Influence of stacking fault energy on the minimum grain size achieved in severe plastic deformation

Y. H. Zhao, Y. T. Zhu, X. Z. Liao, Zenji Horita, Terence G. Langdon

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Abstract

Samples of pure Cu and a Cu-10% Zn alloy were processed by high-pressure torsion and by high-pressure torsion followed by cold-rolling to a reduction of ∼75%. The grain sizes in these two conditions were measured by transmission electron microscopy and by X-ray diffraction. The experimental results show the average grain size and the width of the grain size distribution are both smaller in the Cu-10% Zn alloy by comparison with pure Cu. This difference is due to the lower stacking fault energy of the Cu-10% Zn alloy. An analysis shows all of the experimental results are consistent with a theoretical model predicting the minimum grain size produced by milling.

Original languageEnglish
Pages (from-to)22-26
Number of pages5
JournalMaterials Science and Engineering A
Volume463
Issue number1-2
DOIs
Publication statusPublished - Aug 15 2007

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All Science Journal Classification (ASJC) codes

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

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