Physical mesomechanics of grain boundary sliding in a deformable polycrystal

V. E. Panin, V. E. Egorushkin, T. F. Elsukova

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The temperature-rate dependences of strain resistance and the mechanisms of grain boundary sliding in Pb polycrystals and Pb-based alloys under active tension were investigated. The activation energy of plastic deformation and grain boundary sliding was determined. The structural mechanisms of grain boundary sliding were studied in a wide temperature range. The conclusion was made that self-consistency of grain boundary sliding and intragranular plastic flow has its origin in rotational deformation modes, with the grain boundary sliding being a primary process. Theoretical analysis of rotational deformation modes involved in grain boundary sliding was performed. It is shown that the dependence of deforming stress on the polycrystal grain size is impossible to describe by one universal Hall-Petch equation.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalPhysical Mesomechanics
Volume16
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • grain boundary sliding
  • Hall-Petch equation
  • rotational deformation modes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces

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