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On the decomposition of β phase in some rapidly quenched titanium-eutectoid alloys

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Abstract

The decomposition of the β phase in rapidly quenched Ti-2.8 at. pct Co, Ti-5.4 at. pct Ni, Ti-4.5 at. pct, and 5.5 at. pct Cu alloys has been investigated by electron microscopy. During rapid quenching, two compctitive phase transformations, namely martensitic and eutectoid transformation, have occurred, and the region of eutectoid transformation is extended due to the high cooling rates involved. The β phase decomposed into nonlamellar eutectoid product (bainite) having a globular morphology in Ti-2.8 pct Co and Ti-4.5 pct Cu (hypoeutectoid) alloys. In the near-eutectoid Ti-5.5 pct Cu alloy, the decomposition occurred by a lamellar (pearlite) type, whereas in Ti-5.4 pct Ni (hypereutectoid), both morphologies were observed. The interfaces between the proeutectoid α and the intermetallic compound in the nonlamellar type as well as between the proeutectoid α and the pearlite were often found to be partially coherent. These findings are in agreement with the Lee and Aaronson model proposed recently for the evolution of bainite and pearlite structures during the solid-state transformations of some titanium-eutectoid alloys. The evolution of the Ti2Cu phase during rapid quenching involved the formation of a metastable phase closely related to an “ω-type” phase before the equilibrium phase formed. Further, the lamellar intermetallic compound Ti2Cu was found to evolve by a sympathetic nucleation process. Evidence is established for the sympathetic nucleation of the proeutectoid a crystals formed during rapid quenching.

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References

  1. F.H. Froes and J.R. Pickens:J. Met., 1984, vol. 36 (1), pp. 14–28.

    CAS  Google Scholar 

  2. F.H. Froes and R.G. Rowe: inRapidly Solidified Alloys and Their Mechanical & Magnetic Properties, B.C. Giessen, D.E. Polk, and A.I. Taub, eds., Materials Research Society, Pittsburgh, PA, 1986, vol. 58, pp. 309–34.

    Google Scholar 

  3. S.M.L. Sastry, P.J. Meschter, and J.E. O'Neal:Metall. Trans. A, 1984, vol. 15A, pp. 1451–63.

    CAS  Google Scholar 

  4. S.H. Whang:J. Met., 1984, vol. 36 (4), pp. 34–40.

    CAS  Google Scholar 

  5. S.M.L. Sastry, T.C. Peng, and J.E. O'Neal:Titanium Science and Technology, Proc. 5th Int. Conf. on Titanium, Munich, Germany, 1984, G. Lütjering, U. Zwicker, and W. Bunk, eds., Deutsche Gesellschaft für Metallkunde e.V, Oberursel, Germany, 1985, pp. 397–404.

    Google Scholar 

  6. R.G. Rowe, JA. Sutliff, and E.F. Koch: inTitanium Rapid Solidification Technology, F.H. Froes and D. Eylon, eds., TMS- AIME, Warrendale, PA, 1986, pp. 239–48.

    Google Scholar 

  7. R.G. Rowe and E.F. Koch: inRapidly Solidified Alloys and Their Mechanical and Magnetic Properties, B.C. Giessen, D.E. Polk, and A.I. Taub, eds., Materials Research Society, Pittsburgh, PA, 1986, vol. 58, pp. 359–64.

    Google Scholar 

  8. J.A. Sutliff and R.G. Rowe: inRapidly Solidified Alloys and Their Mechanical and Magnetic Properties, B.C. Giessen, D.E. Polk, and A.I. Taub, eds., Materials Research Society, Pittsburgh, PA, 1986, vol. 58, pp. 371–76.

    Google Scholar 

  9. S. Krishnamurthy, R.G. Vogt, D. Eylon, and F.H. Froes: inRapidly Solidified Metastable Materials, B.H. Kear and B.C. Giessen, eds., Materials Research Society, Pittsburgh, PA, 1984, vol. 28, pp. 361–66.

    Google Scholar 

  10. T.A. Bhaskaran, R. Seshadri, R.V. Krishnan, and S. Ranganathan:Mater. Sci. Eng., 1988, vol. 98, pp. 251–55.

    Article  CAS  Google Scholar 

  11. C. Suryanarayana, F.H. Froes, and R.G. Rowe:Int. Mater. Rev., 1991, vol. 36 (3), pp. 85–123.

    CAS  Google Scholar 

  12. T.A. Bhaskaran:Int. J. Rapid Solid., 1992, vol. 7, pp. 127–49.

    CAS  Google Scholar 

  13. G.W. Franti, J.C. Williams, and H.I. Aaronson:Metall. Trans. A, 1978, vol. 9A, pp. 1641–49.

    CAS  Google Scholar 

  14. H.J. Lee and H.I. Aaronson:J. Mater. Sci., 1988, vol. 23, pp. 150–60.

    Article  CAS  Google Scholar 

  15. H.J. Lee and H.I. Aaronson:Acta Metall., 1988, vol. 36, pp. 1141–53.

    Article  CAS  Google Scholar 

  16. H.J. Lee, G. Spanos, G.J. Shiflet, and H.I. Aaronson:Acta Metall., 1988, vol. 36, pp. 1129–40.

    Article  CAS  Google Scholar 

  17. T. Furuhara, H.J. Lee, E.S.K. Menon, and H.I. Aaronson:Metall. Trans. A, 1990, vol. 21A, pp. 1627–43.

    CAS  Google Scholar 

  18. J.L. Murray: inPhase Diagrams of Binary Titanium Alloys, ASM, Metals Park, OH, 1987.

    Google Scholar 

  19. T.A. Bhaskaran: Ph.D. Thesis, Indian Institute of Science, Bangalore, India, 1990.

    Google Scholar 

  20. E.S.K. Menon and H.I. Aaronson:Acta Metall., 1987, vol. 35, pp. 549–63.

    Article  CAS  Google Scholar 

  21. H.I. Aaronson and C. Wells:Trans. TMS-AIME, 1956, vol. 206, p. 1216.

    Google Scholar 

  22. H.I. Aaronson, C. Laird, and K.R. Kinsman:Phase Transformations, ASM, Metals Park, OH, 1970, pp. 313–96.

    Google Scholar 

  23. S. Krishnamurthy, A.G. Jackson, H. Jones, and F.H. Froes:Metall. Trans. A, 1988, vol. 19A, pp. 23–33.

    CAS  Google Scholar 

  24. E.K. Molchanova:Phase Diagrams of Titanium Alloys, Israel Program for Scientific Translations, Jerusalem, Israel 1965, p. 93.

    Google Scholar 

  25. M. Hansen:Constitution of Binary Alloys, McGraw-Hill Book Co., Inc., New York, NY, 1958, p. 1050.

    Google Scholar 

  26. H. Margolin, E. Ence, and J.P. Nielsen:Trans. AIME, 1953, vol. 197, pp. 243–47.

    Google Scholar 

  27. J.R. Long:Met. Progr., 1949, vol. 25, pp. 364–65.

    Google Scholar 

  28. CM. Craighead, F. Fawn, and L.W. Eastwood:Second Progress Report, Contract No. AF33(038)-3736, Battelle Memorial Institute, Columbus, OH, 1949.

    Google Scholar 

  29. J.C. Williams, R. Taggart, and D.H. Polonis:Metall. Trans., 1971, vol. 2, pp. 1139–48.

    CAS  Google Scholar 

  30. S. Banerjee and R.W. Cahn:Acta Metall., 1983, vol. 31, pp. 1721–35.

    Article  CAS  Google Scholar 

  31. H.J. Lee and H.I. Aaronson:Acta Metall., 1988, vol. 36, pp. 1155–64.

    Article  CAS  Google Scholar 

  32. J. Christian:The Theory of Transformations in Metals and Alloys, Pergamon Press, Oxford, United Kingdom, 1965, p. 670.

    Google Scholar 

  33. A. Prince:Alloy Phase Equilibria, Elsevier, New York, 1966.

    Google Scholar 

  34. S.H. Whang: inUndercooled Alloy Phases, E.W. Collings and C.C. Koch, eds., TMS-AIME, Warrendale, PA, 1986, pp. 163–83.

    Google Scholar 

  35. H.I. Aaronson: inDecomposition of Austenite by Diffusional Processes, V.F. Zackay and H.I. Aaronson, eds., Interscience, New York, NY, 1962, p. 387.

    Google Scholar 

  36. C.A. Dube: Ph.D. Thesis, Carnegie Institute of Technology, Pittsburgh, PA, 1948.

    Google Scholar 

  37. R.W. Heckel and H.W. Paxton:Trans. ASM, 1961, vol. 53, p. 539.

    CAS  Google Scholar 

  38. R.A. Ricks, P.R. Howell, and G.S. Barritle:J. Mater. Sci., 1982, vol. 17, pp. 732–40.

    Article  CAS  Google Scholar 

  39. J.A. Street, H.I. Aaronson, and C.W. Spencer:J. Inst. Met., 1959-60, vol. 88, p. 381.

    Google Scholar 

  40. M. Unnikrishnan, E.S.K. Menon, and S. Banerjee:J. Mater. Sci., 1978, vol. 13, pp. 1401–10.

    Article  CAS  Google Scholar 

  41. E.S.K. Menon and R. Krishnan:J. Mater. Sci., 1983, vol. 18, pp. 375–82.

    Article  CAS  Google Scholar 

  42. P.G. Shewmon:Trans. TMS-AIME, 1965, vol. 233, p. 736.

    CAS  Google Scholar 

  43. 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 CM. Wayman, eds., TMS-AIME, Warrendale, PA, 1982, pp. 371–97.

    Google Scholar 

  44. M. Hillert: inDecomposition of Austenite by Diffusional Processes, V.F. Zackay and H.I. Aaronson, eds., Interscience, New York, NY, 1962, p. 197.

    Google Scholar 

  45. T.P. Diebold, H.I. Aaronson, and G.W. Franti:Metall. Trans. A, 1978, vol. 9A, pp. 1339–41.

    CAS  Google Scholar 

  46. S.A. Hackney and G.J. Shiflet:Scripta Metall., 1985, vol. 19, pp. 757–62.

    Article  CAS  Google Scholar 

  47. S.A. Hackney and G.J. Shiflet:Acta Metall., 1987, vol. 35, pp. 1007–28.

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Materials Science Division, National Aerospace Laboratories, 560 017, Bangalore, India

    T. A. Bhaskaran (Scientist) & R. V. Krishnan (Scientist)

  2. Centre for Advanced Study, Department of Metallurgy, Indian Institute of Science, 560 012, Bangalore, India

    S. Ranganathan (Professor)

Authors
  1. T. A. Bhaskaran
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  2. R. V. Krishnan
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  3. S. Ranganathan
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Bhaskaran, T.A., Krishnan, R.V. & Ranganathan, S. On the decomposition of β phase in some rapidly quenched titanium-eutectoid alloys. Metall Mater Trans A 26, 1367–1377 (1995). https://doi.org/10.1007/BF02647587

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  • DOI: https://doi.org/10.1007/BF02647587

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