Investigation of structural and phase transformations in metastable β-titanium alloys and effect of cooling rate from homogenization temperature on structure and properties of VT47 alloy

Part 1
Kablov E.N., Nochovnaya N.A., Shiryaev A.A., Davydova E.A.
UDC
669.295
DOI
10.18577/2307-6046-2020-0-67-3-10
Article PDF (Russian) (816.37 KB)
How to cite
Kablov E.N., Nochovnaya N.A., Shiryaev A.A., Davydova E.A. Investigation of structural and phase transformations in metastable β-titanium alloys and effect of cooling rate from homogenization temperature on structure and properties of VT47 alloy. Part 1 // Proceedings of VIAM. 2020. No. 6-7. DOI: 10.18577/2307-6046-2020-0-67-3-10. URL: https://test.viam.ru/en/journal/2020/6-7/1
Keywords
phase transformations, intermediate phase, microstructure, mechanical properties, cooling rate.
Abstract

The analysis of scientific and technical literature sources has been accomplished in the field of structural and phase transformations occurring in metastable β-titanium alloys upon cooling from homogenization temperatures in the β-phase area. It has been shown that a large number of factors influence the processes which take place during cooling, as well as the structure and properties after isothermal exposures. The main factors are the chemical composition of alloy, structural and phase transformations features, and the completeness of recrystallization processes. It has been revealed that the formation of the metastable βʹ-phase or a small amount of the secondary α-phase may not have a significant effect on strength, but significantly reduce plasticity.

Reference list
  1. Titanium and titanium alloys. Fundamentals and applications. Ed. C. Leyens, M. Peters. Wiley–VCH, Germany, 2003, 513 p.
  2. Kashapov O.S., Pavlova T.V., Kalashnikov V.S., Kondrateva A.R. The influence of heat treatment conditions on structure and properties of pilot forgings from VT41 alloy with fine grained structure. Aviacionnye materialy i tehnologii, 2017, no. 3, pp. 3–7. DOI: 10.18577/2071-9140-2017-0-3-3-7.
  3. Dzunovich D.A., Lukina E.A., Yakovlev A.L. Influence of heat treatment parameters on producibility and mechani-cal properties of sheets made from high-strength titanium alloy VT23. Aviacionnye materialy i tehnologii, 2018, no. 3 (52), pp. 3–10. DOI: 10.18577/2071-9140-2018-0-3-3-10.
  4. Kablov E.N. Innovative developments of FSUE «VIAM» SSC of RF on realization of «Strategic directions of the development of materials and technologies of their processing for the period until 2030». Aviacionnye materialy i tehnologii, 2015, no. 1 (34), pp. 3–33. DOI: 10.18577/2071-9140-2015-0-1-3-33.
  5. Kablov E.N. Marketing of materials science, aircraft construction and industry: present and future. Direktor po marketingu i sbytu, 2017, no. 5-6, pp. 40–44.
  6. Yang Zhijun, Kou Hongchao, Zhang Fengshou, et al. The Effect of VAR Process Parameters on Beta Flecks Formation in Ti–10V–2Fe–3Al. Proceedings of the 12-th World Conference on Titanium «Ti-2011 Science and Technology». Beijing: Science press, 2012, vol. 1, pp. 601–604.
  7. Boyer R.R., Rack H.J., Venkatesh V. The influence of thermomechanical processing on the smooth fatigue properties of Ti–15V–3Cr–3Al–3Sn. Materials Science and Engineering: A, 1998, vol. 243, pp. 97–102.
  8. Morita T., Yoshimoto T., Maeda T., Matsumoto S. Influence of Hot-Rolling and Aging on Mechanical Properties and Fatigue Strength of Ti–20V–4Al–1Sn Alloy. Ti-2007 Science and Technology. The Japan Institute of Metals, 2007, vol. 1, pp. 555–558.
  9. El-Chaikh Ali, Schmidt Peter, Christ Hans J. Study on Beneficial Effects of Duplex Aging on Microstructure Phenomena Determining the Fatigue life of the Metastable β-titanium Alloy Ti 38-644. Proceedings of the 12-th World Conference on Titanium «Ti-2011 Science and Technology». Beijing: Science press, 2012, vol. 1, pp. 745–749.
  10. Kolli R.P., Devaraj A. A review of metastable beta titanium alloys. Metals, 2018, vol. 8, pp. 1–41.
  11. Markovskyi P.E., Ikeda M. Influence of alloying elements on the aging of economically alloyed metastable titanium beta-alloys. Material Science, 2013, vol. 49, no. 1, pp. 85–92.
  12. Ogawa M., Noda T., Ueda M., Ikeda M. Effect of cooling rate on mechanical properties of Ti–13Cr–1Fe–3Al alloy. Journal of the Japan Institute of Metals and Materials, 2008, vol. 72, no. 12, pp. 983–988.
  13. Donachie M.J. Titanium. A technical Guide. ASM International. 1988. P. 469.
  14. Tetyukhin V.V., Gribkov Yu.A., Moder N.I., Vodolazsky V.F. Investigation of structural and phase transformations in the VT35 alloy during the manufacture of thin sheets. Titan, 1996, no. 1 (9), pp. 25–29.
  15. Rhodes C.G., Paton N.E. The Influence of Microstructure on Mechanical Properties in Ti–3Al–8V–6Cr–4Mo–4Zr (Beta-C). Metallurgical Transactions A, 1977, vol. 8A, pp. 1749–1761.
  16. Schmidt P., El-Chaikh A., Christ H.-J. Effect of Duplex Aging on the Initiation and Propagation of Fatigue Cracks in the Solute-rich Metastable β Titanium Alloy Ti 38-644. Metallurgical and Materials Transactions A, 2011, vol. 42A, pp. 2652–2667.
  17. Choi G., Lee K. Effect of aging treatment on the formation of α precipitates in β-type Ti–6Mo–6V–5Cr–3Sn–2,5Zr alloys. Metals and Materials International, 2018, vol. 24, P. 441–447.
  18. Skupov A.A., Panteleev M.D., Ioda E.N., Movenko D.A. The efficiency of rare earth metals for filler materials alloying. Aviacionnye materialy i tehnologii, 2017, no. 3 (48), pp. 14–19. DOI: 10.18577/2071-9140-2017-0-3-14-19.
  19. Kablov E.N., Nochovnaya N.A., Gribkov Yu.A., Shiryaev A.A. Development of high-strength titanium pseudo-β-alloy and technologies for obtaining semi-finished products from it. Voprosy materialovedeniya, 2016, no. 3 (87), pp. 23–31.