
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  3. L. M. Dougherty
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  4. D. C. Ahn
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  5. P. Sofronis
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Correspondence to I. M. Robertson.

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This author was an editor of this focus issue during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/publications/jmr/policy.html.

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Clark, B.G., Robertson, I.M., Dougherty, L.M. et al. High-temperature dislocation-precipitate interactions in Al alloys: An in situ transmission electron microscopy deformation study. Journal of Materials Research 20, 1792–1801 (2005). https://doi.org/10.1557/JMR.2005.0224

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  • DOI: https://doi.org/10.1557/JMR.2005.0224

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