Mechanisms of dynamic rearrangement of the defect substructure of industrial steels

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Abstract

The initial stage of dynamic recrystallization initiated in steels by a high-current electron beam has been studied using the TEM method. It has been shown that the degree of dynamic recrystallization is dictated by the value of the stacking fault energy γSF . In steels with relatively low values of γSF (15–20 mJ/m2), centers of dynamic recrystallization develop by the mechanism of pair coalescence of subgrains, no matter what the crystalline lattice type is. The increase in γSF up to 35–40 mJ/m2 causes a changeover in the mechanism of multiple subgrain coalescence. At much higher values of γSF, dynamic recrystallization evolves by migration of local regions of large-angle grain boundaries.

Original languageEnglish
Pages (from-to)205-211
Number of pages7
JournalHigh Temperature Material Processes
Volume17
Issue number4
Publication statusPublished - 1 Sep 2013

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Keywords

  • Dynamic recrystallization
  • High-current electron beam
  • Steels

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)
  • Materials Science(all)
  • Energy Engineering and Power Technology
  • Spectroscopy
  • Physical and Theoretical Chemistry

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