Dislocation arrangement and residual long-range internal stresses in copper single crystals at large deformations

A. Borbély, G. Hoffmann, E. Aernoudt, T. Ungár

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29 Citations (Scopus)

Abstract

Copper single-crystals were wire drawn far into stage III and into the onset of stage IV. TEM investigations revealed the well known dislocation cell structure. High resolution X-ray diffraction line profile analysis was performed on the deformed specimens. The diffraction experiments have provided characteristically asymmetric line profiles which were evaluated for the dislocation densities and arrangements and for the residual long-range internal stresses prevailing in a dislocation cell structure. The formal dislocation densities were found to be spatially anisotropic and were interpreted in terms of anisotropic Burgers vector populations. The residual long-range internal stresses were found to form plane-stress states in conformity with the applied stress conditions. A microscopic model has been suggested accounting for the density and arrangement of dislocations and for the residual long-range internal stresses, at the same time, in a self consistent manner.

Original languageEnglish
Pages (from-to)89-98
Number of pages10
JournalActa Materialia
Volume45
Issue number1
DOIs
Publication statusPublished - Jan 1997

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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