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Evaluations of P/M Gamma Titanium Aluminides

  • Published:
Advanced Performance Materials

Abstract

For the last five years, the Structures, Materials and Propulsion Laboratory of the Institute for Aerospace Research, National Research Council of Canada, has devoted a significant amount of effort investigating powder metallurgy gamma titanium aluminides. The main results of the studies on microstructural evolution, hot workability, creep behaviour and microstructure-mechanical property relationships for P/M gamma alloys are reviewed in this article. Work is in progress to apply the knowledge gained to cast gamma alloys for gas turbine applications.

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References

  1. H.A. Lipsitt, Titanium aluminides—An overview, in High-Temperature Ordered Intermetallic Alloy, edited by C.C. Kock, C.T. Liu, and N.S. Stoloff (MRS, Pittsburgh, PA, 1985), Vol. 39, p. 351.

    Google Scholar 

  2. Y.-W. Kim, Gamma titanium aluminides: Their status and future, JOM 47, 39-41 (1995).

    Google Scholar 

  3. J. Beddoes, W. Wallace, and M.C. de Malherbe, The technology of titanium aluminides for aerospace applications, Materials and Manufacturing Processes 7, 527-559 (1992).

    Google Scholar 

  4. W. Wallace, A.K. Koul, J.-P. Immarigeon, P. Au, and J. Beddoes, PM matures as route to aerospace alloys, Metal Powder Report, 32-39 (1994).

  5. Y.-W. Kim and D.M. Dimiduk, Progress in the understanding of gamma titanium aluminides, JOM 43, 40-47 (1991).

    Google Scholar 

  6. J. Beddoes, W. Wallace, and M.C. de Malherbe, Densification of γ-TiAl powder by hot isostatic pressing, The International Journal of Powder Metallurgy 28, 313-325 (1992).

    Google Scholar 

  7. L. Zhao, J. Beddoes, and W. Wallace, The deformation and dynamic recrystallization in a hot isostatically pressed Ti-48Al-2W powder alloy, High-Temperature Ordered Intermetallic Alloys V, edited by I. Baker, R. Darolia, J.D. Whittenberger, and M.H. Yoo (MRS, Pittsburgh, PA, 1993), Vol. 288, p. 921.

    Google Scholar 

  8. W. Wallace, L. Zhao, J. Beddoes, and D. Morphy, Densification and microstructural control of near γ-TiAl intermetallic powders by HIPing, Hot Isostatic Pressing '93, edited by L. Delaey and H. Tas (Elsevier Science B.V., Amsterdam, Netherlands, 1994), p. 99.

    Google Scholar 

  9. L. Zhao, J. Beddoes, D. Morphy, and W. Wallace, Effect of HIP conditions on the microstructure of a near γ-TiAl + W powder alloy, Materials and Manufacturing Processes 9, 695-707 (1994).

    Google Scholar 

  10. J. Beddoes, L. Zhao, and W. Wallace, The microstructural response of near γ-TiAl + W to heat treatment, Scripta Metall. Mater. 28, 383-388 (1993).

    Google Scholar 

  11. Y.-W. Kim, Ordered intermetallic alloys, Part III: Gamma titanium aluminides, JOM 46, 30-40 (1994).

    Google Scholar 

  12. Y.-W. Kim and D.M. Dimiduk, Method to produce gamma titanium alunimide articles having improved properties, U.S. Patent: 5,226,985 (1993).

  13. L. Zhao, P. Au, J. Beddoes, and W. Wallace, Method to produce fine-grained lamellar microstructures in gamma titanium aluminides, U.S. Patent, 5, 653, 828 (1997).

  14. J. Beddoes, L. Zhao, J.-P. Immarigeon, and W. Wallace, The isothermal compression response of a near γ-TiAl + W intermetallic, Mat. Sci. Eng. A183, 211-222 (1994).

    Google Scholar 

  15. J. Beddoes, L. Zhao, and W. Wallace, High temperature compression behaviour of near γ-titanium aluminides containing additions of chromium or tungsten, Mat. Sci. Eng. A184, L11-L15 (1994).

    Google Scholar 

  16. J. Beddoes, L. Zhao, P. Au, and W. Wallace, The brittle-ductile transition in HIP consolidated near γ-TiAl + W and TiAl + Cr powder alloys, Mat. Sci. Eng. A192/193, 324-332 (1995).

    Google Scholar 

  17. J. Beddoes, P. Au, L. van de Mosselaer, L. Zhao, and W. Wallace, The effect of heat treatment on the microstructure of near γ-TiAl powder alloys, Developments and Applications of New Ceramics & Metal Alloys, edited by H. Mostaghaci and R.A.L. Drew (CIM, Quebec City, Quebec, 1993), p. 435.

    Google Scholar 

  18. J. Beddoes, W. Wallace, and L. Zhao, Current understanding of the creep behaviour of near γ-titanium aluminides, Int. Mat. Rev. Vol. 40, 197-218 (1995).

    Google Scholar 

  19. J. Beddoes, L. Zhao, J. Triantafillou, P. Au, and W. Wallace, Effect of composition and lamellar microstructure on creep properties of P/M near γ-TiAl alloys, Gamma Titanium Aluminides, edited by Y.-W. Kim, R. Wagner, and M. Yamaguchi (TMS, Warrendale, PA, 1995), p. 959.

    Google Scholar 

  20. X.J. Wu, J. Beddoes, L. Zhao, and W. Wallace, A kinetics model for creep by intragranular dislocation motion, Mat. Sci. Eng. (1997), submitted.

  21. J. Triantafillou, J. Beddoes, L. Zhao, and W. Wallace, The creep properties of TiAl + W with a lamellar microstructure, Scripta Metall. Mater. 31, 1387-1392 (1994).

    Google Scholar 

  22. L. Zhao, J. Beddoes, D. Morphy, and W. Wallace, Microstructure and mechanical properties of a PM TiAl-W alloy processed by hot isostatic pressing, Mater. Sci. Eng. A192/193, 957-964 (1995).

    Google Scholar 

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Zhao, L., Beddoes, J., Au, P. et al. Evaluations of P/M Gamma Titanium Aluminides. Advanced Performance Materials 4, 421–434 (1997). https://doi.org/10.1023/A:1008600712578

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  • DOI: https://doi.org/10.1023/A:1008600712578

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