Physical mesomechanics of crystal structure refinement upon severe plastic deformation

V. E. Panin, V. E. Egorushkin

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A mechanism of crystal structure refinement in solids subjected to severe plastic deformation is proposed in the framework of a multiscale approach adopted in physical mesomechanics and nonequilibrium thermodynamics. The basis of the mechanism observed in nanostructuring of metallic materials is fragmentation of bent band structures comprising subbands of a base material and a defect one. As the crystal subbands are fragmented the subbands of the defect phase occupy the interfaces between the fragments. "Chessboard-like" distribution of normal and tangential tensile and compressive stresses at the interface between the base and defect material plays an important role in this process. A lower limit to initial crystal structure refinement for different severe plastic deformation techniques is examined.

Original languageEnglish
Pages (from-to)203-212
Number of pages10
JournalPhysical Mesomechanics
Volume11
Issue number5-6
DOIs
Publication statusPublished - 1 Jan 2008

Keywords

  • bulk nano structuring
  • nonequilibrium thermodynamics
  • physical mesomechanics

ASJC Scopus subject areas

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

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