Advertisement

Metallurgical Transactions A

, Volume 14, Issue 9, pp 1833–1841 | Cite as

Microstructural modification of austenitic stainless steels by rapid solidification

  • J. M. Vitek
  • A. Dasgupta
  • S. A. David
Transformations

Abstract

The microstructural modifications in three austenitic stainless steels (types 308, 310, and 312) were evaluated after rapid solidification. These three steels are commonly used weld filler metals. Two methods of rapid solidification were investigated, autogenous laser welding and arc-hammer splat quenching. The structure of 310 stainless steel was found to be 100 pct austenite, and did not vary over the range of conditions studied. On the contrary, the structures of types 308 and 312 steels were very sensitive to the cooling rates and solidification conditions. With the highest cooling rates, the type 308 structure was fully austenitic while the type 312 structure was fully ferritic. At lower cooling rates, the structures were duplex ferrite plus austenite. The results were interpreted in terms of faster kinetics of solidification of austenite compared to ferrite under the conditions examined. A comparison of the structures produced by the two rapid solidification techniques indicated the cooling rates are comparable.

Keywords

Ferrite Austenite Austenitic Stainless Steel Welding Speed Laser Welding 
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.
    J.C. Borland and R.N. Younger:Br. Weld. J., 1960, vol. 7, pp. 22–60.Google Scholar
  2. 2.
    F.C. Hull:Weld. J., 1967, vol. 46, pp. 399s-409s.Google Scholar
  3. 3.
    Y. Arata, F. Matsuda, and S. Katayama:Trans. JWRI, 1976, vol. 5(2), pp. 35–51.Google Scholar
  4. 4.
    S.A. David:Weld. J., 1981, vol. 60, pp. 63s-71s.Google Scholar
  5. 5.
    N. Suutala, T. Takalo, and T. Moisio:Metall. Trans. A, 1979, vol. 10A, pp. 512–14.Google Scholar
  6. 6.
    T. Takalo and T. Moisio:Metall. Trans. A, 1979, vol. 10A, pp. 1183–90.Google Scholar
  7. 7.
    J. C. Lippold and W. F. Savage:Weld. J., 1980, vol. 59, pp. 48s-58s.Google Scholar
  8. 8.
    Several reviews have been written. A recent review is: R. Mehrabian: “Rapid Solidification,”Int. Metals Review, 1982, vol. 27, pp. 185–208.Google Scholar
  9. 9.
    W.T. DeLong:Weld. J., 1974, vol. 53, pp. 273s-286s.Google Scholar
  10. 10.
    T. F. Kelly, M. Cohen, and J. B. Vander Sande, Massachusetts Institute of Technology, Cambridge, MA, unpublished research, 1982.Google Scholar
  11. 11.
    D.G. MacIsaac, Y. Shiohara, M.G. Chu, and M.C. Flemings: Massachusetts Institute of Technology, Cambridge, MA, unpublished research, 1982.Google Scholar
  12. 12.
    S. A. David and J. M. Vitek:Lasers in Metallurgy, K. Mukherjee and J. Mazumder, eds., TMS-AIME, Warrendale, PA, 1982, pp. 247–54.Google Scholar
  13. 13.
    J.M. Vitek and S.A. David:Scanning Electron Microscopy, 1981, vol. 1, pp. 169–75.Google Scholar
  14. 14.
    W.T. DeLong, G.A. Ostrom, and E.R. Szumachowski:Weld. J., 1956, vol. 35, pp. 526s-533s.Google Scholar
  15. 15.
    D. M. Kroeger, W. A. Coghlan, D. S. Easton, C. C. Koch, and J. O. Scarbrough:J. Appl. Phys., 1982, vol. 53, pp. 1445–53.CrossRefGoogle Scholar
  16. 16.
    L. S. Weinman and J. N. Devault:Laser-Solid Interactions andLaser Processing-1978, S.D. Ferris, H.J. Leamy, and J.M. Poate, eds., Amer. Inst, of Phys., New York, NY, 1979, pp. 239–42.Google Scholar
  17. 17.
    J. Bentley, N. J. Zaluzec, E. A. Kenik, and R. W. Carpenter:Scanning Electron Microscopy, 1979, vol. 2, pp. 581–94.Google Scholar
  18. 18.
    N.J. Zaluzec:Introduction to Analytical Electron Microscopy, J.J. Hren, J.J. Goldstein, and D.C. Joy, eds., Plenum Press, New York, NY, 1979, pp. 121–67.Google Scholar
  19. 19.
    J. M. Vitek and S. A. David:Trends in Welding Research in the United States, S. A. David, ed., American Society for Metals, Metals Park, OH, 1982, pp. 243–58.Google Scholar
  20. 20.
    S.A. David, G.M. Goodwin, and D.N. Braski:Weld. J., 1979, vol. 58, pp. 330s-336s.Google Scholar
  21. 21.
    S.C. Melgi, D.L. Eddingfield, and W. E. Brewer, Jr.: Southern Illinois University, Carbondale, IL, unpublished research, 1982.Google Scholar
  22. 22.
    N. Bloembergen:Laser-Solid Interactions and Laser Processing-1978, S.D. Ferris, H.J. Leamy, and J.M. Poate, eds., Amer. Inst, of Phys., New York, NY, 1979, pp. 1–9.Google Scholar
  23. 23.
    A. K. Jena, B. C. Giessen, M. B. Bever, and N. J. Grant:Acta Met., 1968, vol. 16, pp. 1047–51.CrossRefGoogle Scholar
  24. 24.
    T. W. Eagar: Massachusetts Institute of Technology, Cambridge, MA, private communication, 1982.Google Scholar

Copyright information

© The Metallurgical of Society of AIME 1983

Authors and Affiliations

  • J. M. Vitek
    • 1
  • A. Dasgupta
    • 1
  • S. A. David
    • 1
    • 2
  1. 1.Oak Ridge National LaboratoryOak Ridge
  2. 2.Welding and Brazing LaboratoryUSA

Personalised recommendations