Russian Journal of Non-Ferrous Metals

, Volume 60, Issue 2, pp 186–193 | Cite as

Selective Laser Melting of the Intermetallic Titanium Alloy

  • A. A. PopovichEmail author
  • V. Sh. SufiiarovEmail author
  • I. A. PolozovEmail author
  • A. V. GrigorievEmail author


The in situ synthesis of the Ti2AlNb-based intermetallic alloy was studied using selective laser melting of powder materials. The object of research was the Ti–22Al–25Nb (at %) alloy, the main phase of which is the Ti2AlNb intermetallic compound with an ordered orthorhombic lattice (O phase). The Ti–22Al–25Nb alloy has high mechanical properties both at room temperature and at elevated temperatures, as well as a low specific weight, and is considered a promising material for use in the aerospace industry. To perform the experiments, a mechanical mixture of pure powders of titanium, aluminum, and niobium in a ratio necessary to synthesize the Ti–22Al–25Nb alloy was used. Selective laser melting relating to additive technologies is most promising to fabricate parts by the layer-by-layer addition of materials. The use of this technology makes it possible to fabricate complexly shaped parts based on the CAD model data. Compact samples for the investigation are performed by selective laser melting. The microstructure, density, phase composition, and microhardness of these samples are investigated. The influence of the thermal treatment in the form of homogenization at 1250°C for 2.5 h and subsequent aging at 900°C for 24 h on the microstructure, phase composition, and chemical homogeneity of the samples is also investigated. It is shown that the compact material formed by selective laser melting contains unmolten niobium particles. Homogenizing annealing makes it possible to attain the complete dissolution these particles in the material; due to this, the material microstructure consists of B2 phase grains of various sizes and needlelike precipitates of the orthorhombic phase.


additive technologies selective laser melting powder metallurgy titanium alloys intermetallic alloy orthorhombic alloy 



  1. 1.
    Lütjering, G. and Williams, J.C., Titanium, Berlin–Heidelberg: Springer, 2007, 2nd ed.Google Scholar
  2. 2.
    Kim, Y.-W., Ordered intermetallic alloys. Pt. III: Gamma titanium aluminides, JOM, 1994, vol. 46, pp. 30–39.CrossRefGoogle Scholar
  3. 3.
    Gogia, A.K., Nandy, T.K., Banerjee, D., Carisey, T., Strudel, J.L., and Franchet, J.M., Microstructure and mechanical properties of orthorhombic alloys in the Ti–Al–Nb system, Intermetallics, 1998, vol. 6, pp. 741–748.CrossRefGoogle Scholar
  4. 4.
    Chen, W., Li, J.W., Xu, L., and Lu, B., Development of Ti2AlNb alloys: opportunities and challenges, Adv. Mater. Proc., 2014, vol. 172, pp. 23–27.Google Scholar
  5. 5.
    Appel, F., Paul, J.D.H., and Oehring, M., Gamma Titanium Aluminide Alloys: Science and Technology, Wiley, 2011.CrossRefGoogle Scholar
  6. 6.
    Popovich, A. and Sufiiarov, V., Metal powder additive manufacturing: Chapter 10, in: New Trends in 3D Printing, London: InTech, 2016, pp. 215–236.Google Scholar
  7. 7.
    Smelov, V.G., Sotov, A.V., Agapovichev, A.V., and Tomilina, T.M., Selective laser melting of metal powder of steel 3161, IOP Conf. Series: Mater. Sci. Eng., 2016, vol. 142, no. 1, p. 012071.CrossRefGoogle Scholar
  8. 8.
    Popovich, A., Sufiiarov, V., Polozov, I., Borisov, E., Masaylo, D., and Orlov, A., Microstructure and mechanical properties of additive manufactured copper alloy, Mater. Lett., 2016, vol. 179, pp. 38–41.CrossRefGoogle Scholar
  9. 9.
    Holzweissig, M.J., Taube, A., Brenne, F., Schaper, M., and Niendorf, T., Microstructural characterization and mechanical performance of hot work tool steel processed by selective laser melting, Metall. Mater. Trans. B, 2015, vol. 46, no. 2, pp. 545–549.CrossRefGoogle Scholar
  10. 10.
    Popovich, A., Sufiiarov, V., Borisov, E., and Polozov, I., Microstructure and mechanical properties of Ti–6Al–4V manufactured by SLM, Key Eng. Mater., 2015, vols. 651–653, pp. 677–682.Google Scholar
  11. 11.
    Wang, G., Yang, J., and Jiao, X., Microstructure and mechanical properties of Ti–22Al–25Nb alloy fabricated by elemental powder metallurgy, Mater. Sci. Eng. A, 2016, vol. 654, pp. 69–76.CrossRefGoogle Scholar
  12. 12.
    Froes, F.H., Mashl, S.J., Hebeisen, J.C., Moxson, V.S., and Duz, V., The technologies of titanium powder metallurgy, JOM, 2004, vol. 56, pp. 46–48.CrossRefGoogle Scholar
  13. 13.
    Wang, Y.H., Lin, J.P., He, Y.H., Wang, Y.L., Lin, Z., and Chen, G.L., Reaction mechanism in high Nb containing TiAl alloy by elemental powder metallurgy, Trans. Nonfer. Met. Soc. China (Eng. ed.), 2006, vol. 16, pp. 853–857.Google Scholar
  14. 14.
    Fischer, M., Joguet, D., Robin, G., Peltier, L., and Laheurte, P., In situ elaboration of a binary Ti–26Nb alloy by selective laser melting of elemental titanium and niobium mixed powders, Mater. Sci. Eng. C, 2016, vol. 62, pp. 852–859.CrossRefGoogle Scholar
  15. 15.
    Zhang, B., Chen, J., and Coddet, C., Microstructure and transformation behavior of in-situ shape memory alloys by selective laser melting Ti–Ni mixed powder, J. Mater. Sci. Technol., 2013, vol. 29, pp. 863–867.CrossRefGoogle Scholar
  16. 16.
    Vrancken, B., Thijs, L., Kruth, J.-P., and Humbeeck, J. Van., Microstructure and mechanical properties of a novel titanium metallic composite by selective laser melting, Acta Mater., 2014, vol. 68, pp. 150–158.CrossRefGoogle Scholar
  17. 17.
    Murr, L.E., Gaytan, S.M., Ceylan, A., Martinez, E., Martinez, J.L., Hernandez, D.H., Machado, B.I., Ramirez, D.A., Medina, F., Collins, S., and Wicker, R.B., Characterization of titanium aluminide alloy components fabricated by additive manufacturing using electron beam melting, Acta Mater., 2010, vol. 58, pp. 1887–1894.CrossRefGoogle Scholar
  18. 18.
    Schwerdtfeger, J. and Kӧrner, C., Selective electron beam melting of Ti–48Al–2Nb–2Cr: Microstructure and aluminum loss, Intermetallics, 2014, vol. 49, pp. 29–35.CrossRefGoogle Scholar
  19. 19.
    Biamino, S., Penna, A., Ackelid, U., Sabbadini, S., Tassa, O., Fino, P., Pavese, M., Gennaro, P., and Badini, C., Electron beam melting of Ti–48Al–2Nb–2Cr alloy: Microstructure and mechanical properties investigation, Intermetallics, 2011, vol. 19, pp. 776–781.CrossRefGoogle Scholar
  20. 20.
    Gussone, J., Hagedorn, Y.-C., Gherekhloo, H., Kasperovich, G., Merzouk, T., and Hausmann, J., Microstructure of γ-titanium aluminide processed by selected laser melting at elevated temperatures, Intermetallics, 2015, vol. 66, pp. 33–140.CrossRefGoogle Scholar
  21. 21.
    Li, W., Liu, J., Wen, S., Wei, Q., Yan, C., and Shi, Y., Crystal orientation, crystallographic texture and phase evolution in the Ti–45–2Cr–5Nb alloy processed by selective laser melting, Mater. Charact., 2016, vol. 113, pp. 125–133.CrossRefGoogle Scholar
  22. 22.
    Peng, J., Mao, Y., Li, S., and Sun, X., Microstructure controlling by heat treatment and complex processing for Ti2AlNb based alloys, Mater. Sci. Eng. A, 2001, vol. 299, pp. 75–80.CrossRefGoogle Scholar
  23. 23.
    Jia, J., Zhang, K., and Jiang, S., Microstructure and mechanical properties of Ti–22Al–25Nb alloy fabricated by vacuum hot pressing sintering, Mater. Sci. Eng. A, 2014, vol. 616, pp. 93–98.CrossRefGoogle Scholar
  24. 24.
    Wu, J., Xu, L., Lu, Z., Lu, B., Cui, Y., and Yang, R., Microstructure design and heat response of powder metallurgy Ti2AlNb alloys, J. Mater. Sci. Technol., 2015, vol. 31, pp. 1251–1257.CrossRefGoogle Scholar

Copyright information

© Allerton Press, Inc. 2019

Authors and Affiliations

  1. 1.Peter the Great St. Petersburg Polytechnic UniversitySt. PetersburgRussia
  2. 2.OAO KlimovSt. PetersburgRussia

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