Metallurgical Transactions A

, Volume 7, Issue 1, pp 41–48 | Cite as

The effect of structure on the deformation of as-quenched and tempered martensite in an Fe-0.2 pct C alloy

  • Thomas Swarr
  • George Krauss
Mechanical Behavior

Abstract

As-quenched and tempered martensite in an Fe-0.2 pct C alloy were subjected to tensile testing and structural characterization by light and transmission electron microscopy. The light temper, 400°C-l min, did not change packet morphology, but did reduce dislocation density, coarsen lath size and cause the precipitation of carbides of a variety of sizes. The yield strength of the as-quenched martensite was strongly dependent upon packet size according to a Hall-Petch relationship, but tempering significantly diminished the packet size dependency, a result attributed to packet boundary carbide precipitation and the attendant elimination of carbon segregation present in the as-quenched martensite because of autotempering. Examination of thin foils from strained tensile specimens showed that a well-defined cell structure developed in the as-quenched martensite, but that the random distribution of jogged dislocations and carbide particles produced by tempering persisted on deformation of the tempered specimens.

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References

  1. 1.
    G. R. Speich and H. Warlimont:J Iron Steel Inst., 1968, vol. 206, p. 385.Google Scholar
  2. 2.
    G. R. Speich:Trans. TMS-AIME, 1969, vol. 245, p. 2553.Google Scholar
  3. 3.
    R. A. Grange:Trans. ASM, 1966, vol. 59, p. 26.Google Scholar
  4. 4.
    L. F. Porter and D. S. Dabkowski:Ultrafine Grain Metals, p. 133, Syracuse University Press, 1969.Google Scholar
  5. 5.
    A. R. Marder and G. Krauss:ASM, 1970, p. 822.Google Scholar
  6. 6.
    T. Swarr and G. Krauss:Grain Boundaries in Engr. Mat’ls., J. L. Walteret al, eds., p. 127, Claitor’s Publishing Division, Baton Rouge, La., 1975.Google Scholar
  7. 7.
    M. J. Roberts: Met.Trans., 1970, vol. 1, p. 3287.Google Scholar
  8. 8.
    T. Inoneet al:Trans. Jap. Inst. Metals, 1970, vol. 11, p. 36.Google Scholar
  9. 9.
    S. Matsudaet al:Trans. Iron Steel Inst. Jap., 1972, vol. 12, p. 325.Google Scholar
  10. 10.
    C. A. Apple, R. N. Caron, and G. Krauss:Met. Trans., 1974, vol. 5, p. 593.CrossRefGoogle Scholar
  11. 11.
    R. N. Caron and G. Krauss:Met. Trans., 1972, vol. 3, p. 2381.CrossRefGoogle Scholar
  12. 12.
    G. Krauss and A. R. Marder:Met. Trans., 1971, vol. 2, p. 2343.CrossRefGoogle Scholar
  13. 13.
    G. R. Speich and W.C. Leslie:Met. Trans., 1972, vol. 3, p. 1043.CrossRefGoogle Scholar
  14. 14.
    C. S. Smith and L. Guttman:Trans. AIME, 1953, vol. 197, p. 81.Google Scholar
  15. 15.
    T. L. Johnston and C. E. Feltner:Met. Trans., 1970, vol. 1, p. 1161.Google Scholar
  16. 16.
    R. H. Richman:Trans. TMS-AIME, 1968, vol. 227, p. 159.Google Scholar
  17. 17.
    C. L. Magee and R. C. Davies:Acta Met., 1971, vol. 19, p. 345.CrossRefGoogle Scholar
  18. 18.
    H. Muir, B. L. Averbach, and M. Cohen:Trans. ASM, 1955, vol. 47, p. 380.Google Scholar
  19. 19.
    C. L. Magee and H. W. Paxton:Trans. TMS-AIME, 1968, vol. 242, p. 1766.Google Scholar
  20. 20.
    D. Kuhlman-Wilsdorf:Trans. TMS-AIME, 1962, vol. 224, p. 1047.Google Scholar
  21. 21.
    D. KuhJman-Wilsdorf:Met. Trans., 1970, vol. 1, p. 3173.Google Scholar
  22. 22.
    D. W. Smith and R. F. Hehemann:J. Iron Steel Inst., 1971, vol. 209, p. 476.Google Scholar
  23. 23.
    A. R. Cox:J. Iron Steel Inst., 1967, vol. 205, p. 51.Google Scholar
  24. 24.
    E. Hornbogen and G. Staniek:J. Mater. Sci, 1974, vol. 9, p. 879.CrossRefADSGoogle Scholar
  25. 25.
    A. W. Thompson, M. I. Baskes, and W. F. Flanagan:Acta Met., 1973, vol. 21, p. 1017.CrossRefGoogle Scholar
  26. 26.
    M. F. Ashby:Phil. Mag., 1970, vol. 21, p. 399.CrossRefADSGoogle Scholar
  27. 27.
    M. R. Staker and D. L. Holt:Acta Met., 1972, vol. 20, p. 569.CrossRefGoogle Scholar
  28. 28.
    J. D. Embury, A. S. Keh, and R. M. Fisher:Trans. TMS-AIME, 1966, vol 236, p. 1252.Google Scholar
  29. 29.
    T. M. Scoonover and G. Krauss:Metals Eng. Quart, 1972, vol. 12, p. 41.Google Scholar

Copyright information

© The Metallurgical of Society of AIME 1976

Authors and Affiliations

  • Thomas Swarr
    • 1
  • George Krauss
    • 2
  1. 1.Knolls Atomic Power LaboratorySchenectady
  2. 2.Colorado School of MinesGolden

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