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Orientation and structure of planar facets on the massive phase γ m in a near-TiAl alloy

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Abstract

The orientation and structure of planar facets on the γ m massive phase formed in a Ti-46.5 at. pct Al alloy have been characterized using a combination of transmission electron microscopy (TEM) and electron diffraction. The planar γ m /α 2 interfaces are irrational with respect to both the α 2 matrix phase and the γ m phase, and there is neither evidence of a rational orientation relationship across such facets, nor resolution of a linear defect structure within the interface planes in conventional electron diffraction patterns and amplitude-contrast images, respectively. However, when imaged parallel to a particular direction in the interface, these irrationally oriented interfaces are invariably parallel to the Moiré plane, which is defined by the intersection between two sets of closely-packed planes in the γ m and α 2 phases. The relationship is such that there is an effective continuity of these lattice planes across the interface and a one-dimensional coherency within the planar interface. This is interpreted to imply that such interface facets adopt a configuration of reduced energy and that they are not random and fully incoherent, as often described. It is suggested that these planar facets may migrate in a glissile manner normal to the interface plane by nucleation and rapid lateral movement within the interface plane of interfacial defects that have the form of Moiré ledges, which are defined by the spacing of the Moiré pattern that may be formed by overlap of the relevant crystal planes across the interface.

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References

  1. T.B. Massalski: Acta Metall., 1958, vol. 6, pp. 243–53.

    Article  CAS  Google Scholar 

  2. H.I. Aaronson: in The Decomposition of Austenite by Diffusional Processes, V.F. Zackay and H.I. Aaronson, eds., Interscience, New York, NY, 1962, pp. 387–548.

    Google Scholar 

  3. H.I. Aaronson, C. Laird, and K.R. Kinsman: Scripta Metall., 1968, vol. 2, pp. 259–64.

    Article  CAS  Google Scholar 

  4. D.A. Karlyn, J.W. Cahn, and M. Cohen: Trans. TMS-AIME, 1969, vol. 245, pp. 197–207.

    CAS  Google Scholar 

  5. T.B. Massalski: in Phase Transformations, H.I. Aaronson, ed., ASM, Metals Park, OH, 1970, pp. 433–86.

    Google Scholar 

  6. M.R. Plichta, W.A.T. Clark, and H.I. Aaronson: Metall. Trans. A, 1984, vol. 15A, pp. 427–35.

    CAS  Google Scholar 

  7. T.B. Massalski: Metall. Trans. A, 1984, vol. 15A, pp. 421–5.

    CAS  Google Scholar 

  8. J.H. Perepezko: Metall. Trans. A, 1984, vol. 15A, pp. 437–47.

    CAS  Google Scholar 

  9. A. Borgenstam and M. Hillert: Acta Mater., 2000, vol. 48, pp. 2765–75.

    Article  CAS  Google Scholar 

  10. Y. Mou and H.I. Aaronson: Acta Mater., 1994, vol. 42, pp. 2159–73.

    Article  CAS  Google Scholar 

  11. H.I. Aaronson and V.K. Vasudevan, eds., Metall. Mater. Trans. A, 2002, vol. 33A, pp. 2445–70.

  12. P. Wang, G.B. Viswanathan, and V.K. Vasudevan: Metall. Trans. A, 1992, vol. 23A, pp. 690–7.

    CAS  Google Scholar 

  13. W.G. Burgers: Physica, 1934, vol. 1, p. 561.

    Article  CAS  Google Scholar 

  14. D.I. Potter: J. Less-Common Met., 1973, vol. 31, p. 299.

    Article  CAS  Google Scholar 

  15. A. Denquin and S. Naka: Acta Mater., 1996, vol. 44, pp. 353–65.

    Article  CAS  Google Scholar 

  16. X.D. Zhang, S. Godfrey, M. Weaver, M. Strangwood, P. Threadgill, M.J. Kaufman, and M.H. Loretto: Acta Metall., 1996, vol. 44, pp. 3723–34.

    CAS  Google Scholar 

  17. X.D. Zhang, Y.G. Li, M.J. Kaufman, and M.H. Loretto: Acta Mater., 1996, vol. 44, pp. 3735–47.

    Article  CAS  Google Scholar 

  18. P. Wang, M. Kumar, D. Veeraraghavan, and V.K. Vasudevan: Acta Mater., 1998, vol. 46, pp. 13–30.

    Article  CAS  Google Scholar 

  19. A. Denquin and S. Naka: Acta Mater., 1996, vol. 44, pp. 343–52.

    Article  CAS  Google Scholar 

  20. J.F. Nie, B.C. Muddle, T. Furuhara, and H.I. Aaronson: Scripta Mater., 1998, vol. 39, pp. 637–45.

    Article  CAS  Google Scholar 

  21. D. Veeraraghavan, P. Wang, and V.K. Vasudevan: Acta Mater., 1999, vol. 47, pp. 3313–30.

    Article  CAS  Google Scholar 

  22. H.I. Aaronson, P. Wang, D.J. Michel, C.R. Feng, and V.K. Vasudevan: Proc. Int. Conf. on Solid-Solid Phase Transformations, W.C. Johnson, J.M. Howe, D.E. Laughlin, and W.A. Soffa, eds., TMS, Warrendale, PA, 1994, pp. 505–10.

    Google Scholar 

  23. A. Denquin and S. Naka: Phil. Mag. Lett., 1993, vol. 68, pp. 13–20.

    CAS  Google Scholar 

  24. P. Wang, M. Kumar, and V.K. Vasudevan: Phil. Mag. A, 2000, vol. 80, pp. 185–99.

    Article  CAS  Google Scholar 

  25. R.W. Balluffi, A. Brokman, and A.H. King: Acta Metall., 1982, vol. 30, pp. 1453–70.

    Article  CAS  Google Scholar 

  26. C.T. Forwood and L.M. Clarebrough: Electron Microscopy of Interfaces in Metals and Alloys, Adam Hilger IOP, Bristol, United Kingdom, 1991.

    Google Scholar 

  27. A.P. Sutton and R.W. Balluffi: Interfaces in Crystalline Materials, Oxford University Press, Oxford, United Kingdom, 1996.

    Google Scholar 

  28. M.G. Hall, H.I. Aaronson, and K.R. Kinsman: Surf. Sci., 1972, vol. 31, pp. 257–74.

    Article  CAS  Google Scholar 

  29. J.M. Rigsbee and H.I. Aaronson: Acta Metall., 1979, vol., 27, pp. 351–64.

    Article  CAS  Google Scholar 

  30. H.I. Aaronson: Metall. Trans. A, 1993, vol. 24A, pp. 241–76.

    CAS  Google Scholar 

  31. U. Dahmen: Acta Metall., 1982, vol. 30, pp. 63–73.

    Article  CAS  Google Scholar 

  32. U. Dahmen: Scripta Metall., 1987, vol. 21, pp. 1029–34.

    Article  CAS  Google Scholar 

  33. U. Dahmen: Metall. Mater. Trans. A, 1994, vol. 25A, pp. 1857–63.

    CAS  Google Scholar 

  34. J.M. Howe and D.A. Smith: Acta Mater., 1992, vol. 40, pp. 2343–50.

    Article  CAS  Google Scholar 

  35. B.C. Muddle, J.F. Nie, and G.R. Hugo: Metall. Mater. Trans. A, 1994, vol. 25A, pp. 1841–56.

    CAS  Google Scholar 

  36. J.F. Nie and B.C. Muddle: Mater. Forum, 1999, vol. 23, pp. 23–40.

    CAS  Google Scholar 

  37. B.C. Muddle and J.F. Nie: Proc. Int. Conf. on Solid-Solid Phase Transformations, M. Koiwa, K. Otsuka, and T. Miyazaki, eds., The Japan Institute of Metals, Tokyo, 1999, pp. 1128–35.

    Google Scholar 

  38. J.F. Nie and B.C. Muddle: Acta Mater., 2000, vol. 48, pp. 1691–703.

    Article  CAS  Google Scholar 

  39. S.Q. Xiao and J.M. Howe: Acta Mater., 2000, vol. 48, pp. 3253–60.

    Article  CAS  Google Scholar 

  40. J.P. Hirth: J. Chem. Phys. Solids, 1994, vol. 55A, p. 985.

    Article  Google Scholar 

  41. J.P. Hirth and R.C. Pond: Acta Mater., 1996, vol. 44, pp. 4749–63.

    Article  CAS  Google Scholar 

  42. P.M. Kelly and M.X. Zhang: Mater. Forum, 1999, vol. 23, pp. 41–62.

    CAS  Google Scholar 

  43. M.X. Zhang and P.M. Kelly: Acta Mater., 1998, vol. 46, pp. 4617–28.

    Article  CAS  Google Scholar 

  44. W.Z. Zhang and G.R. Purdy: Phil. Mag. A, 1993, vol. 68, pp. 279–90.

    Google Scholar 

  45. G.C. Weatherly and W.Z. Zhang: Metall. Mater. Trans. A, 1994, vol. 25A, pp. 1865–74.

    CAS  Google Scholar 

  46. G.R. Purdy and W.Z. Zhang: Metall. Mater. Trans. A, 1994, vol. 25A, pp. 1875–83.

    CAS  Google Scholar 

  47. W.Z. Zhang: Proc. Int. Conf. on Solid-Solid Phase Transformations, M. Koiwa, K. Otsuka, and T. Miyazaki, eds., The Japan Institute of Metals, Tokyo, 1999, pp. 581–4.

    Google Scholar 

  48. W.Z. Zhang, F. Ye, C. Zhang, Y. Qi, and H.S. Fang: Acta Mater., 2000, vol. 48, pp. 2209–19.

    Article  CAS  Google Scholar 

  49. U. Dahmem: Ultramicroscopy, 1989, vol. 30, pp. 102–15.

    Article  Google Scholar 

  50. C.P. Luo and U. Dahmen: Acta Mater., 1998, vol. 46, pp. 2063–81.

    Article  CAS  Google Scholar 

  51. T. Fujii, H. Nakazawa, M. Kato, and U. Dahmen: Acta Mater., 2000, vol. 48, pp. 1033–45.

    Article  CAS  Google Scholar 

  52. D. Duly, W.Z. Zhang, and M. Audier: Phil. Mag. A, 1995, vol. 71, pp. 187–204.

    CAS  Google Scholar 

  53. J.F. Nie, X.L. Xiao, C.P. Luo, and B.C. Muddle: Micron, 2001, vol. 32, pp. 857–63.

    Article  CAS  Google Scholar 

  54. D.H. Warrington: Grain Boundary Structure and Kinetics, ASM, Metals Park, OH, 1980, pp. 1–12.

    Google Scholar 

  55. J.M. Howe, H.I. Aaronson, and J.P. Hirth: Acta Mater., 2000, vol. 48, pp. 3977–84.

    Article  CAS  Google Scholar 

  56. D.H. Warrington and M. Boon: Acta Metall., 1975, vol. 23, pp. 599–607.

    Article  Google Scholar 

  57. R. Schindler, J.E. Clemans, and R.W. Balluffi: Phys. Status Solidi A, 1979, vol. 56, pp. 749–61.

    Article  CAS  Google Scholar 

  58. H.I. Aaronson, J.M. Howe, M.G. Hall, T. Furuhara, and J.P. Hirth: Scripta Mater., 1997, vol. 37, pp. 1301–7.

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. the School of Physics and Materials Engineering, Monash University, 3800, Victoria, Australia

    J. F. Nie (Senior Lecturer) & B. C. Muddle (Professor and Head)

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  1. J. F. Nie
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  2. B. C. Muddle
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Additional information

This article is based on a presentation made at the symposium entitled “The Mechanisms of the Massive Transformation,” a part of the Fall 2000 TMS Meeting held October 16–19, 2000, in St. Louis, Missouri, under the auspices of the ASM Phase Transformations Committee.

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Nie, J.F., Muddle, B.C. Orientation and structure of planar facets on the massive phase γ m in a near-TiAl alloy. Metall Mater Trans A 33, 2381–2389 (2002). https://doi.org/10.1007/s11661-002-0361-5

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