Thermal stability of the microstructure of severely deformed copper

L. Balogh, J. Gubicza, R. J. Hellmig, Y. Estrin, T. Ungár

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Copper specimens were deformed by equal channel angular pressing (ECAP) up to 8 passes. The microstructure was studied by X-ray line profile analysis. The crystallite size is reduced to a few tens of nanometers even after the first ECAP pass and it does not change significantly during further deformation. At the same time, the dislocation density increases gradually up to 4 ECAP passes. The thermal stability of the microstructure is examined by differential scanning calorimetry (DSC). The temperature of the DSC peak decreases whereas the stored energy increases with increasing strain. At the beginning of the heat release a bimodal grain structure develops indicated by a special double-peak shape of the diffraction line profiles.

Original languageEnglish
Pages (from-to)381-386
Number of pages6
JournalZeitschrift fur Kristallographie, Supplement
Volume2
Issue number23
DOIs
Publication statusPublished - Jan 1 2006

Keywords

  • Bimodal structure
  • Copper
  • Dislocation
  • Equal channel angular pressing
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

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