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The grain size dependence of flow and fracture in a Cr-Mn-N austenitic steel from 300 to 1300K

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Abstract

The influence of polycrystal grain size in the range 18 µm to 184 µm on the tensile behavior of an austenitic stainless steel containing by wt pct 21 Cr, 14 Mn, 0.68 N and 0.12 C has been investigated over the temperature range 298 to 1273 K. Decreasing grain size has been shown to increase the flow stress at small strains in accordance with the Hall-Petch relationship at temperatures up to 873 K. The variation of the Hall-Petch constants with temperature is influenced by dynamic strain ageing between 575 and 775 K. Above 875 K, especially at low strain-rates a reversal of the Hall-Petch correlation occurs and the flow stress decreases with decreasing grain size. The relationship between ductility and temperature is marked by a minimum ductility at about half the absolute melting temperature and intergranular cavitation is observed. A decrease in grain size generally enhanced the ductility in this temperature regime whilst at fine grain sizes this trend was reversed. These results are explained in terms of a combination of a Griffith-Orowan type fracture criterion and an intergranular void sheet mechanism of fracture.

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ReferencesReferences

  1. B. R. Nijhawan, P. K. Gupta, S. S. Bhatnagar, B. K. Guha, and S. S. Dhanjal:J. Iron Steel Inst., 1967, vol. 204, p. 292.

    Google Scholar 

  2. E. Hall:Proc. Phys. Soc, 1951, vol. B64, p. 747, N.S. Petch:J. Iron Steel Inst., 1953, vol. 174, p. 25.

    ADS  CAS  Google Scholar 

  3. H. Abrams:Metallography, 1971, vol. 4, p. 59.

    Article  Google Scholar 

  4. J. K. Mukhetjee and B. R. Nijhawan:J. Iron Steel Inst., 1967, vol. 204, p. 62.

    Google Scholar 

  5. V. Kutumba Rao, D. M. R. Taplin, and P. Rama Rao:Trans. Ind. Inst. Metals, 1970, vol. 23, p. 61.

    Google Scholar 

  6. V. Kutumba Rao and P. Rama Rao:Metallography, 1972, vol. 5, p. 94.

    Article  Google Scholar 

  7. R. W. Armstrong, I. Codd, R. M. Douthwaite, and N. J. Petch:Phil. Mag., 1962, vol. 7, p. 45.

    Article  ADS  CAS  Google Scholar 

  8. R. W. Armstrong and P. C. Jindal:Trans. TMS-AIME, 1968, vol. 242, p. 2513.

    CAS  Google Scholar 

  9. R. K. Bell and T. G. Langdon:J. Mater. Sci., 1967, vol. 2, p. 313.

    Article  ADS  CAS  Google Scholar 

  10. R. W. Armstrong:Met. Trans., 1970, vol. 1, p. 1169.

    CAS  Google Scholar 

  11. D. V. Wilson:Met. Sci. J., 1967, vol. l, p. 40.

    Google Scholar 

  12. J. H. Westbrook:Met. Rev., 1964, vol. 9, p. 415.

    CAS  Google Scholar 

  13. R.W. Armstrong:Acta Met., 1968, vol. 16, p. 347.

    Article  CAS  Google Scholar 

  14. R. W. Armstrong:Dislocation Dynamics, A.R. Rosenfield, ed., p. 293, McGraw-Hill, New York, 1968.

    Google Scholar 

  15. J. T. Barnby:J. Iron Steel Inst., 1965, vol. 203, p. 392.

    Google Scholar 

  16. A. W. Thompson, M. I. Baskes, and W. F. Flanagan:Acta Met., 1973, vol. 21, 1017.

    Article  CAS  Google Scholar 

  17. M. F. Ashby:Phil. Mag., 1970, vol. 21, p. 399.

    Article  ADS  CAS  Google Scholar 

  18. R. G. Fleck, G. J. Cocks, and D. M. R. Taplin:Met. Trans., 1970, vol. l, p. 3415.

    Google Scholar 

  19. F. Garofalo:Ductility, p. 120, American Society for Metals, Metals Park, 1968.

    Google Scholar 

  20. D. M. R. Taplin:Phil. Mag., 1969, vol. 20, p. 1079.

    Article  ADS  CAS  Google Scholar 

  21. D. M. R. Taplin:J. Austr. Inst. Metals, 1965, vol. 10, p. 335.

    Google Scholar 

  22. R. Söderberg:J. Mater. Sci., 1972, vol. 7, p. 1373.

    Article  ADS  Google Scholar 

  23. R. G. Fleck, C. J. Beevers, and D. M. R. Taplin:Met. Sci., 1974, vol. 8, p. 251.

    Google Scholar 

  24. F. A. McClintock:Ductility, pp. 255–77, American Society for Metals, Metals Park, 1969.

    Google Scholar 

  25. J. A. Williams:Phil. Mag., 1969, vol. 20, p. 635.

    Article  ADS  CAS  Google Scholar 

  26. P. K. Venkiteswaran and D. M. R. Taplin:Met. Sci., 1974, vol. 8, p. 97.

    Google Scholar 

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Authors and Affiliations

  1. Department of Metallurgical Engineering, Institute of Technology, Banaras Hindu University, Varanasi, India

    V. Kutumba Rao (Reader in Mechanical Metallurgy) & P. Rama Rao (Reader in Mechanical Metallurgy)

  2. Department of Mechanical Engineering, University of Waterloo, N2L, 3G1, Waterloo, Ontario, Canada

    D. M. R. Taplin (Professor of Mechanical Engineering)

Authors
  1. V. Kutumba Rao
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  2. D. M. R. Taplin
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  3. P. Rama Rao
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Rao, V.K., Taplin, D.M.R. & Rao, P.R. The grain size dependence of flow and fracture in a Cr-Mn-N austenitic steel from 300 to 1300K. Metall Trans A 6, 77–86 (1975). https://doi.org/10.1007/BF02673673

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  • DOI: https://doi.org/10.1007/BF02673673

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