Abstract
The crystallography of α(hcp) precipitates formed on the β(bcc) matrix grain boundaries has been studied with transmission electron microscopy (TEM) in a Ti-15V-3Cr-3Sn-3Al alloy. The α precipitates have a near-Burgers orientation relationship with respect to at least one of the adjacent β grains. Among the possible 12 variants in this orientation relationship, the variant that [11•20]α is parallel to the 〈111〉β closest to the grain boundary plane tends to be preferred by the α precipitates. Additionally, further variant selections are made so as to minimize the deviation of orientation relationship with respect to the “opposite“ β grain from the Burgers one. Such rules in variant selection often result in the formation of precipitates with a single variant at a planar grain boundary. Prior small deformation of β matrix changes the variant of α precipitates at the deformed portion of grain boundary. It is considered that the stress field of dislocations in the slip bands intersecting with the boundary strongly affects the variants of α precipitates. Discussion of these results is based upon a classical nucleation theory.
Similar content being viewed by others
References
C.S. Smith:Trans. ASM, 1953, vol. 45, pp. 533–75.
R.F. Mehl and O.T. Marzke:Trans. AIME, 1931, vol. 93, pp. 123- 61.
M. Hillert: inThe Decomposition of Austenite by Diffusional Processes, V.F. Zackey and H.I. Aaronson, eds., Interscience, New York, NY, 1962, pp. 197–548
P.L. Ryder and W. Pitsch:Acta Metall., 1966, vol. 14, pp. 1437–48.
P.L. Ryder, W. Pitsch, and R.F. Mehl:Acta Metall., 1967, vol. 15, pp. 1431–40.
D. Vaughan:Acta Metall., 1968, vol. 16, pp. 563–77.
D. Vaughan:Acta Metall., 1970, vol. 18, pp. 183–87.
A.D. King and T. Bell:Metall. Trans. A, 1975, vol. 6A, pp. 1419–29.
M.R. Plichta and H.I. Aaronson:Acta Metall., 1980, vol. 28, pp. 1041- 57.
J.K. Park and A.J. Ardell:Acta Metall., 1986, vol. 34, pp. 2399–2409.
K. Ameyama, T. Maki, and I. Tamura:J. Jpn. Inst. Met., 1986, vol. 50, pp. 602–11.
T. Furuhara and H.I. Aaronson:Acta Metall. Mater., 1991, vol. 39, pp. 2887–99.
J.K. Lee and H.I. Aaronson:Acta Metall., 1975, vol. 23, pp. 799–808.
J.K. Lee and H.I. Aaronson:Acta Metall., 1975, vol. 23, pp. 809–20.
K. Ameyama, M. Minagawa, T. Maki, and I. Tamura:Tetsu-to-Hagané, 1988, vol. 74, pp. 1839–45.
W.G. Burgers:Physica, 1934, vol. 1, pp. 561–86.
D. Banerjee, C.G. Shelton, B. Ralph, and J.C. Williams:Acta Metall., 1988, vol. 36, pp. 125–41.
H.I. Aaronson, W.B. Triplett, and G.M. Andes:Trans. AIME, 1957, vol. 209, pp. 1227–35.
T. Furuhara, H. Watanabe, T. Makino, and T. Maki:Proc. Int. Conf. on Solid-to-Solid Phase Transformations in Inorganic Materials (PTM94), W.C. Johnson, J.M. Howe, D.E. Laughlin, and W.A. Soffa, eds., TMS, Warrendale, PA, 1994, pp. 237–42
R.D. Townsend and J.S. Kirkaldy:Trans. ASM, 1968, vol. 61, pp. 605–19.
H.I. Aaronson, D. Eylon, C.M. Cooke, M. Enomoto, and F.H. Froes:Scripta Metall., 1989, vol. 23, pp. 435–40.
K. Ameyama, G.C. Weatherly, and K.T. Aust:Acta Metall. Mater., 1992, vol. 40, pp. 1835–46.
G. Spanos, R. Masumura, and M.G. Hall: Paper presented at TMS Symposium onAtomistic Mechanisms of Nucleation and Growth in Solids, Metall. Mater. Trans. A, 1996, vol. 27A, pp. 1517–32.
W.A.T. Clark, CE. Wise, Z. Shen, and R.H. Wagoner:Ultramicroscopy, 1989, vol. 30, pp. 76–89.
T.C. Lee, I.M. Robertson, and H.K. Birrnbaum:Metall. Trans. A, 1990, vol. 21A, pp. 2437–47.
T. Furuhara, H. Nakamori, S. Takagi, and T. Maki: inMetallurgy and Technology of Practical Titanium Alloys, S. Fujishiro, D. Eylon, and T. Kishi, eds., TMS, Warrendale, PA, 1994, pp. 173–80.
T. Furuhara, H. Nakamori, and T. Maki:Mater. Trans., JIM, 1992, vol. 33, pp. 585–95.
T. Furuhara, J.M. Howe, and H.I. Aaronson:Acta Metall. Mater., 1991, vol. 39, pp. 2873–86.
T. Furuhara, T. Ogawa, and T. Maki: Phil. Mag. Lett., 1995, in press.
H.I. Aaronson and K.C. Russell:Proc. Int. Conf. on Solid-Solid Phase Transformations, H.I. Aaronson, D.E. Laughlin, R.F. Sekerka, and C.M. Wayman, eds., TMS-AIME, Warrendale, PA, 1983, pp. 371–97.
T. Furuhara and T. Maki:Mater. Trans., JIM, 1992, vol. 33, pp. 734- 39.
Author information
Authors and Affiliations
Additional information
Formerly Graduate Student, Department of Materials Science and Engineering, Kyoto University
Formerly Graduate Student, Department of Materials Science and Engineering, Kyoto University
This article is based on a presentation made during TMS/ASM Materials Week in the symposium entitled “Atomistic Mechanisms of Nucleation and Growth in Solids,“ organized in honor of H.I. Aaronson’s 70th Anniversary and given October 3–5, 1994, in Rosemont, Illinois.
Rights and permissions
About this article
Cite this article
Furuhara, T., Takagi, S., Watanabe, H. et al. Crystallography of grain boundary α precipitates in a β titanium alloy. Metall Mater Trans A 27, 1635–1646 (1996). https://doi.org/10.1007/BF02649821
Issue Date:
DOI: https://doi.org/10.1007/BF02649821