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Metallurgical Transactions A

, Volume 22, Issue 6, pp 1367–1380 | Cite as

The role of ledges in the proeutectoid ferrite and proeutectoid cementite reactions in steel

  • G. Spanos
  • W. T. Reynolds
  • R. A. Vandermeer
The Role of Ledges in Phase Transformations

Abstract

The influence of interphase boundary ledges on the growth and morphology of proeutectoid ferrite and proeutectoid cementite precipitates in steel is examined. After reviewing current theoretical treatments of growth by the ledge mechanism, investigations that clearly document the presence and motion of ledges with thermionic emission electron microscopy (THEEM) and transmission electron microscopy (TEM) are reviewed. A fundamental distinction is made between two types of ledges: (1) mobile growth ledges whose lateral migration displaces the inter-phase boundary and (2) misfit-compensating structural ledges. Both types of ledges strongly affect the apparent habit plane and aspect ratio of precipitate plates. Agreement between measured growth rates of proeutectoid ferrite and cementite (plates and allotriomorphs) and predicted growth kinetics assuming volume diffusion-controlled migration of ledge-free disordered boundaries is shown to be consistently poor. Physically realistic growth models should incorporate the ledge mechanism. More accurate comparisons of the growth models with experimental data will need to account for observed ledge heights, interledge spacings, and ledge velocities. In this vein, the sluggish growth kinetics of cementite allotriomorphs observed in an Fe-C alloy are shown to be quantitatively consistent with a strong increase in interledge spacing with time.

Keywords

Ferrite Austenite Cementite Misfit Dislocation Ferrite Plate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J.W. Gibbs:The Scientific Papers of J. Willard Gibbs, Dover, NY, 1961, vol. 1, p. 325.Google Scholar
  2. 2.
    F.C. Frank:Discuss. FarActay Soc, 1949, vol. 5, pp. 48–54.CrossRefGoogle Scholar
  3. 4.
    A.A. Chernov:Sov. Phys. Usp., 1961, vol. 4, pp. 116–48.CrossRefGoogle Scholar
  4. 5.
    W.W. Mullins and J.P. Hirth:J. Phys. Chem. Solids, 1963, vol. 24, pp. 1391–1404.CrossRefGoogle Scholar
  5. 6.
    K.A. Jackson, D.R. Uhlmann, and J.D. Hunt:J. Cryst. Growth, 1967, vol 1, pp. 1–36.CrossRefGoogle Scholar
  6. 7.
    J.W. Cahn:Acta Metall., 1960, vol. 8, pp. 554–62.CrossRefGoogle Scholar
  7. 8.
    J.W. Cahn, W.B. Hillig, and G.W. Sears:Acta Metall., 1964, vol. 12, pp. 1421–39.CrossRefGoogle Scholar
  8. 9.
    H.I. Aaronson:The Decomposition of Austenite by Diffusional Processes, V.F. Zackay and H.I. Aaronson, eds., Interscience, New York, NY, 1962, pp. 387–546.Google Scholar
  9. 10.
    H.I. Aaronson:The Mechanism of Phase Transformations in Crystalline Solids, Institute of Metals, London, 1969, Monograph 39, pp. 270–81.Google Scholar
  10. 11.
    H.I. Aarsonson and H.J. Lee:Scripta Metall., 1987, vol. 21, pp. 1011–16.CrossRefGoogle Scholar
  11. 12.
    R.K.W. Honeycombe:Metall. Trans. A, 1976, vol. 7A, pp. 915–36.Google Scholar
  12. 13.
    R.K.W. Honeycombe:Phase Transformations in Ferrous Alloys, TMS-AIME, Warrendale, PA, 1984, pp. 259–80.Google Scholar
  13. 14.
    H.I. Aaronson, C. Laird, and K.R. Kinsman:Phase Transformations, ASM, Metals Park, OH, 1970, pp. 313–96.Google Scholar
  14. 15.
    R. Trivedi: Ph.D. Thesis, Carnegie Institute of Technology, Pittsburgh, PA, 1966.Google Scholar
  15. 16.
    C. Zener:Trans. AIME, 1946, vol. 167, pp. 550–95.Google Scholar
  16. 17.
    M. Hillert:Jernkontorets Ann., 1957, vol. 141, pp. 757–89.Google Scholar
  17. 18.
    G.J. Jones and R. Trivedi:J.Appl. Phys., 1971, vol. 42, pp. 4299–304.CrossRefGoogle Scholar
  18. 19.
    G.J. Jones and R. Trivedi:J. Cryst. Growth, 1975, vol. 29, pp. 156–66.CrossRefGoogle Scholar
  19. 20.
    C. Atkinson:Proc. R. Soc., 1981, vol. A378, pp. 351–68.Google Scholar
  20. 21.
    M. Enomoto, H.I. Aaronson, J. Avila, and C. Atkinson: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, 1982, pp. 567–71.Google Scholar
  21. 22.
    R. Trivedi: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, 1982, pp. 477–502.Google Scholar
  22. 23.
    C. Atkinson:Proc. R. Soc., 1982, vol. A384, pp. 107–33.Google Scholar
  23. 24.
    R.D. Doherty and B. Cantor: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, 1982, pp. 547–53.Google Scholar
  24. 25.
    M. Enomoto:Acta Metall., 1987, vol. 35, pp. 935–45.CrossRefGoogle Scholar
  25. 26.
    M. Enomoto:Acta Metall., 1987, vol. 35, pp. 947–56.CrossRefGoogle Scholar
  26. 27.
    C. Atkinson: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, 1982, p. 552.Google Scholar
  27. 28.
    M. Enomoto and H.I. Aaronson:Scripta Metall., 1989, vol. 23, pp. 1983–88.CrossRefGoogle Scholar
  28. 29.
    M. Enomoto and H.I. Aaronson:Scripta Metall., 1989, vol. 23, pp. 1995–96.CrossRefGoogle Scholar
  29. 30.
    R.D. Doherty and B. Cantor: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. 552–53.Google Scholar
  30. 31.
    R.D. Doherty and B. Cantor:Scripta Metall., 1988, vol. 23, pp. 1989–94.Google Scholar
  31. 32.
    W.T. Reynolds, Jr., M. Enomoto, and H.I. Aaronson:Phase Transformations in Ferrous Alloys, A.R. Marder and J. Goldstein, eds., TMS-AIME, Warrendale, PA, 1984, pp. 155–200.Google Scholar
  32. 33.
    K.R. Kinsman, E. Eichen, and H.I. Aaronson:Metall. Trans. A, 1975, vol. 6A, pp. 303–17.Google Scholar
  33. 34.
    E. Eichen, H.I. Aaronson, G.M. Pound, and R. Trivedi:Acta Metall., 1964, vol. 12, pp. 1298–1301.CrossRefGoogle Scholar
  34. 35.
    R.F. Hehemann, K.R. Kinsman, and H.I. Aaronson:Metall. Trans., 1972, vol. 3, pp. 1077–94.CrossRefGoogle Scholar
  35. 36.
    J.M. Rigsbee and H.I. Aaronson:Acta Metall., 1979, vol. 27, pp. 365–76.CrossRefGoogle Scholar
  36. 37.
    M.G. Hall, H.I. Aaronson, and K.R. Kinsman:Surf. sci., 1972, vol. 31, pp. 257–74.CrossRefGoogle Scholar
  37. 38.
    K.C. Russell, M.G. Hall, and H.I. Aaronson:Metall. Trans., 1974, vol. 5, pp. 1503–05.CrossRefGoogle Scholar
  38. 39.
    J.M. Rigsbee and H.I. Aaronson:Acta Metall., 1979, vol. 27, pp. 351–63.CrossRefGoogle Scholar
  39. 40.
    J.M. Rigsbee, E.S.K. Menon, H.J. Lee, and H.I. Aaronson:Scripta Metall., 1983, vol. 17, pp. 1465–73.CrossRefGoogle Scholar
  40. 41.
    H.I. Aaronson, T. Furuhara, J.M. Rigsbee, W.T. Reynolds, Jr., and J.M. Howe:Metall. Trans. A, 1991, vol. 22A, pp. 2369–2409.Google Scholar
  41. 42.
    K.W. Westmacott and U. Dahmen:Rev. Phys. Appl., 1986, vol. 21, pp. 757–73.Google Scholar
  42. 43.
    C. Li, V. Perovic, and G.R. Purdy:Phase Transformations 87, G.W. Lorimer, ed., Institute of Metals, London, 1988, pp. 326–29.Google Scholar
  43. 44.
    M. Nemoto:High Voltage Electron Microscopy, P.R. Swann, C.J. Humphries, and M.J. Goringe, eds., Academic Press, London, 1974, pp. 230–34.Google Scholar
  44. 45.
    G.R. Purdy:Acta Metall., 1978, vol. 26, pp. 477–86.CrossRefGoogle Scholar
  45. 46.
    G.R. Purdy:Acta Metall., 1978, vol. 26, pp. 487–98.CrossRefGoogle Scholar
  46. 47.
    G.R. Purdy:Scripta Metall., 1978, vol. 21, pp. 1035–38.Google Scholar
  47. 48.
    P.R. Howell, P.D. Southwick, and R.W.K. Honeycombe:J. Microsc., 1979, vol. 116, pp. 151–58.Google Scholar
  48. 49.
    P.R. Howell, P.D. Southwick, R.C. Ecob, and R.A. Ricks:Proc. Int. Conf. on Solid-Solid Phase Transformations, H.I. Aaronson, D.E. Laughlin, R.F. Sekerka, and C.M. Wayman, eds., TMS-AIME, Wanendale, PA, 1982, pp. 591–95.Google Scholar
  49. 50.
    P.E. Donovan and W.M. Stobbs:J. Microsc., 1983, vol. 130, pp. 361–76.Google Scholar
  50. 51.
    L. Kaufman, S.V. Radcliffe, and M. Cohen:The Decomposition of Austenite by Diffusional Processes, V.F. Zackay and H.I. Aaronson, eds., Interscience, New York, NY, 1962, pp. 313–52.Google Scholar
  51. 52.
    M. Hillert: unpublished research, cited in Ref. 51, 1962.Google Scholar
  52. 53.
    G.R. Speich and M. Cohen:Trans. AIME, 1960, vol. 218, pp. 1050–59.Google Scholar
  53. 54.
    H.W. Paxton and G.M. Pound:Trans. AIME, 1963, vol. 227, pp. 957–60.Google Scholar
  54. 55.
    R.D. Townsend and J.S. Kirkaldy:Trans. ASM, 1968, vol. 61, pp. 605–19.Google Scholar
  55. 56.
    A.T. Davenport: Republic Steel Corporation, Independence, OH, private communication, cited in Ref. 57, 1971.Google Scholar
  56. 57.
    E.P. Simonen, H.I. Aaronson, and R. Trivedi:Metall. Trans., 1973, vol. 4, pp. 1239–45.CrossRefGoogle Scholar
  57. 58.
    J.R. Bradley, J.M. Rigsbee, and H.I. Aaronson:Metall. Trans. A, 1977, vol. 8A, pp. 323–33.Google Scholar
  58. 59.
    W.F. Lange, III, M. Enomoto, and H.I. Aaronson:Metall. Trans. A, 1988, vol. 19A, pp. 427–40.Google Scholar
  59. 60.
    R.F. Mehl, C.S. Barrett, and D.W. Smith:Trans. AIME, 1933, vol. 105, pp. 215–18.Google Scholar
  60. 61.
    A.B. Greninger and R. Troiano:Trans. AIME, 1940, vol. 140, pp. 307–31.Google Scholar
  61. 62.
    R.W. Heckel, J.H. Smith, and H.W. Paxton:Trans. AIME, 1960, vol. 218, pp. 566–68.Google Scholar
  62. 63.
    S.A. Cowley and D.V. Edmonds:Phase Transformations 87, G.W. Lorimer, ed., Institute of Metals, London, 1988, pp. 459–61.Google Scholar
  63. 64.
    G. Spanos and H.I. Aaronson:Scripta Metall., 1988, vol. 22, pp. 1537–42.CrossRefGoogle Scholar
  64. 65.
    G. Spanos and H.I. Aaronson:Acta Metall., 1990, vol. 38, pp. 2721–32.CrossRefGoogle Scholar
  65. 66.
    W. Pitsch:Acta Metall., 1962, vol. 10, pp. 897–900.CrossRefGoogle Scholar
  66. 67.
    W. Pitsch: Arch. Eisenhuettenwes., 1963, vol. 381–90.Google Scholar
  67. 68.
    H.I. Aaronson and C. Wells:Trans. AIME, 1956, vol. 206, pp. 1216–23.Google Scholar
  68. 69.
    E.S.K. Menon and H.I. Aaronson:Acta Metall., 1987, vol. 35, pp. 549–63.CrossRefGoogle Scholar
  69. 70.
    T. Andoand G. Krauss:Acta Metall., 1981, vol. 29, pp. 351–63CrossRefGoogle Scholar
  70. 71.
    R.W. Heckel and H.W. Paxton:Trans. AIME, 1960, vol. 218, pp. 799–806.Google Scholar
  71. 72.
    W.P. Bosze and R. Trivedi:Acta Metall., 1975, vol. 23, pp. 713–22.CrossRefGoogle Scholar
  72. 73.
    R. Trivedi:Metall. Trans., 1970, vol. 1, pp. 921–27.Google Scholar
  73. 74.
    R. Trivedi and G.M. Pound:J.Appl. Phys., 1967, vol. 38, pp. 3569–76.CrossRefGoogle Scholar
  74. 75.
    W.S. Owen:J. Iron Steel Inst., 1951, vol. 167, pp. 117–20.Google Scholar
  75. 76.
    S.K. Liu, W.T. Reynolds, Jr., H. Hu, G.J. Shiflet, and H.I. Aoronson:Metall. Trans. A, 1985, vol. 16A, pp. 457–68.Google Scholar
  76. 77.
    T. Tanaka and H.I. Aaronson: Carnegie Mellon University, Pittsburgh, PA, unpublished research, 1984.Google Scholar
  77. 78.
    G. Chen and H.I. Aaronson: Carnegie Mellon University, Pittsburgh, PA, unpublished research, 1989.Google Scholar
  78. 79.
    T. Ando and G. Krauss: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. 573–77.Google Scholar
  79. 80.
    R.A. Vandermeer: Naval Research Laboratory, unpublished research, 1990.Google Scholar
  80. 81.
    M. Hillert:Phase Transformations, ASM, Metals Park, OH, 1970, f pp. 181–218.Google Scholar
  81. 83.
    C. Laird and H.I. Aaronson:Acta Metall., 1969, vol. 17, pp. 505–19.CrossRefGoogle Scholar
  82. 84.
    S. Elangovan and M.R. Plichta:Scripta Metall., 1986, vol. 20, pp. 575–80.CrossRefGoogle Scholar
  83. 85.
    R.M. Aiken, Jr. and M.R. Plichta:Phase Transformations 87, G.W. Lorimer, ed., Institute of Metals, London, 1988, pp. 504–06. $Google Scholar

Copyright information

© The Minerals, Metals and Materials Society, and ASM International 1991

Authors and Affiliations

  • G. Spanos
    • 1
  • W. T. Reynolds
    • 2
  • R. A. Vandermeer
    • 1
  1. 1.Physical Metallurgy BranchThe Naval Research LaboratoryWashington, DC
  2. 2.Department of Materials EngineeringVirginia Polytechnic Institute and State UniversityBlacksburg

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