Advertisement

Journal of Materials Science

, Volume 26, Issue 18, pp 5025–5036 | Cite as

Effect of composition on the transformation behaviour of duplex 316 weld metal

  • J. J. Smith
  • R. A. Farrar
Papers

Abstract

Several 316 manual metal arc weld metals produced with commercial and experimental consumables were aged between 600 and 850 °C. This resulted in the dissolution of the δ-ferrite with the appearance of new austenite, M23C6, intermetallics σ, χ and η phase. During transformation, the δ-ferrite becomes progressively enriched in Cr, Mo and Si and, depending on the local composition of the δ-ferrite, eventually transforms to intermetallic σ or χ phases. A transformation model has been developed which indicates that solute diffusion via the δ/γ interface is the controlling mechanism. This enrichment process has been found to be important in controlling the formation of intermetallics. In the weld metals containing controlled residual additions of Ti and Ti + B, ageing resulted in the a fine dispersion of MX phase in the austenitic matrix.

Keywords

Polymer Austenite Weld Metal Transformation Model Solute Diffusion 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    B. Weiss and R. Stickler, Metall. Trans. 3 (1972) 851.CrossRefGoogle Scholar
  2. 2.
    F. R. Beckitt, JISI 207 (1969) 632s.Google Scholar
  3. 3.
    J. K. L. Lai, Mater. Sci. Engng 58 (1983) 195.CrossRefGoogle Scholar
  4. 4.
    F. V. Ellis and J. E. Bynum, in “International Conference on Advances in Life Prediction Methods”, edited by D. A. Woodford and J. R. Whitehead (ASME, New York, 1983) p. 337.Google Scholar
  5. 5.
    J. M. Leitnaker, Welding J. Res. Suppl. 61 (1982) 9s.Google Scholar
  6. 6.
    R. A. Farrar and R. G. Thomas, J. Mater. Sci. 18 (1983) 3461.CrossRefGoogle Scholar
  7. 7.
    J. Wegrzyn and A. Klimpel, Welding J. Res. Suppl. 60 (1981) 146s.Google Scholar
  8. 8.
    T. P. S. Gill, M. Vijayalakshmi, J. B. Gnanamoorthy and K. A. Padmanabhan, ibid. 65 (1986) 122s.Google Scholar
  9. 9.
    J. M. Vitek and S. A. David, ibid. 65 (1986) 106s.Google Scholar
  10. 10.
    S. A. David, ibid. 60 (1981) 63s.Google Scholar
  11. 11.
    W. E. Voice and R. G. Faulkner, J. Mater. Sci. 22 (1987) 4221.CrossRefGoogle Scholar
  12. 12.
    A. F. Smith, Metal Sci. 9 (1975) 375.CrossRefGoogle Scholar
  13. 13.
    Idem., ibid. 10 (1976) 418.CrossRefGoogle Scholar
  14. 14.
    J. K. L. Lai, “Phase Transformations”, Spring Residential Conference, Institution of Metallurgists, Series 3, 2 no. 11, (1979) Paper 1201-79-Y.Google Scholar
  15. 15.
    C. J. Bechtoldt and H. C. Vacher, J. Res. Nat. Bur. Stand. 58 (1957) 7.CrossRefGoogle Scholar
  16. 16.
    G. F. Slattery, M. E. Lambert and S. R. Keown, Met. Tech. 10 (1982) 373.CrossRefGoogle Scholar
  17. 17.
    R. A. Farrar, J. Mater. Sci. 22 (1987) 363.CrossRefGoogle Scholar
  18. 18.
    V. S. Raghunathan, V. Seetharaman, S. Venkadesan and P. Rodriguez, Metall. Trans. 10 (1979) 1683.CrossRefGoogle Scholar
  19. 19.
    R. G. Thomas and S. R. Keown, in “Conference on the Mechanical Behaviour and Nuclear Applications of Austenitic Stainless Steel at Elevated Temperatures”, Varese, Italy (Metal Society, London, 1981).Google Scholar
  20. 20.
    J. M. Vitek and S. A. David, Welding J. Res. Suppl. 63 (1984) 246s.Google Scholar
  21. 21.
    R. F. Decker, in “Proceedings of the Steel Strengthening Symposium” (Zurich, Switzerland, 1969) p. 1.Google Scholar
  22. 22.
    M. Morinaga, N. Yakawa and H. Ezaki, Phil. Mag. A 51 (1985) 223.CrossRefGoogle Scholar
  23. 23.
    B. A. Senior, J. Mater. Sci. 25 (1990) 45.CrossRefGoogle Scholar
  24. 24.
    K. Ohmura, Y. Otoguro, S. Aoki, S. Suzuki, K. Bando and T. Zaizen, in “Proceedings of the 2nd International Conference on Creep and Fracture of Engineering Materials and Structures” (Pineridge Press, Swansea, 1984).Google Scholar
  25. 25.
    F. B. Pickering, in “Conference Proceedings Stainless Steel '84”, Gothenburg, Sweden, Institute of Metals, Book 320 (Institute of Metals, 1984), p. 2.Google Scholar
  26. 26.
    H. O. Andren, A. Henjered and L. Karlsson, ibid., Book 320, p. 91.Google Scholar
  27. 27.
    J. J. Smith, PhD thesis, University of Southampton (1989).Google Scholar

Copyright information

© Chapman & Hall 1991

Authors and Affiliations

  • J. J. Smith
    • 1
  • R. A. Farrar
    • 1
  1. 1.Department of Mechanical EngineeringThe University of SouthamptonHampshireUK

Personalised recommendations