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On the kinetics of the spreading of extrinsic grain boundary dislocations

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Abstract

The kinetics of the disappearance (spreading) of extrinsic grain boundary dislocations (EBGDs) at random grain boundaries has been investigated in a low-carbon austenitic stainless steel (0.01C-19Cr-18Ni) by measuring in TEM their disappearance times at the temperature range 360 to 450 °C. Experimental results fit most satisfactorily to a kinetic equation of the general form:t d =AT d exp(ΔH b /RT d ) derived by Johannesson and Thölen10 and Lojkowski and Grabskiii12 assuming either a dissociation into discrete structural grain boundary dislocation or the core spreading, respectively. Additional spreading experiments performed on commercial 316 austenitic stainless steel also support this general equation. Calculations employing experimental results indicate that the spreading time of a parallel component of the EGBD's Burgers vector is negligible and does not play any role during the process. Johannesson and Thölen10 and Lojkowski and Grabskiii12 models are practically indistinguishable assuming that in the J & T model an EGBD dissociates into an array of grain boundary dislocations with the magnitude of the Burgers vectorb b ≊ 0.07 nm. The TEM photographic documentation of the spreading clearly indicates that some grain boundaries exhibiting fine lines (not Moiré fringes) behave during spreading as random (general) boundaries. On the other hand, some grain boundaries free of any fine lines exhibit very high spreading temperature indicating a special behavior.

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References

  1. Y. Ishida, T. Hasegawa, and F. Nagata:Trans. JIM, 1968, vol. 9 (Suppl.), pp. 504–08.

    Google Scholar 

  2. P. H. Pumphrey and H. Gleiter:Phil. Mag., 1974, vol 30, pp. 593–602.

    Article  CAS  Google Scholar 

  3. P. H. Pumphrey:J. Physique, 1975, vol. 36 (Suppl to No 10) pp. C4 23–33.

    Google Scholar 

  4. PH. Pumphrey and H. Gleiter:Phil. Mag., 1975, vol 32, pp. 881–85.

    Article  CAS  Google Scholar 

  5. R. A. Varin:Phys. Stat. Sol. (a), 1979, vol. 52, pp. 347–56.

    Article  CAS  Google Scholar 

  6. R. A. Varin:J. Mater. Sci., 1979, vol. 14, pp. 811–16.

    CAS  Google Scholar 

  7. R.A. Varin, W. Lojkowski, and R.Z. Valiev:Scr. Metall., 1981, vol. 15, pp. 795–98.

    Article  Google Scholar 

  8. R. A. Varin:Mater. Sci. Eng., 1984, vol. 66, pp. 97–105.

    Article  CAS  Google Scholar 

  9. R.A. Varin:Phys. Stat. Sol. (a), 1982, vol. 73, pp. K51–55.

    Article  CAS  Google Scholar 

  10. T. Johannesson and A. Thölen:Metal Sci. J., 1972, vol. 6, pp. 189–94.

    Article  CAS  Google Scholar 

  11. W. Lojkowski: Ph.D. Thesis, The Warsaw Technical University, 1980.

  12. W. Lojkowski and M. W. Grabski: in “Deformation of Polycrystals; Mechanisms and Microstructures,”Proc. 2nd Risø lnt. Symposium on Metallurgy and Materials Science, September 1981, N. Hansen, A. Horsewell, T. Leffers, and H. Lilholt, eds., Risø National Laboratory, Risø, 1981, pp. 329–34.

    Google Scholar 

  13. A. Thölen: inProc. Eighth Int. Congr. on EM, Canberra, 1974, vol. 1, pp. 606–07.

    Google Scholar 

  14. R.A. Varin:Z. Metallkde., 1982, vol. 73, pp. 654–58.

    CAS  Google Scholar 

  15. R.A. Varin and K. Tangri:Metall. Trans. A, 1981, vol. 12A, pp. 1859–66.

    Google Scholar 

  16. R. A. Varin and K. Tangri:Z. Metallkde., 1982, vol. 73, pp. 144–48.

    CAS  Google Scholar 

  17. R. V. Patil and B. D. Sharma:Met. Sci., 1982, vol. 16, pp. 389–92.

    CAS  Google Scholar 

  18. K.J. Kurzydlowski, R.A. Varin, and W. Zielinski:Acta Metall., 1984, vol. 32, pp. 71–78.

    Article  CAS  Google Scholar 

  19. G. Wirmark, J.O. Nilsson, and G. L. Dunlop:Phil. Mag. A, 1981, vol. 43A, pp. 93–101.

    Article  Google Scholar 

  20. H. Gleiter:Mater. Sci. Eng., 1982, vol. 52, pp. 91–131.

    Article  CAS  Google Scholar 

  21. R.J. Pond and D. A. Smith:Phil. Mag., 1977, vol. 36, pp. 353–66.

    Article  CAS  Google Scholar 

  22. D. Wolf:J. Phvsique, 1985, vol. 46 (Suppl. to No. 4), pp. C4 197–211.

    Google Scholar 

  23. R. W. Balluffi, Y. Komem, and T. Schober:Surf. Sci., 1972, vol. 31, pp. 68–103.

    Article  CAS  Google Scholar 

  24. V. T. Borisov, V. M. Golikov, and G. V. Scherbedinskiy:Fiz. Met. Metaloved., 1964, vol. 17, pp. 881–85.

    CAS  Google Scholar 

  25. D. Gupta:Phil. Mag., 1976, vol. 33, pp. 189–97.

    Article  CAS  Google Scholar 

  26. D. Gupta:Metall. Trans. A, 1977, vol. 8A, pp. 1431–38.

    CAS  Google Scholar 

  27. R. A. Perkins, R. A. Padgett, and N. K. Tunali:Metall. Trans., 1973, vol. 4, pp. 2535–40.

    Article  CAS  Google Scholar 

  28. A. F. Smith and G. B. Gibbs:Met. Sci. J., 1969, vol. 3, pp. 93–94.

    Article  Google Scholar 

  29. B. Weiss and R. Stickler:Metall. Trans., 1972, vol. 3, pp. 851–78.

    Article  CAS  Google Scholar 

  30. L. E. Murr:Electron and Ion Microscopy and Microanalysis, Marcel Dekker Inc., New York and Basel, 1982, p. 740.

    Google Scholar 

  31. H.M. Ledbetter:Phys. Stat. Sol. (a), 1984, vol. 35, pp. 89–93.

    Article  Google Scholar 

  32. T.P. Darby, R. Schindler, and R.W. Balluffi:Phil. Mag. A, 1978, vol. 37A, pp. 245–56.

    Article  Google Scholar 

  33. P. H. Pumphrey:Phys. Stat. Sol. (a), 1975, vol. 28, pp. 545–53.

    Article  CAS  Google Scholar 

  34. V. Linnenbom, M. Tetenbaum, and C. Cheek:J. Appl. Phys., 1955, vol. 26, pp. 32–35.

    Article  Google Scholar 

  35. W. Assassa and P. Guiraldenq:Met. Sci., 1978, vol. 12, pp. 123–28.

    CAS  Google Scholar 

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Authors and Affiliations

  1. Materials Science in the Department of Mechanical Engineering, University of Waterloo, N2L 3G1, Waterloo, ON, Canada

    R. A. Varin (Assistant Professor)

  2. Institut of the Electronics Technology, Electron Microscopy Laboratory, Al. Lotnikow 32/46, 02-668, Warsaw, Poland

    E. Romanowska-Haftek (Senior Researcher)

Authors
  1. R. A. Varin
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  2. E. Romanowska-Haftek
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Varin, R.A., Romanowska-Haftek, E. On the kinetics of the spreading of extrinsic grain boundary dislocations. Metall Trans A 17, 1967–1975 (1986). https://doi.org/10.1007/BF02644994

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