Abstract
The effect of copper on proeutectoid cementite precipitation was investigated by examining the isothermal transformation characteristics of Fe-C and Fe-C-Cu alloys that had comparable carbon contents. The TTT diagrams generated for the Fe-1.43 wt pct C and the Fe-1.49 wt pct C-4.90 wt pct Cu alloys showed that the kinetics of proeutectoid cementite precipitation were not significantly affected by copper. The morphology of the proeutectoid cementite, as seen in the optical microscope, was also substantially the same in both alloys. However, transmission electron microscopy revealed the presence of small epsilon-copper precipitates within the proeutectoid cementite of the copper containing steel. It was concluded that this precipitation of ε-Cu took place at the cementite : austenite interphase boundaries, and that the transport of copper to the precipitates was accomplished by interphase boundary diffusion. The small influence of copper on the kinetics of proeutectoid cementite precipitation is discussed in terms of diffusional growth theories and the structure of the cementite : austenite interphase boundary.
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References
R. W. Heckel and H. W. Paxton:Trans. AIME, 1970, vol. 53, p. 539.
H. I. Aaronson:Decomposition of Austenite by Diffusional Processes, Interscience, New York, NY, 1962, p. 387.
W. T. Reynolds, Jr., M. Enomoto, and H. I. Aaronson:Phase Transformations in Ferrous Alloys, TMS-AIME, Warrendale, PA, 1984, p. 115.
G. Krauss:Metall. Trans. A, 1978, vol. 9A, p. 1527.
R. W. Heckel and H. W. Paxton:Trans. TMS-AIME, 1960, vol. 218, pp. 799–806.
T. Ando and G. Krauss:Acta Metall., 1981, vol. 29, pp. 351–63.
J. R. Bradley, J. M. Rigsbee, and H. I. Aaronson:Metall. Trans. A, 1977, vol. 8A, pp. 323–33.
W. S. Owen:J. Iron Steel Inst., 1951, vol. 167, p. 117.
L. S. Darken:Trans. TMS-AIME, 1961, vol. 221, p. 654.
T. Ando and G. Krauss:Metall. Trans. A, 1981, vol. 12A, pp. 1283–90.
J. Fridburg and M. Hillert:Acta Metall., 1970, vol. 18, pp. 1253–60.
R. W. K. Honeycombe:Metall. Trans. A, 1976, vol. 7A, pp. 317–21.
R. W. K. Honeycombe:Phase Transformations in Ferrous Alloys, TMS-AIME, Warrendale, PA, 1984, p. 259.
R. A. Ricks, P. R. Howell, and R. W. K. Honeycombe:Metall. Trans. A, 1979, vol. 10A, pp. 1049–58.
R. A. Ricks, P. R. Howell, and R. W. K. Honeycombe:Met. Sci., 1980, vol. 14, pp. 562–68.
R. A. Ricks:J. Matl. Sci., 1981, vol. 16, pp. 3006–12.
R. A. Ricks and P.R. Howell:Acta Metall., 1983, vol. 31, pp. 853–61.
T. Obara, G. J. Shiflet, and H. I. Aaronson:Metall. Trans. A, 1983, vol. 14A, pp. 1159–67.
H. I. Aaronson, M. R. Plichta, G. W. Franti, and K. C. Russel:Metall. Trans. A, 1978, vol. 9A, pp. 363–71.
G. J. Shiflet, H. I. Aaronson, and J. R. Bradley:Metall. Trans. A, 1981, vol. 12A, pp. 1743–50.
A. Stosuy and M. Ohring:Copper in Iron and Steel, I. LeMay and L. McDonald Schetky, eds., J. Wiley & Sons, New York, NY, 1982.
L. Habraken and J. Lecomte-Beckers:Copper in Iron and Steel, I. LeMay and L. McDonald Schetky, eds., J. Wiley & Sons, New York, NY, 1982, p. 45.
M. C. Sneed, J. L. Maynard, and R. C. Brasted:Comprehensive Inorganic Chemistry, D. VanNorstrand Co., New York, NY, 1954, vol. II, p. 110.
A. Hultgren: Kungl. Svenska Vetenskapsakademiens Handlingar, 1953, vol. 4, No. 3, pp. 1–47.
B. Uhrenius:Hardenability Concepts with Applications to Steels, D. V. Doane and J. S. Kirkaldy, eds., ASM, Warrendale, PA, 1976.
M. Hansen:Constitution of Binary Alloys, 2nd ed., McGraw-Hill, New York, NY, 1958, p. 353.
J. R. Bradley and H. I. Aaronson:Metall. Trans. A, 1977, vol. 8A, pp. 317–22.
R. L. Fullman:Trans. AIME, 1953, vol. 197, pp. 447–52.
J. A. Wasynczuk: Ph.D. Thesis, University of California, Berkeley, CA, 1985.
B. V. Narashima Rao and G. Thomas:Proc. 1COMAT 1979, MIT Press, Cambridge, MA, 1979, pp. 12–21.
J. W. Christian and D. V. Edmonds:Phase Transformations in Ferrous Alloys, TMS-AIME, Warrendale, PA, 1984, p. 293.
H. Lipson and N. J. Petch:J. Iron Steel lnst., 1940, vol. 142, p. 95.
G. Thomas and M. J. Goringe:Transmission Electron Microscopy of Materials, J. Wiley and Sons, New York, NY, 1979, p. 90.
P. B. Hirsch, A. Howie, R. B. Nicholson, D. W. Pashley, and M. J. Whelan:Electron Microscopy of Thin Crystals, 2nd ed., R. E. Krieger Co., Malabar, FL, 1977, p. 353.
W. B. Pearsons:Lattice Spacings and Structures of Metals and Alloys, Pergamon Press, New York, NY, 1958, p. 570, p. 919.
M. Hillert:Solid-Solid Phase Transformations, TMS-AIME, Warrendale, PA, 1982, p. 789.
K. R. Kinsman and H. I. Aaronson:Metall. Trans., 1973, vol. 4, pp. 959–67.
G. R. Speich, J. A. Gula, and R. M. Fisher:The Electron Microprobe, J. Wiley and Sons, New York, NY, 1966, p. 525.
G. Thomas:In Situ Experiments with High Voltage Electron Microscopes, Proc. of Int. Symp. on HVEM, Osaka, Japan, Nov. 18-20, 1985, p. 351.
W. Pitsch:Acta Metall., 1962, vol. 10, pp. 897–99.
C. Zener:J. Appl. Phys., 1949, vol. 20, pp. 950–53.
C. Wells, W. Batz, and R. F. Mehl:Trans. AIME, 1950, vol. 188, pp. 553–60.
L. Kaufman, S. V. Radcliff, and M. Cohen:Decomposition of Austenite by Diffusional Processes, Interscience, New York, NY, 1962, p. 313.
R. Trivedi and G. M. Pound:J. Appl. Phys., 1967, vol. 38, p. 3569.
H. I. Aaronson, H. A. Domian, and G. M. Pound:Trans. TMS-AIME, 1966, vol. 236, pp. 768–81.
J. R. Bradley and H. I. Aaronson:Metall. Trans. A, 1981, vol. 12A, pp. 1729–41.
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Wasynczuk, J.A., Fisher, R.M. & Thomas, G. Effects of copper on proeutectoid cementite precipitation. Metall Trans A 17, 2163–2173 (1986). https://doi.org/10.1007/BF02645914
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DOI: https://doi.org/10.1007/BF02645914