Microstructural stability of Cu processed by different routes of severe plastic deformation

J. Gubicza, S. V. Dobatkin, E. Khosravi, A. A. Kuznetsov, J. L. Lábár

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The thermal stability of ultrafine-grained (UFG) microstructure in Cu processed by different routes of severe plastic deformation (SPD) was studied at both high and room temperatures (RT). It was found that the microstructures produced by multi-directional forging or twist extrusion were more stable than those obtained by equal-channel angular pressing (ECAP) or high-pressure torsion (HPT). During storage of the ECAP-processed specimen at RT for 4 years the vacancy concentration reduced significantly while the dislocation density and the crystallite size remained unchanged. In the case of the HPT-processed sample both grain-growth and reduction of the dislocation density were observed.

Original languageEnglish
Pages (from-to)1828-1832
Number of pages5
JournalMaterials Science and Engineering A
Issue number3
Publication statusPublished - Jan 25 2011



  • Aging
  • Dislocations
  • Equal channel angular processing
  • High-pressure torsion
  • Nanostructured materials

ASJC Scopus subject areas

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

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