Microstructure and strength of severely deformed fcc metals

J. Gubicza, N. Q. Chinh, T. Csanádi, T. G. Langdon, T. Ungár

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

The relationship is examined between the microstructure and the strength of ultrafine-grained fcc metals (Al, Al-Mg alloys, Cu and Ni) processed by severe plastic deformation. The saturation value of the yield strength obtained at high strains is correlated with the dislocation density by using the Taylor equation. The results suggest that the main strengthening mechanism in severely deformed fcc metals is the interaction between dislocations. Furthermore, the saturation strength of different fcc metals deformed at room temperature may be described by using the shear modulus and the absolute melting point. The results of the analysis show that for Al-Mg alloys the addition of the Mg alloying element to the Al matrix leads to an increase in the maximum value of the dislocation density and consequently to an increase in the strength.

Original languageEnglish
Pages (from-to)86-90
Number of pages5
JournalMaterials Science and Engineering A
Volume462
Issue number1-2
DOIs
Publication statusPublished - Jul 25 2007

Keywords

  • Dislocation density
  • Saturation strength
  • Severe plastic deformation
  • Ultrafine-grained fcc metals
  • X-ray diffraction line profile analysis

ASJC Scopus subject areas

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

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