Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Aluminium Content on High Temperature Deformation Behavior of TiAl Intermetallic Compound

  • Han, Chang-Suk (Dept. of Defense Science & Technology, Hoseo University)
  • Received : 2015.07.02
  • Accepted : 2015.07.23
  • Published : 2015.08.27
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Abstract

Fundamental studies of microstructural changes and high temperature deformation of titanium aluminide (TiAl) were conducted from the view point of the effect of Al content in order to develop the manufacturing process of TiAl. Microstructures in an as cast state consisted mainly of lamellar structure irrespective of Al content. By homogenization at 1473 K, the microstructures of Ti-49Al and Ti-51Al were transformed into an equiaxial structure which was composed of ${\gamma}$-TiAl, while the lamellar structure that was observed in Ti-46Al and Ti-47Al was much more stable. We found that the reduction of Al content suppressed the formation of equiaxial grains and resulted in a microstructure of only a lamellar structure. On Ti-49Al and Ti-51Al, dynamic recrystallization occurred during high temperature deformation, and the microstructure was transformed into a fine equiaxial one, while the microstructures of Ti-46Al and Ti-47Al contained few recrystallized grains and consisted mainly of a deformed lamellar structure. We observed that on the low-Al alloys the lamellar structure under hard mode deformation conditions deformed as kink observed B2-NiAl. High temperature deformation characteristics of TiAl were strongly affected by Al content. An increase of Al content resulted in a decrease of peak stress and activation energy for plastic deformation and an increase of the recrystallization ratio in TiAl.

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References

  1. T. Kawabata, T. Kanai and O. Izumi, Acta Metall., 33(7), 1355 (1985). https://doi.org/10.1016/0001-6160(85)90245-7
  2. W. Liang and D. Yang, Acta Metall. Sinica, 34, 597 (1998).
  3. M. Zupan and K. J. Hemker, Mater. Sci. Eng. A, 319, 810 (2001).
  4. C. S. Han, J. Kor. Soc. Heat Treat., 18(5), 281 (2005).
  5. C. S. Han and K. W. Koo, Kor. J. Mater. Res., 18(1), 51 (2008). https://doi.org/10.3740/MRSK.2008.18.1.051
  6. H. Li, M. Li, Y. Wu, H. Zhou, X. Wu, Z. Zhu, C. Li, L. Xu, J. Ji, Y. Hua, T. Su, C. Ji and W. Zhang, Intermetallics, 28, 156 (2012). https://doi.org/10.1016/j.intermet.2012.04.017
  7. A. El-Chaikh, T. K. Heckel and H. J. Christ, Int. J. Fatigue, 53, 26 (2013). https://doi.org/10.1016/j.ijfatigue.2011.08.005
  8. Z. Li, L. Qi, X. Huang and C. Cao, J. Aero. Mater., 26, 66 (2006).
  9. T. Tetsui, T. Kobayashi and H. Harada, Mater. Sci. Eng. A, 552, 345 (2012). https://doi.org/10.1016/j.msea.2012.05.050
  10. R. A. Yankov, A. Kolitsch, J. Borany, A. Mucklich, F. Munnik, A. Donchev and M. Schutze, Surf. Coat. Technol., 206, 3595 (2012). https://doi.org/10.1016/j.surfcoat.2012.02.048
  11. A. Brotzu, F. Felli and D. Pilone, Intermetallics, 54, 176 (2014). https://doi.org/10.1016/j.intermet.2014.06.007
  12. T. Fujiwara, A. Nakamura, M. Hosomi, S. R. Nishitani, Y. Shirai and M. Yamaguchi, Philo. Mag., 61, 591 (1990). https://doi.org/10.1080/01418619008231937
  13. C. McCullough, J. J. Valencia, C. G. Levi and R. Mehrabian, Acta Metall., 37, 1321 (1989). https://doi.org/10.1016/0001-6160(89)90162-4
  14. H. Jabbar, A. Couret, L. Durand and J. P. Monchoux, J. Alloys Comp., 509, 9826 (2011). https://doi.org/10.1016/j.jallcom.2011.08.008
  15. G. Wang, L. Xu, Y. Tian, Z. Zheng, Y. Cui and R. Yang, Mater. Sci. Eng., 528(22-23), 6754 (2011). https://doi.org/10.1016/j.msea.2011.05.071
  16. M. Yamaguchi, K. Kishida, M. Kobayashi, H. Inui, M. Kawasaki and K. Ibe, Philo. Mag., A, 74, 451 (1996). https://doi.org/10.1080/01418619608242154
  17. R. T. Pascoe and C. W. A. Newey, Phys. Stat. Sol., 29, 357 (1968). https://doi.org/10.1002/pssb.19680290136
  18. M. Maki and I. Tamura, Tetsu-to-Hagnne, 706, 2073 (1984).
  19. K. Ouchi, Y. Iijima and K. Hirano, in Proceedings of the 4th International Conference on Titanium (Kyoto, Japan, May 1980). ed. H. Kimura & O. Izumi (Titanium'80 Science and Technology, AIME) p.559
  20. W. Sprengel, H. Nakajima and H. Oikawa, Mater. Sci. Eng., 213, 45 (1996). https://doi.org/10.1016/0921-5093(96)10246-X
  21. T. Sakai and M. Oohashi, Tetsu-to-Hagane, 67, 2000 (1981). https://doi.org/10.2355/tetsutohagane1955.67.11_2000

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