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Nitridation of HAYNES® NS-163® Alloy: Thermodynamics and Kinetics

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Abstract

HAYNES® NS-163® alloy is a new cobalt-base alloy that derives its exceptional high-temperature strength from a dispersion of fine-scale stable (Ti,Nb)N nitrides in the microstructure. In the present study, these nitrides were formed by means of a gas nitriding process. Resulting microstructures in the partially and fully nitrided conditions were examined. The nature and sequence of formation of the observed nitride compounds are rationalized by comparing their respective Gibbs free energies of formation. Nitride nucleation densities and morphologies are discussed in terms of the locally varying speed of the reaction front.

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References

  1. S.K. Srivastava, A New Fabricable Dispersion-Strengthened Cobalt-Base Wrought Superallloy (San Francisco, CA: TMS, 2009).

    Google Scholar 

  2. R. Schwarzkopf and R. Kieffer, Refractory Hard Metals (New York: MacMillan, 1953), p. 261.

    Google Scholar 

  3. M.W. Chan, JANAF Thermochemical Tables (New York: American Chemical Society, 1986).

    Google Scholar 

  4. T. Rosenquist, Principles of Extractive Metallurgy (New York: McGraw Hill, 1974), p. 528.

    Google Scholar 

  5. T.B. Massalski, H. Okamoto, P.R. Subramanian, and L. Kacprzak, Binary Alloy Phase Diagrams (Metals Park: ASM International, 1990), p. 2690.

    Google Scholar 

  6. L.E. Kindlimann and G.S. Ansell, Met. Trans. 1A, 163 (1970).

    Google Scholar 

  7. L.G. Petrova, Met. Sci. Heat Treat. 36, 130 (1994).

    Article  Google Scholar 

  8. U. Krupp and H.-J. Christ, Oxid. Met. 52, 299 (1999).

    Article  Google Scholar 

  9. R.A. Rapp, Corrosion 21, 382 (1965).

    Google Scholar 

  10. M.F. Henry, Y.S. Yoo, D.Y. Yoon, and J. Choi, Met. Trans. 24A, 1733 (1993).

    Google Scholar 

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Acknowledgements

Mr. J. Cotner provided the SEM micrographs and XRD analyses. Helpful discussions with Mr. K. Susko (Exotic Metal Treating, Inc.) are appreciated.

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Authors and Affiliations

  1. Haynes International, Inc., Kokomo, IN, USA

    M. Fahrmann & S. K. Srivastava

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  1. M. Fahrmann
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  2. S. K. Srivastava
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Correspondence to M. Fahrmann.

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Fahrmann, M., Srivastava, S.K. Nitridation of HAYNES® NS-163® Alloy: Thermodynamics and Kinetics. JOM 64, 280–284 (2012). https://doi.org/10.1007/s11837-012-0239-y

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  • DOI: https://doi.org/10.1007/s11837-012-0239-y

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