SEM, 2018, #3, 32-38 pages
Properties of alloys on titanium aluminide γ-TiAl/α2-Ti3Al base at complex alloying
Journal Современная электрометаллургия
Publisher International Association «Welding»
ISSN 2415-8445 (print)
Issue № 3, 2018 (October)
S.A. Firstov1, I.D. Gornaya1, Yu.N. Podrezov1, A.A. Bondar1, A.V. Sheremetjev2
I.N. Frantsevich Institute of Problems of Materials Science of the NAS of Ukraine.3 Krzhyzhanovsky Str., 03142, Kyiv. E-mail: email@example.com
2 Ivanov Str., 69068, Zaporozhye. E-mail: firstname.lastname@example.org
Presented are the results of study of effect of a complex alloying by Nb (3...4 %), Mo, Cr, Zr (up to 2 %), B, Y (up to 0.2 %) on mechanical properties of cast intermetallic γ-TiAl/α2
Al alloys, containing from 44.0 up to 48.5 % Al, produced by the method of vacuum arc remelting. The mechanical properties were determined at bending, uniaxial tension and compression tests. Vickers hardness and long-time hot hardness (high-temperature strength) were measured. The tests were carried out within the temperature interval of 20...800 °С. It was shown that the optimum properties during tension at 20 and 700 °С were demonstrated by the cast alloy Ti–47Al–5.5 (Nb, Cr, Mo); coefficient of elasticity was approximately 170 and 126 GPa, tensile strength was 770 and 644 MPa, ductility was 0.15 and 0.65 %, respectively. Crack resistance of this alloy is approximately 22.4 MPa∙m1/2
, long-time hot hardness at 700 °С is 2.0 GPa, that twice increases the value of hardness of high-temperature titanium alloys. 20 Ref., 5 Tabl., 1 Fig.
titanium alloys; titanium aluminides; alloying; mechanical properties; high-temperature strength
1. Clemens, H., Mayer, S. (2016) Intermetallic titanium aluminides in aerospace applications — processing, microstructure and properties. Materials at high temperatures. https://doi.org /10.1080/09603409.2016.1163792
2. Bewlay, B. P., Nag, S., Suzuki, A., Weimer, M. J. (2016) TiAl alloys in commercial aircraft engines. Ibid. https://doi.org /10.1080/09603409.2016.1183068
3. Toshimitsu Tetsui (2002) Development of a TiAl turbocharger for passenger vehicles. Sci. and Engin., A329–331, 582–588. https://doi.org /10.1016/S0921-5093(01)01584-2
4. Inozemtsev, A.A., Nikhamkin, M.A., Sandratsky, V.L. (2008) Fundamentals of design of aircraft engines and power units. Vol. 2: Gas turbine engines. Moscow, Mashinostroenie [in Russian].
5. Appel, F., Paul, J. D. H., Oehring, M. (2011) Gamma titanium aluminide alloys: Science and technology. Weinheim, Wiley-VCH Verlag GmbH & Co. KGaA.
6. Kim, Y.-W., Smarsly, W., Lin, J. et al. (2014) Gamma titanium aluminide alloys, 2014: A collection of research on innovation and commercialization of gamma alloy technology. In: of 4th Intern. Symp. on Gamma TiAl Alloys, ISGTA 2014. Hoboken (NJ), John Wiley & Sons, Inc.
7. Christoph Leyens, Manfred Peters (2003) Titanium and titanium alloys: Fundamentals and applications. Wiley-VCH Verlag GmbH & Co. KGaA.
8. Wu, X. (2006) Review of alloy and processing development of TiAl alloys. Intermetallics, 14, 1114–1122. https://doi.org /10.1016/j.intermet.2005.10.019
9. Lapin, J. (2009) TiAl-based alloys: Present status and future perspectives. Hradec nad Moravicí, Metal, 19.
10. Hu, D., Wu, X., Loretto, M. H. (2005) Advances in optimization of mechanical properties in cast TiAl alloys. Intermetallics, 13, 914–919. https://doi.org /10.1016/j.intermet.2004.12.002
11. Firstov, S.O., Gorna, I.D., Poryadchenko, N.E. et al. (2010) High-temperature properties of complex alloys based on titanium aluminides. -Khimich. Mekhanika Materialiv, 8, 145–150 [in Ukrainian].
12. Bondar, A.A., Vitusevych, V.T., Remez, M.V. et al. (2011) Structure and properties of titanium-aluminide alloys doped with niobium and tantalum. Metallurgiya, 7–8, 25–45 [in Ukrainian].
13. Podrezov, Yu.N., Remez, M.V., Gornaya, I.D. et al. (2012) Temperature dependence of mechanical properties of alloys based on TiAl intermetallics. In: Electron microscopy and strength of materials: Transact. Kiev, IPMS, 18, 57–74 [in Russian].
14. Remez, M.V., Podrezov, Yu.M., Bondar, A.A. et al. (2016) Structure and properties of TiAl-based alloys doped with niobium and chrome. Metallurgiya, 1–2, 104–112 [in Ukrainian].
15. Goltvyanytsya, S.K., Goltvyanytsya, V.S., Tsyvirko, E.I. (2006) Production of solid homogeneous ingots of titanium-aluminium alloy. Novi Materialy i Tekhnologii v Metallurgii ta Mashynobuduvanni, 1, 57–59 [in Ukrainian].
16. Borisenko, V.A. (1984) Hardness and strength of heat-resistant materials at high temperatures. Kiev, Naukova Dumka [in Russian].
17. Hu, D. (2002) Effect of boron addition on tensile ductility in lamellar TiAl alloys. Intermetallics, 10, 851–858. https://doi.org /10.1016/S0966-9795(02)00087-0
18. Wu, Y., Hwang, S. K. (2002) Microstructural refinement and improvement of mechanical properties and oxidation resistance in EPM TiAl-based intermetallics with yttrium additions. Acta Materialia, 50, 1479–1493. https://doi.org /10.1016/S1359-6454(02)00006-X
19. Gorna, I.D., Yablokova, G.V., Tinkov, V.O. et al. (2010) Effect of Y on structure and properties of cast intermetallic alloy Ti–36Al–Y. Information 1: Structure and hardness of cast alloys Ti–36Al–Y. In: Current problems of physical materials science: Transact. Kiev, IPMS, 19, 122–127 [in Ukrainian].
20. Gorna, I.D., Gorpenko, K.O., Koval, O.Yu. et al. (2008) Structure and physico-mechanical properties of alloys of Ti–Si–X system. -Khimich. Mekhanika Materialiv, 3, 35–42 [in Ukrainian].