Microstructure of severely deformed metals determined by X-ray peak profile analysis

J. Gubicza, N. H. Nam, L. Balogh, R. J. Hellmig, V. V. Stolyarov, Y. Estrin, T. Ungár

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Two essentially different metals, fcc copper and hexagonal titanium, were deformed by equal channel angular pressing (ECAP) up to eight passes. The microstructure developed as a result of severe plastic deformation (SPD) was studied by X-ray peak profile analysis. The formation of submicron grain sized structures was studied as a function of the number of ECAP passes. Thermal stability of the microstructure in both copper and titanium was examined by differential scanning calorimetry (DSC). During the isothermal heat-treatment of copper a bi-modal microstructure was formed, as manifested in a special shape of the peak profiles. In titanium, a considerable fraction of dislocations gets annihilated at temperatures well below the exothermic peak in the DSC curve.

Original languageEnglish
Pages (from-to)248-252
Number of pages5
JournalJournal of Alloys and Compounds
Volume378
Issue number1-2
DOIs
Publication statusPublished - Sep 22 2004

Keywords

  • Dislocations
  • Metals
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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