Orientation imaging microscopy of ultrafine-grained nickel

A. P. Zhilyaev, B. K. Kim, G. V. Nurislamova, M. D. Baró, J. A. Szpunar, T. G. Langdon

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231 Citations (Scopus)


The orientation imaging of ultrafine-grained nickel processed by high pressure torsion (HPT) and equal channel angular pressing (ECAP) was discussed. The grain boundary misorientation distributions were measured by both procedures. High fractions of high-angle boundaries and higher fractions of low-angle boundaries were obtained by the techniques. Higher fraction of high-angle boundaries obtained after HPT indicates that the rotation mode and dynamic recovery are more pronounced in HPT than in ECAP due to higher imposed strain.
Original languageEnglish
Pages (from-to)575-580
JournalScripta Materialia
Publication statusPublished - 1 Apr 2002


  • Equal channel angular pressing
  • Grain boundaries
  • High-pressure torsion
  • Nickel
  • Orientation imaging microscopy


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