Fabrication of TiAl Alloy Powders by High-Energy Ball Milling and Low Temperature Sintering

Abstract:

Ti/Al(Ti-50at.%Al) composite powders were prepared by high-energy ball milling followed by reaction sintering heat treatment at 550°C ~ 650°C for 2 hours. Mechanical alloying of TiAl had been performed in a high energy plant ball after different milling times and pre-sintered at different temperatures. The particle sizes of Ti/Al powders were analyzed by scanning electron microscopy (SEM). X-ray diffraction (XRD) analysis was performed for microstructural characterization. The results show that microstructural and morphological changes of high energy milled powder are studied as a function of milling time. Over 600°C TiAl powders are completely alloyed by being sintered at different temperatures. The powders are mainly composed of γ-TiAl as well as a small amount of AlTi3. The TiAl alloy powders of high energy ball mill/2h and sintered at 650°C/2h get plasma spheroidization. Spheroidizing powders with fine texture, γ-TiAl and AlTi₃ phase, particle size of 10~40μm are obtained.

• Periodical: Advanced Materials Research (Volume 338)
• Pages: 60-64
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.338.60
• Online since: September 2011
• Authors: Xiao Ting Liu, Hui Ping Shao, Dong Hua Yang, Zhi Meng Guo, Ye Ji
• Keywords: Elemental Powders, High-Energy Ball Milling (HEM), Low Temperature Sintering, Plasma Spheroidization, TiAl Alloys

References

[1] P.A. Bartolotta, D.L. Krause, in: Titanium Aluminide Applications in the High Speed Civil Transport (1999), p.11.

[2] M. Nazmy, M. Staubli and G. Onofrio, V. Lupinc: Scripta Mater. Forum Vol. 45 (2001), p.787.

DOI: 10.1016/s1359-6462(01)01097-1

[3] D.M. Dimiduk: Mater. Sci. Eng. A. (1999), p.263:281.

[4] C.M. Austin: Curr. Opin. Solid. State. Mater. Sci. Forum Vol.4 (1999), p.239.

[5] R.A. Harding, M. Wickins, H. Wang, G. Djambazov and K.A. Pericleous: Inter. Forum Vol. 19 (2011), pp.805-813.

[6] M. Petrenec, J. Polák, P. Buček: Pro. Eng. Forum Vol.10 (2011), pp.1390-1395.

[7] G. Wang, L. Xu, Y.X. Tian, Z. Zheng, Y.Y. Cui and R. Yang: Mater. Sci. Eng. A. Forum Vol.528 (2011), pp.6754-6763.

[8] M. Beschliesser, A. Chatterjee and A. Lorich: Mater. Sci. Eng. A. Forum Vol.329-331 (2002), pp.124-129.

[9] Y. Wang, D.L. Lin, Y. Ian and Y.W. Kim: Trans. Nonterrous. Met. Soc. China. Suppl(1)9 (1999), pp.285-289.

[10] G.X. Wang, M. Dahms: Pow. Met. Inter. Forum Vol.24(4) (1992), p.219.

[11] P.I. Gouma, N. Saunders and M.H. Loretto: Mater. Sci. Techn. Forum Vol.12(10) (1996), p.823.

[12] L. Wang, Y. Liu, W. Zhang., H. Wang and Q. Li: Optimization of pack parameters for hot deformation of TiAl alloys. Inter. Forum Vol. 19 (2011), pp.68-74.

DOI: 10.1016/j.intermet.2010.09.011

[13] E.G. Kandalova, V.I. Nikitin, W.Q. Jie and A.G. Makarenko: Mater. Let. Forum Vol.54 (2002), pp.131-134.

[14] M.Yamaguchi, H. Inui and K. Ito: Acta. Mater. Forum Vol.48 (2000), p.307.

[15] W.J. Zhang, S.C. Deevi: Mater. Sci. Eng. A. Forum Vol.362 (2003), p.280.