Skip to main content
SpringerLink
Log in

Microstructural features of the hydrogenation-dehydrogenation process in Ti alloys

  • Articles
  • Published:
Journal of Materials Research Aims and scope Submit manuscript

Abstract

Temporary alloying of Ti alloys with hydrogen is used to modify microstructure and hence enhance mechanical properties. In the present work the influence of the thermal history of the Ti–6Al–4V alloy on the final microstructure was studied. Two different kinds of microstructures were investigated: (a) as-hot isostatic pressed (HIP) having an α + β microstructure; (b) β-solution-treated and subsequently quenched (α'-microstructure). After each stage of the hydrogenation-dehydrogenation (HDH) process the material was analyzed by optical, scanning electron and transmission electron microscopy, and by x-ray diffractometry. It was found that fcc (γ) hydrides precipitate in both the α and the α' matrix. The orientation relationships were found to be the same in both cases. Hydrides precipitate from the β-phase when the hydrogen content of the alloy is sufficiently high. The minimum concentration that still led to precipitation was 1.4 wt. % H. The β/γ orientation relationship was determined. The HDH process resulted in either of two structures: (1) a fine, broken-up microstructure containing a fine mixture of α' + (α + β) when the starting microstructure was α', or (2) a modified α + β microstructure containing fine α and β precipitates and a high density of microdefects within the primary α in the as-HIP α + β microstructure specimens.

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. D. Eylon, F. H. Froes, and R. W. Gardiner, in Titanium Technology: Present Status and Future Trends, edited by F. H. Froes, D. Eylon, and H. B. Bomberger (The Titanium Development Assoc, 1985), p. 35.

  2. I. Weiss, G. E. Welsch, F. H. Froes, and D. Eylon, Titanium Science and Technology, Proc. of the 5th Int. Conf. on Titanium, Munich, FRG, September 10–14, 1984, edited by G. Lütjering, U. Zwicker, and W. Bunk (Deutsche Gesellschaft fur Metallkunde e.V., 1985), Vol. 3, p. 1503.

  3. L. Levin, R. G. Vogt, D. Eylon, and F. H. Froes, Titanium Science and Technology, Proc. of the 5th Int. Conf. on Titanium, Munich, FRG, September 10–14, 1984, edited by G. Liitjering, U. Zwicker, and W. Bunk (Deutsche Gesellschaft fur Metallkunde e.V., 1985), Vol. 4, p. 2107.

  4. L. Levin, R.G. Vogt, D. Eylon, and F.H. Froes: Method for Refining Microstructures of Titanium Alloy Castings, U. S. Patent 4612066 (1986).

  5. L. Levin, R. G. Vogt, D. Eylon, and F. H. Froes: Method for Refining Microstructures of Prealloyed Titanium Powder Compacted Articles, U.S. Patent 4655 855 (1987).

  6. F. H. Froes and D. Eylon, in Titanium Technology: Present Status and Future Trends, edited by F. H. Froes, D. Eylon, and H. B. Bomberger (The Titanium Development Assoc, 1985), p. 49.

  7. W.R. Kerr, P.R. Smith, M.E. Rosenblum, F.J. Gurney, Y.R. Mahajan, and L. R. Bidwell, Titanium-80 Science and Technology, Proc. of the 4th Int. Conf. on Titanium, Kyoto, Japan, May 19–22, 1980, edited by H. Kimura and O. Izumi (TMS-AIME Pub., Warrendale, PA, 1981), Vol. 4, p. 2477.

  8. W.R. Kerr, Metall. Trans. 16A, 1077 (1985).

    Article  CAS  Google Scholar 

  9. T. Enjo and T. Kuroda, Trans. JWRI 15 (1), 41 (1986).

  10. N. V. Ageev, A. A. Babareko, E. B. Rubins, S. Y. Betsoten, and L. A. Bukin, Met. Sci. and Heat Treatment, 124 (1976). [Trans. from Metall. i Term. Obr. Metallov. 2, 17 (1976).]

  11. D.S. Shih and H.R. Birnbaum, Scripta Metall. 20, 1261 (1986).

    Article  CAS  Google Scholar 

  12. J. C. Williams, in Precipitation in Solids, edited by K. C. Russell and H.I. Aaronson (TMS-AIME, New York, 1976), p. 191.

  13. J. C. Williams, in Titanium Technology: Present Status and Future Trends, edited by F.H. Froes, D. Eylon, and H.B. Bomberger (The Titanium Development Assoc, 1985), p. 77.

  14. C. G. Rhodes and N. E. Paton, Metall. Trans. 10A, 209 (1979).

    Article  CAS  Google Scholar 

  15. P. Hallam and C. Hammond, Titanium-80 Science and Technology, Proc of the 4th Int. Conf. on Titanium, Kyoto, Japan, May 19-22, 1980, edited by H. Kimura and O. Izumi (TMS-AIME Pub., Warrendale, PA, 1981), Vol. 2, p. 1435.

  16. T. L. Trenogina and R. M. Lerinman, Proc. of the 3rd Int. Conf. on Titanium, Moscow, May 18–21, 1976, edited by J.C. Williams and A. F. Belov (Plenum Press, New York, 1982), p. 1623.

  17. Y. Sakamoto and T. Montani, Trans. JIM 17, 743 (1976).

  18. C.A. Kelto, B.S. Kosmal, D. Eylon, and F.H. Froes, J. Metals 32, 17 (1980).

    CAS  Google Scholar 

  19. A. Bourret, A. Lasalmonie, and S. Naka, Scripta Metall. 20, 861 (1986).

Download references

Author information

Authors and Affiliations

  1. Department of Materials Engineering, Technion, Haifa, 32000, Israel

    I. Grimberg & L. Levin

  2. Israel Institute of Metals, Technion, Haifa, 32000, Israel

    O. Botstein

  3. Institute for Materials and Advanced Processes, College of Mines, University of Idaho, Moscow, Idaho, 83843, USA

    F. H. Froes

Authors
  1. I. Grimberg
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. L. Levin
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. O. Botstein
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. F. H. Froes
    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

Grimberg, I., Levin, L., Botstein, O. et al. Microstructural features of the hydrogenation-dehydrogenation process in Ti alloys. Journal of Materials Research 6, 2069–2076 (1991). https://doi.org/10.1557/JMR.1991.2069

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1557/JMR.1991.2069

Search

Navigation