Materials Transactions Online

Materials Transactions, Vol.50 No.01 (2009) pp.96-100
© 2009 The Japan Institute of Metals

Microstructure Evolution in Pure Al Processed with Twist Extrusion

Dmitry Orlov1, Yan Beygelzimer2, Sergey Synkov2, Viktor Varyukhin2, Nobuhiro Tsuji1 and Zenji Horita3

1Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University, Suita 565-0871, Japan
2Department of Physics of High Pressures and Advanced Technologies, Donetsk Institute for Physics & Engineering of the National Academy of Sciences–Ukraine, 72 R. Luxembourg St., Donetsk, 83114, Ukraine
3Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan

High purity Al (99.99%) was subjected to severe plastic deformation through twist extrusion at room temperature. Microstructures were examined for 1 pass and 4 passes on the cross section perpendicular to the longitudinal axis of billets using optical microscopy and electron back scatter diffraction analysis. It was shown that a vortex-like material flow was observed on the cross section and this became more intense with increasing number of the pressing. After one pass, subgrain structures with low angle grain boundaries were developed throughout the section but after 4 passes, the microstructure consisted of grains surrounded by high angle boundaries with fraction of ∼70% in the edge parts. The average grain size at the edge parts is refined to ∼1.6 μm.

(Received 2008/4/18; Accepted 2008/7/28; Published 2008/9/10)

Keywords: aluminum, twist extrusion, severe plastic deformation, optical microscopy, electron backscattered diffraction (EBSD)

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REFERENCES

  1. T. M. Osman, D. E. Rardon, L. B. Friedman and L. F. Vega: The Journal of Materials 58 (2006) 21–24.
  2. T. C. Lowe: The Journal of Materials 58 (2006) 28–32.
  3. R. Z. Valiev, Y. Estrin, Z. Horita, T. G. Langdon, M. J. Zehetbauer and Y. T. Zhu: The Journal of Materials 58 (2006) 33–39.
  4. P. W. Bridgman: Studies in Large Plastic Flow and Fracture: With Special Emphasis on the Effects of Hydrostatic Pressure, (McGraw-Hill, New York, 1952).
  5. V. M. Segal, V. I. Reznikov, A. E. Drobyshevkiy and V. I. Kopylov: Russian Metall (1981) 99.
  6. V. M. Segal: Mater. Sci. Eng. A 197 (1995) 157–164.
  7. G. A. Salishchev, O. R. Valiahmetov, R. M. Galeev and S. P. Malysheva: Izvestiya Akademii Nauk SSSR Metally (1996) 86–91.
  8. J. Y. Huang, Y. T. Zhu, H. Jiang and T. C. Lowe: Acta Mater. 49 (2001) 1497–1505.
  9. N. Tsuji, Y. Saito, H. Utsunomiya and S. Tanigawa: Scr. Mater. 40 (1999) 795–800.
  10. Y. Saito, H. Utsunomiya, N. Tsuji and T. Sakai: Acta Mater. 47 (1999) 579–583.
  11. Y. Beygelzimer, D. Orlov and V. Varyukhin: 2002 TMS Annual Meeting and Exhibition, ed. by Y. T. Zhu, T. G. Langdon, R. S. Mishra, S. L. Semiatin, M. J. Saran, T. C. Lowe., (TMS, Seattle, Washington, USA, 2002) pp.297–304.
  12. Y. Beygelzimer, V. Varyukhin, D. Orlov and S. Synkov: Twist extrusion–process for strain accumulation, (TEAN, Donetsk, 2003) p.87.
  13. Y. Y. Beygelzimer, V. N. Varyukhin, S. G. Synkov, A. N. Sapronov and V. G. Synkov: Physics and Technology of High Pressures 9 (1999) 109–110.
  14. Y. Beygelzimer and D. Orlov: Defect and Diffusion Forum 208–209 (2002) 311–314.
  15. M. Berta, D. Orlov and P. B. Prangnell: Inter. J. Mater. Res. 98 (2007) 200–204.
  16. Y. Beygelzimer, D. Orlov, A. Korshunov, S. Synkov, V. Varyukhin, I. Vedernikova, A. Reshetov, A. Synkov, L. Polyakov and I. Korotchenkova: Solid State Phenomena 114 (2006) 69–78.
  17. D. Orlov, A. Reshetov, A. Synkov, V. Varyukhin, D. Lotsko, O. Sirko, N. Zakharova, A. Sharovsky, V. Voropaiev, Y. Milman and S. Synkov: Twist Extrusion as a Tool for Grain Refinement in Al-Mg-Sc-Zr Alloys, ed. by Y. T. Zhu, V. Varyukhin vol 212, (Springer Netherlands, 2006) pp.77–82.
  18. V. V. Stolyarov, Y. E. Beigel'zimer, D. V. Orlov and R. Z. Valiev: The Physics of Metals and Metallography 99 (2005) 204–211.
  19. D. V. Orlov, V. V. Stolyarov, H. S. Salimgareyev, E. P. Soshnikova, A. V. Reshetov, Y. Y. Beygelzimer, S. G. Synkov and V. N. Varyukhin: 2004 TMS Annual Meeting, ed. by Y. T. Zhu, T. G. Langdon, R. Z. Valiev, S. L. Semiatin, D. H. Shin, T. C. Lowe, (TMS, Charlotte, North Carolina, USA, 2004) pp.457–462.
  20. Y. Beygelzimer, V. Varyukhin, D. Orlov, B. Efros, V. Stolyarov and H. Salimgareyev: 2002 TMS Annual Meeting and Exhibition, ed. by Y. T. Zhu, T. G. Langdon, R. S. Mishra, S. L. Semiatin, M. J. Saran and T. C. Lowe, (TMS Seattle, Washington, USA, 2002) pp.43–46.
  21. N. Kamikawa, N. Tsuji, X. Huang and N. Hansen: Acta Mater. 54 (2006) 3055–3066.
  22. Y. Iwahashi, Z. Horita, M. Nemoto and T. G. Langdon: Acta Mater. 46 (1998) 3317–3331.
  23. S. D. Terhune, D. L. Swisher, K. Oh-ishi, Z. Horita, T. G. Langdon and T. R. McNelley: Metall. Mater. Trans. A 33A (2002) 2173–2184.
  24. A. P. Zhilyaev, D. L. Swisher, K. Oh-ishi, T. G. Langdon and T. R. McNelley: Mater. Sci. Eng. A 429 (2006) 137–148.
  25. D. Orlov, Y. Beygelzimer, S. Synkov, V. Varyukhin and Z. Horita: Mater. Trans. 49 (2008) 2–6.
  26. F. J. Humphreys: Scr. Mater. 51 (2004) 771–776.
  27. M. Furukawa, Y. Iwahashi, Z. Horita, M. Nemoto and T. G. Langdon: Mater. Sci. Eng. A 257 (1998) 328–332.

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