Abstract
A gas-atomized (GA) prealloyed powder of the Ti-48Al-2Cr-2Nb intermetallic and 1.6 wt pct Y were mechanically alloyed (MA) and hot isostatically pressed (hipped) to produce a fully dense nanocrystalline material. Mechanical alloying of the as-blended powder for 16 hours resulted in the formation of a disordered fcc phase. Hipping of the alloy powder produced a single-phase nanocrystalline TiAl intermetallic, containing a distribution of 20 to 35-nm-sized Al2Y4O9 particles. The formation of oxide particles occurred by the chemical combination of Al and Y with oxygen, which entered as a contaminant during milling. Oxide particles increased the hardness of the intermetallic compound and minimized grain growth even at 0.8 T m , where T m is the melting point of the compound.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
F.H. Froes, C. Suryanarayana, and D. Eliezer: J. Mater. Sci., 1992, vol. 27, pp. 5113–40.
S. Naka, M. Thomas, and T. Khan: Mater. Sci. Technol., 1992, vol. 8, pp. 291–98.
D.M. Dimiduk, D.B. Miracle, and C.H. Ward: Mater. Sci. Technol., 1992, vol. 8, pp. 367–75.
H. Mabuchi, H. Tsuda, Y. Nakayama, and E. Sukedai: J. Mater. Res., 1992, vol. 7, pp. 894–900.
Y.-W. Kim and D.M. Dimiduk: Int. Symposium on Advanced Materials (ISAM)- International Conference on Engineering & Technological Sciences, (2000), Beijing, Oct. 11–13, 2000.
P.L. Threadgil and B. Wilshire: Met. Sci. J., 1974, vol. 8, pp. 117–24.
J.D. Parker and B. Wilshire: Met. Sci. J. 1975, vol. 9, pp. 248–52.
C.C. Koch: Ann. Rev. Mater. Sci., 1989, vol. 19, pp. 121–43.
C.C. Koch: Mater. Sci. Technol., 1991, vol. 15, pp. 193–245.
C. Suryanarayana and F.H. Froes: Mater. Sci. Forum, 1992, vols. 88–90, pp. 445–52.
P.H. Shingu, B. Huang, S.R. Nishitani, and S. Nasu: Trans. Jpn. Inst. Met., 1988, vol. 29, pp. 3–10.
F.H. Froes, C. Suryanarayana, G.H. Chen, A. Frefer, and G. Hyde: J. Mater. Sci., 1992, vol. 44, pp. 26–29.
C. Suryanarayana, C.R. Sundaresan, and F.H. Froes: Adv. Powder Metall., 1989, pp. 175–88.
E. Arzt: Res. Mech., 1991, vol. 31, pp. 399–453.
J. Rosler and E. Arzt: Acta Metall., 1980, vol. 71, pp. 671–83.
G.E. Dieter: Mechanical Metallurgy, 3rd ed., McGraw-Hill Book Company Ltd., London, 1988, pp. 212–19.
S. Naka, H. Octor, E. Bouchand, and T. Khan: Scripta Metall., 1989, vol. 23, pp. 501–05.
M. Raghaven, J.W. Steeds, and R. Petkovicluton: Metall. Mater. Trans. A, 1982, vol. 13A, pp. 953–57.
H. Bakker and L.M. Di: Mater. Sci. Forum, 1992, vols. 88–90, p. 27; Zener private communication to C.S. Smith: Trans. Am. Inst. Min. Eng. vol. 175, 1948, p. 47.
J.S.C. Jang and C.H. Tsau: J. Mater. Sci., 1993, vol. 28, pp. 982–88.
W. Guo, A. Iasonna, M. Magini, S. Martelli, and F. Padella: J. Mater. Sci., 1994, vol. 29, pp. 2436–44.
W. Guo, S. Martelli, F. Padella, M. Magini, N. Burgio, E. Paradiso, and U. Franzoni: Mater. Sci. Forum, 1992, vols. 88–90, pp. 139–46.
C.C. Koch: Mater. Sci. Forum, 1992, vols. 88–90, pp. 243–62.
H. Ogawa, K. Omuro, and H. Miura: Mater. Sci. Forum, 1995, vols. 179–181, pp. 781–86.
O.N. Senkov, N. Srisukhumbowornchai, L. Ovecoglu, and F.H. Froes: Scripta Mater., 1998, vol. 39, pp. 691–98.
M. Goncalves: Scripta Metall. Mater., 1991, vol. 25, pp. 835–40.
A. Waheed and G.W. Lorimer: J. Mater. Lett., 1997, vol. 16, pp. 1643–46.
F.H. Froes, C.M. Cooke, D. Eylon, and K.C. Russell: Titanium Sci. Technol., 1988, vol. 31.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Trivedi, P.B., Patankar, S.N., (Sam) Froes, F.H. et al. Grain-size control in Ti-48Al-2Cr-2Nb with yttrium additions. Metall Mater Trans A 33, 2729–2736 (2002). https://doi.org/10.1007/s11661-002-0395-8
Received:
Issue Date:
DOI: https://doi.org/10.1007/s11661-002-0395-8