Effect of Aluminium Content on High Temperature Deformation Behavior of TiAl Intermetallic Compound

Chang-Suk Han

Korean Journal of Materials Research, Vol.25, No.8, 398-402, August, 2015

DOI10.3740/MRSK.2015.25.8.398 Export Citation

Effect of Aluminium Content on High Temperature Deformation Behavior of TiAl Intermetallic Compound

Chang-Suk Han^†

Dept. of Defense Science & Technology, Hoseo University, 165 Sechul-Ri, Baebang-Myun, Asan City, Chungnam 336-795, Korea

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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 γ-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.

Keywords:high temperature deformation;titanium aluminide;microstructure;lamellar structure

[References]

Kawabata T, Kanai T, Izumi O, Acta Metall., 33(7), 1355 (1985)
Liang W, Yang D, Acta Metall. Sinica, 34, 597 (1998)
Zupan M, Hemker KJ, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 319, 810 (2001)
Han CS, J. Kor. Soc. Heat Treat., 18(5), 281 (2005)
Han CS, Koo KW, Korean J. Mater. Res., 18(1), 51 (2008)
Li H, Li M, Wu Y, Zhou H, Wu X, Zhu Z, Li C, Xu L, Ji J, Hua Y, Su T, Ji C, Zhang W, Intermetallics, 28, 156 (2012)
El-Chaikh A, Heckel TK, Christ HJ, Int. J. Fatigue, 53, 26 (2013)
Li Z, Qi L, Huang X, Cao C, J. Aero. Mater., 26, 66 (2006)
Tetsui T, Kobayashi T, Harada H, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 552, 345 (2012)
Yankov RA, Kolitsch A, Borany J, Mucklich A, Munnik F, Donchev A, Schutze M, Surf. Coat. Technol., 206, 3595 (2012)
Brotzu A, Felli F, Pilone D, Intermetallics, 54, 176 (2014)
Fujiwara T, Nakamura A, Hosomi M, Nishitani SR, Shirai Y, Yamaguchi M, Philos. Mag., 61, 591 (1990)
McCullough C, Valencia JJ, Levi CG, Mehrabian R, Acta Metall., 37, 1321 (1989)
Jabbar H, Couret A, Durand L, Monchoux JP, J. Alloy. Compd., 509, 9826 (2011)
Wang G, Xu L, Tian Y, Zheng Z, Cui Y, Yang R, Mater. Sci. Eng., 528(22-23), 6754 (2011)
Yamaguchi M, Kishida K, Kobayashi M, Inui H, Kawasaki M, Ibe K, Philos. Mag. A, 74, 451 (1996)
Pascoe RT, Newey CWA, Phys. Status Solidi A-Appl. Res., 29, 357 (1968)
Maki M, Tamura I, Tetsu-to-Hagnne, 706, 2073 (1984)
Ouchi K, Iijima Y, Hirano K, in Proceedings of the 4th International Conference on Titanium (Kyoto, Japan, May 1980). ed. Kimura H, Izumi O (Titanium'80 Science and Technology, AIME) p.559
Sprengel W, Nakajima H, Oikawa H, Mater. Sci. Eng., 213, 45 (1996)
Sakai T, Oohashi M, Tetsu-to-Hagane, 67, 2000 (1981)

[Referenced By]

[1] Kawabata T, Kanai T, Izumi O, Acta Metall., 33(7), 1355 (1985)

[2] Liang W, Yang D, Acta Metall. Sinica, 34, 597 (1998)

[3] Zupan M, Hemker KJ, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 319, 810 (2001)

[4] Han CS, J. Kor. Soc. Heat Treat., 18(5), 281 (2005)

[5] Han CS, Koo KW, Korean J. Mater. Res., 18(1), 51 (2008)

[6] Li H, Li M, Wu Y, Zhou H, Wu X, Zhu Z, Li C, Xu L, Ji J, Hua Y, Su T, Ji C, Zhang W, Intermetallics, 28, 156 (2012)

[7] El-Chaikh A, Heckel TK, Christ HJ, Int. J. Fatigue, 53, 26 (2013)

[8] Li Z, Qi L, Huang X, Cao C, J. Aero. Mater., 26, 66 (2006)

[9] Tetsui T, Kobayashi T, Harada H, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 552, 345 (2012)

[10] Yankov RA, Kolitsch A, Borany J, Mucklich A, Munnik F, Donchev A, Schutze M, Surf. Coat. Technol., 206, 3595 (2012)

[11] Brotzu A, Felli F, Pilone D, Intermetallics, 54, 176 (2014)

[12] Fujiwara T, Nakamura A, Hosomi M, Nishitani SR, Shirai Y, Yamaguchi M, Philos. Mag., 61, 591 (1990)

[13] McCullough C, Valencia JJ, Levi CG, Mehrabian R, Acta Metall., 37, 1321 (1989)

[14] Jabbar H, Couret A, Durand L, Monchoux JP, J. Alloy. Compd., 509, 9826 (2011)

[15] Wang G, Xu L, Tian Y, Zheng Z, Cui Y, Yang R, Mater. Sci. Eng., 528(22-23), 6754 (2011)

[16] Yamaguchi M, Kishida K, Kobayashi M, Inui H, Kawasaki M, Ibe K, Philos. Mag. A, 74, 451 (1996)

[17] Pascoe RT, Newey CWA, Phys. Status Solidi A-Appl. Res., 29, 357 (1968)

[18] Maki M, Tamura I, Tetsu-to-Hagnne, 706, 2073 (1984)

[19] Ouchi K, Iijima Y, Hirano K, in Proceedings of the 4th International Conference on Titanium (Kyoto, Japan, May 1980). ed. Kimura H, Izumi O (Titanium'80 Science and Technology, AIME) p.559

[20] Sprengel W, Nakajima H, Oikawa H, Mater. Sci. Eng., 213, 45 (1996)

[21] Sakai T, Oohashi M, Tetsu-to-Hagane, 67, 2000 (1981)