Influence of Microstructure Change on the Superplastic Properties of Ti3Al Base Alloy


Article Preview

The superplastic properties of Ti3Al base alloy have been investigated in the range of 900~1020°C and strain rate range of 3.3×10-4~3.3×10-2s-1 .The largest elongation of 1570% was obtained under the optimal superplastic deformation condition of 980°C and 3.3×10-4 s-1. The m-value varied from 0.46 to 0.59, its maximum value was obtained at 980°C.The microstructure of the alloy after heat treatment was composed of two phases of small spherical α2 phase particles distributing in βtransus matrix. Microstructure change has an obvious effect on the superplastic properties of Ti3Al-based alloy. At 980°C,when theα2 phase grain size changed from large to small then large and the cavitations in the fracture surface were larger and deeper with decreasing strain rate, the alloy showed the larger elongation and the lower flow stress.



Advanced Materials Research (Volumes 26-28)

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee




Y. Y. Liu et al., "Influence of Microstructure Change on the Superplastic Properties of Ti3Al Base Alloy", Advanced Materials Research, Vols. 26-28, pp. 177-180, 2007

Online since:

October 2007




[1] Lipsitt, H. A., Muter. Rot, Symp. Proc., 39 (1985) 351.

[2] Lipsitt, H. A., Shechtman, et al, Met. Trans., llA(1980)1369.

[3] Sastry, S. M. L. , Lipsitt , et al, Processing of the 4th International Conference on Titanium, Kyoto, 2(1980)1231.

[4] Teitel, E. I., Yakovleva, et al, Hrupkogo razrushenia. Ukr., Kiev, 1(1976)112.

[5] J.P. Wittenauer, C. Bassi, B. Walser, Scr. Metall, 23(1989)1381.

[6] Yang H.S., P. Jin, E. Daldev , et al, Scr Metall Mater, 25(1991)1223.

[7] N. Ridley, D.W. Livesey, M.T. Salehi, Proceedings of the International Conference on High Temperature Intermetallics, London, UK, 1991, 198.

[8] N. Ridley, M.F. Islam, J. Structural Intermetallics, The Minerals, Metalsand Materials Science Society, Warrendale, PA, 1993, 63.

[9] Bin Wang, T.C. Jia, Y.Q. Wang, et al, Acta Metall Sinica, 30(1994): B309.

[10] Sun Fushen, Ma Jimin, Cao Chunxiao, et al, Acta Metall Sinica, 30(1994) B465.

[11] D. Jobart, J. J. Blandin, Mater Sci Eng., A207(1996)170.

[12] D. Jobart, J. J. Blandin, Mater. Sci Eng., 31(1996)881.

[13] R. Imayev, N. Gabdullin, G. Salishcher, Intermetallics 5 (1997)229.

[14] H.C. Fu, J.C. Huang, T.D. Wang, et al, Acta Mater, 46(1998)465.

[15] J.H. Kim, C.G. Park, T.K. Ha, et al, Proc. 3rd Pacific Rim Int. Conf. Adv. Mater. Proc. (PRICM3), TMS, Warrendale, PA, 1998, p.1867.

[16] Jin Hong Kim, Chan Gyung Park, et al, Materials Science and Engineering, A269(1999)197.

[17] H. Ding, D. Song, C.B. , Zhang, et al, Materials Science and Engineering, A281(2000)248.

[18] Takasugi, T. and Rikukawa, et al, Acta Met., 40(1992)1895.

[19] Imayev, R. M. and Imayev, et al, Scripta. Met., 25(1991)(2041).