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Journal of Materials Science

, Volume 17, Issue 12, pp 3479–3483 | Cite as

Mössbauer study of martensitic transformations in an Fe-29.6% Ni alloy

  • I. Akgün
  • A. Gedikoglu
  • T. N. Durlu
Papers

Abstract

The application of an external stress may form “band” shaped strain-induced martensites in the austenite structure of Fe alloys. Mössbauer spectroscopy and transmission electron microscopy techniques were used to clarify certain properties of strain-induced martensite in an Fe-29.6% Ni alloy. The reverse transformation mechanism between thermal plate martensite and the matrix austenite was also studied. Mössbauer spectroscopy made it possible to examine the same area of the austenitic thin foils during theγ→α→γ thermal cycles, and the volume fraction changes were determined. The habit plane and orientation relationship of strain-induced martensite were measured from the electron diffraction patterns and the latter parameter was found to be K-S type as with thermal plate martensites of the Fe-Ni alloys. The isomery shifts caused by the deformation and cycling procedures were also calculated for both austenite and martensite structures and the hyperfine magnetic field parameter of Fe-29.6% Ni strain-induced martensite was found to be equal to that of Fe-Ni-C alloys reported earlier.

Keywords

Austenite Martensite Martensitic Transformation Orientation Relationship Electron Diffraction Pattern 
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.
    E. S. Machlin andM. Cohen,Trans. Amer. Inst. Min. Metall. Eng. 191 (1951) 744.Google Scholar
  2. 2.
    T. Maki andC. M. Wayman,Acta Metall. 25 (1977) 681.Google Scholar
  3. 3.
    H. M. Otte,ibid. 5 (1957) 614.Google Scholar
  4. 4.
    I. Tamura, T. Maki andH. Hato,J. Jap. Inst. Metals 33 (1969) 1376.Google Scholar
  5. 5.
    T. N. Durlu, DPhil thesis, University of Oxford (1974).Google Scholar
  6. 6.
    T. N. Durlu,Acta Metall. 26 (1978) 1855.Google Scholar
  7. 7.
    C. M. Wayman, in “Proceedings of the First JIM Symposium On New Aspects of Martensite Transformations” (JIM, Kobe, 1976) p. 159.Google Scholar
  8. 8.
    L. H. Schwartz andK. J. Kim,Met. Trans. A 7A (1976) 1567.Google Scholar
  9. 9.
    R. Oshima, K. Adachi andF. E. Fujita, Proceedings of the International Conference on Martensite Transformations, Boston (MIT, Cambridge, Massachusetts, 1979) p. 491.Google Scholar
  10. 10.
    N. Decristofaro andR. Kaplow,ibid., p. 502.Google Scholar
  11. 11.
    A. Zararsiz, A. Gedikoglu andT. N. Durlu,Scripta Metall. 15 (1981) 595.Google Scholar
  12. 12.
    G. F. Rolling andR. H. Richman,Acta Metall. 18 (1970) 673.Google Scholar
  13. 13.
    G. B. Olson andM. Cohen,J. Less-Common Metals 28 (1972) 10.Google Scholar
  14. 14.
    P. C. Maxwell, A. Goldberg andJ. C. Shyne,Met. Trans. 5 (1974) 1305.Google Scholar
  15. 15.
    H. Onodera andI. Tamura,Scripta Metall. 11 (1977) 1057.Google Scholar
  16. 16.
    T. N. Durlu,ibid. 13 (1979) 425.Google Scholar
  17. 17.
    H. Onodera andI. Tamura,ibid. 14 (1980) 455.Google Scholar
  18. 18.
    T. N. Durlu,ibid. 15 (1981) 689.Google Scholar
  19. 19.
    H. Wegener, “Der Mössbauer Effekt” (B. I. Hochschultaschenbücher, Mannheim, 1966) p. 95.Google Scholar
  20. 20.
    C. M. Wayman,Adv. Mater. Sci. 3 (1968) 147.Google Scholar
  21. 21.
    G. Krauss andM. Cohen,Trans. AIME 227 (1963) 279.Google Scholar
  22. 22.
    G. Krauss andG. Thomas,ibid. 239 (1967) 1136.Google Scholar
  23. 23.
    B. Hyatt andG. Krauss,Trans. Amer. Soc. Metals 61 (1968) 168.Google Scholar
  24. 24.
    T. N. Durlu andJ. W. Christian,Met. Sci. 8 (1974) 1.Google Scholar
  25. 25.
    T. N. Durlu,Scripta Metall. 15 (1981) 383.Google Scholar
  26. 26.
    A. Zararsiz, A. Gedikoglu andT. N. Durlu,ibid. 15 (1981) 999.Google Scholar
  27. 27.
    T. N. Durlu,ibid. 12 (1978) 865.Google Scholar

Copyright information

© Chapman and Hall Ltd. 1982

Authors and Affiliations

  • I. Akgün
    • 1
  • A. Gedikoglu
    • 1
  • T. N. Durlu
    • 1
  1. 1.Department of Physics, Faculty of ScienceAnkara UniversityBeşevler, AnkaraTurkey

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