Skip to main content
SpringerLink
Log in

The effect of varying AI, Ti,and Nb content on the phase stability of INCONEL 718

  • Published:
Metallurgical Transactions A Aims and scope Submit manuscript

Abstract

The effects of varying the strengthening alloying elements on the microstructural stability of the superalloy INCONEL 718 have been investigated using scanning electron microscopy, transmission electron microscopy, and X-ray and synchrotron diffractometry. Time-temperature-transformation curves were determined for the embrittling σ-phase using conventional and synchrotron X-ray diffractometry. Increasing the Al/Ti ratio and the Al + Ti concentration in the alloy decreases the driving force both to form σ phase and coarsen γ". Abbreviated mechanical tests also indicate that the alloys with the highest Al + Ti content and Al/Ti ratio are more stable than the commercial “SUPER” IN718 after long times at elevated temperatures.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. National Materials Advisory Board, “Tantalum and Columbium Supply and Demand”, Publication NMAB-391, National Academy Press, Washington, DC, 1981.

    Google Scholar 

  2. I. Kirman and D.H. Warrington:J. Iron Steel Inst., Dec. 1967, pp. 1264-65.

  3. D.F. Paulonis, J.M. Oblak, and D.S. Duvall:Trans. ASM, 1969, vol. 62, pp. 611–22.

    CAS  Google Scholar 

  4. R. Cozar and A. Pineau,Metall. Trans., 1973, vol. 4, pp. 47–59.

    CAS  Google Scholar 

  5. J. K. Tien and S. Purushothaman: “The Metallurgy of High Temperature Alloys”,Properties of High Temperature Alloys, The Electrochemical Society, Princeton, 1976, pp. 3–41.

    Google Scholar 

  6. R. Cozar and A. Pineau: pp. 47-59.

  7. D. F. Paulonis, J. M. Oblak, and D. S. Duvall:Trans. ASM, 1969, vol. 62, pp. 611–22.

    CAS  Google Scholar 

  8. O.H. Kriege and J.M. Baris:Trans. ASM, 1969, vol. 62, pp. 195- 200.

    CAS  Google Scholar 

  9. J. M. Oblak, D. F. Paulonis, and D. S. Duvall:Metall. Trans., 1974, vol. 5, pp. 143–53.

    CAS  Google Scholar 

  10. J. F. Barker, E. W. Ross, and J. F. Radavich:Journal of Metals, Jan. 1970, pp. 31-41.

  11. D.F. Paulonis, J.M. Oblak, and D.S. Duvall:Trans. ASM, 1969, vol. 62, pp. 611–22.

    CAS  Google Scholar 

  12. R. Cozar and A. Pineau: pp. 47-59.

  13. J. C. Phillips, K. J. Baldwin, W. F. Lehnen, A. D. LeGrand, and C. T. Prewitt: “The SUNY X21 Beamline at NSLS: A Multi-use Port on a Dedicated High Brightness Synchrotron Radiation Source”,Nuclear Instruments and Methods in Nuclear Physics, 1986, pp. 182-89.

Download references

Author information

Authors and Affiliations

  1. Center for Strategic Materials, Henry Krumb School of Mines, Columbia University, 10027, New York, NY

    John P. Collier (Graduate Students), Song How Wong (Graduate Students) & John K. Tien (Howe Professor and Chairman of Metallurgy and Materials Science Department)

  2. SUNY X-3 Beamline, NSLS Brookhaven National Laboratory, 11973, UPTON, NY

    James C. Phillips (Professor, Chemistry Department, SUNY Buffalo)

Authors
  1. John P. Collier
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Song How Wong
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. John K. Tien
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. James C. Phillips
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Collier, J.P., Wong, S.H., Tien, J.K. et al. The effect of varying AI, Ti,and Nb content on the phase stability of INCONEL 718. Metall Trans A 19, 1657–1666 (1988). https://doi.org/10.1007/BF02645133

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02645133

Keywords

Search

Navigation