Journal of Materials Science

, Volume 42, Issue 5, pp 1501–1511 | Cite as

Influence of crystal orientation on the processing of copper single crystals by ECAP

  • Yukihide Fukuda
  • Keiichiro Oh-ishi
  • Minoru Furukawa
  • Zenji Horita
  • Terence G. Langdon
Nano May 2006


Single crystals of high-purity copper, having two different orientations, were pressed through one pass in equal-channel angular pressing (ECAP) at room temperature and then examined using several different analytical techniques. For both orientations, it is shown that elongated arrays of cells or subgrains are formed in the first pass with their long axes aligned parallel to the primary \({(\bar {1}\bar {1}\bar {1})[\bar {1}10]}\) slip system. The average width of these subgrains was measured as ∼0.2 μm which is similar to the equilibrium grain size reported in polycrystalline Cu after processing by ECAP. These results confirm earlier observations using an aluminum single crystal except only that the subgrain width in copper is significantly smaller. This difference is attributed to the lower stacking-fault energy in copper and the consequent low rate of recovery.


Slip System Pole Figure Select Area Electron Diffraction Pattern Initial Orientation Slip Direction 
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This work was supported in part by the Light Metals Educational Foundation of Japan and in part by the National Science Foundation of the United States under Grant No. DMR-0243331.


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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • Yukihide Fukuda
    • 1
  • Keiichiro Oh-ishi
    • 1
  • Minoru Furukawa
    • 2
  • Zenji Horita
    • 1
  • Terence G. Langdon
    • 3
  1. 1.Department of Materials Science and Engineering, Faculty of EngineeringKyushu UniversityFukuokaJapan
  2. 2.Department of TechnologyFukuoka University of EducationMunakata, FukuokaJapan
  3. 3.Departments of Aerospace & Mechanical Engineering and Materials ScienceUniversity of Southern CaliforniaLos AngelesUSA

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