Abstract
Isothermal oxidation behavior of Ti-48.6 at. pct Al alloy was studied in pure dry oxygen over the temperature range 850 °C to 1000 °C. The oxidation was essentially parabolic at all temperatures with significant increase in the rate at 1000 °C. Effective activation energy of 404 kJ/mol was deduced. The oxidation products were a mixture of TiO2 (rutile) and α-Al2O3 at all temperatures. An external protective layer of alumina was not observed on this alloy at any of the temperatures studied. A layered structure of oxides was formed on the alloy at 1000 °C.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
S.G. Kumar and R.G. Reddy: Metall. Mater. Trans. A, 1996, vol. 27A, pp. 1121–26.
S.G. Kumar, R.G. Reddy, J. Wu, and J. Holthus: J. Mater. Eng. Perf., 1995, vol. 4 (1), pp. 63–69.
S.G. Kumar, R.G. Reddy, and L. Brewer: J. Phase Equil., 1994, vol. 15 (3), pp. 279–84.
S.G. Kumar and R.G. Reddy: Proc. Int. Symp. on Synthesis/Processing of Lightweight Metallic Materials, TMS, Warrendale, PA, 1995, pp. 129–39.
N. Birks, G.H. Meier, and F.S. Pettit: JOM, 1994, vol. 46, pp. 42–46.
J. Subrahmanyam: J. Mater. Sci., 1989, vol. 23, pp. 1906–10.
J.L. Smialek: Corr. Sci., 1993, vol. 35 (5–8), pp. 1199–1208.
R.G. Reddy and X. Wen: EPD Congr. ’97, TMS, Warrendale, PA, 1997, pp. 47–54.
X. Wen and R.G. Reddy: Processing and Fabrication of Advanced Materials, TMS, Warrendale, PA, 1996, pp. 379–89.
G. Welsch and A.I. Kahveci: in Oxidation of High-Temperature Intermetallics, T. Grobstein and J. Doychak, eds., TMS, Cleveland, OH, 1998, pp. 207–18.
G.H. Meier, D. Appalonia, R.A. Perkins, and K.T. Chiang: Oxidation of High-Temperature Intermetallics, T. Grobstein and J. Doychak, eds., TMS, Cleveland, OH, 1988, pp. 185–93.
R.G. Reddy and R.B. Inturi: Min. Metall. Processing, 1999, vol. 16 (20), pp. 46–50.
J. Unnam, R.N. Shenoy, and R.K. Clark: Oxid. Met., 1986, vol. 26, pp. 231–52.
S. Becker, A. Rahmel, M. Schorr, and M. Schütze: Oxid. Met., 1992, vol. 38 (5–6), pp. 425–64.
A. Rahmel and P.J. Spencer: Oxid. Met., 1991, vol. 35, pp. 53–68.
S.A. Kekare and P.B. Aswath: J. Mater. Sci., 1997, vol. 32 (9), pp. 2485–99.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Reddy, R.G., Wen, X. & Divakar, M. Isothermal oxidation of TiAl alloy. Metall Mater Trans A 32, 2357–2361 (2001). https://doi.org/10.1007/s11661-001-0209-4
Received:
Issue Date:
DOI: https://doi.org/10.1007/s11661-001-0209-4