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Regularities of decomposition of metastable phases in titanium pseudo-β-alloys
https://doi.org/10.22349/1994-6716-2024-118-2-17-27
Abstract
The results of a study of metastable phase decomposition in a titanium pseudo-β-alloy are presented. The paper considers main patterns of evolution of the structure and phase composition of a high-alloy titanium grades with a thermally unstable β-phase depending on the heat treatment mode. The influence of the isothermal holding temperature on the morphology and degree of recrystallization of the precipitating phase is shown. The results of the study indicate that low-temperature decomposition of the metastable β-phase in the alloy leads to its embrittlement.
Keywords
high-strength titanium pseudo-β-alloy,
hardening heat treatment,
structure,
microhardness,
equilibrium state,
welding thermal cycle
Supporting agencies: Experimental studies were performed on the equipment of the Center for Collective Use “Composition, Structure and Properties of Structural and Functional Materials” of the NRC “Kurchatov Institute” – CRISM “Prometey”.
About the Authors
I. R. Kozlova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
Cand Sc. (Eng).
49 Shpalernaya St, 191015 St Petersburg
E. A. Vasilieva
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
Yu. M. Markova
NRC “Kurchatov Institute” – CRISM “Prometey”
Russian Federation
Russian Federation
49 Shpalernaya St, 191015 St Petersburg
References
1. Nosova, G.I. , Fazovye prevrashcheniya v splavakh titana [Phase transformations in titanium alloys], Moscow: Metallurgiya, 1968.
2. Glazunov, S.G., Moiseev, V.N. , Titanovye splavy. Konstruktsionnye titanovye splavy [Titanium alloys. Structural titanium alloys], Moscow: Metallurgiya, 1974.
3. Polkin, I.S., Uprochnyayushchaya termicheskaya obrabotka titanovykh splavov [Hardening heat treatment of titanium alloys], Moscow: Metallurgiya, 1984.
4. Kasparova, O.V., Gelman, A.A., Polkin, I.S., Kolodkin, N.I., Kornilova, L.S. , Termicheskaya obrabotka splava VT22 [Heat treatment of VT22 alloy], Tekhnologiya legkikh splavov, 1980, No 6, pp. 102–105.
5. Moiseev, V.N., Kulikov, F.R., Kirillov, Yu.G., Sholokhova, L.V., Vaskin, Yu.V., Svarnye soedineniya titanovykh splavov (struktura i svoistva) [Welded joints of titanium alloys (structure and properties)], Moscow: Metallurgiya, 1978.
6. Mikhailov, V.I., Kozlova, I.R., Kuznetsov, S.V., Markova, Yu.M., Vasilieva, E.A., Strukturno-fazovye prevrashcheniya pri svarke vysokolegirovannogo splava titana [Structural and phase transformations during welding of high-alloy titanium alloy], Voprosy Materialovedeniya, 2021, No 3 (107), pp. 63–81.
7. Aleksandrov, V.K., Anoshkin, N.F., Bochvar, G.A . et al., Polufabrikaty iz titanovykh splavov [Semi-finished products made of titanium alloys], Moscow: Metallurgiya, 1979.
8. Khorev, A.I., Termicheskaya, termomekhanicheskaya obrabotka i teksturnoe uprochnenie svarivaemykh titanovykh splavov [Thermal, thermomechanical processing and textural hardening of welded titanium alloys], Svarochnoe proizvodstvo, 2012, No 10, pp. 11–20.
9. Khorev, A.I., Osnovy legirovaniya i termicheskoi obrabotki svarnykh soedinenii titanovykh beta-splavov [Fundamentals of alloying and heat treatment of welded joints of titanium beta-alloys], Svarochnoe proizvodstvo, 2012, No 3, pp. 31–39.
10. Shchetnikov, N.V., Savateeva, G.V., Illarionov, A.G., Raspad metastabilnogo beta-tverdogo rastvora v vysokoprochnom titanovom splave pri starenii [Decomposition of a metastable beta-solid solution in a high-strength titanium alloy during aging], Proceedings of Titan 2006 v SNG, Suzdal, 2006, pp. 224–229.
11. Chechulin, B.B., Ushakov, S.S., Razuvaeva, I.N ., Gol’dfajn, V.N. , Titanovye splavy v mashinostroenii [Titanium alloys in mechanical engineering], Leningrad: Mashinostroenie, 1977.
12. Semenova, N.M., Elektronno-mikroskopicheskoe issledovanie struktury titanovykh splavov s meta-stabilnoi beta-fazoi [Electron microscopic study of the structure of titanium alloys with a metastable beta phase]: thesis for the degree of Candidate of Sciences (Eng), Мoscow, 1972.
13. Shorshorov, M.H., Kulikov, F.R., Kirillov, Yu.G., Meshcheryakov, V.N., Vliyanie svarki i termoobrabotki na strukturu i svoistva vysokoprochnykh splavov titana [The effect of welding and heat treatment on the structure and properties of high-strength titanium alloys], Splavy titana s osobymi svoistvami, Moscow: Nauka, 1982, pp. 87–96.
14. Kozlova, I.R., Chudakov, E.V., Tretyakova, N.V., Markova, Yu.M., Vasilieva, E.A., Vliyanie termicheskoi obrabotki na formirovanie struktury i uroven mekhanicheskikh svoistv vysokolegirovannogo splava titana [The effect of heat treatment on the formation of the structure and the level of mechanical properties of a high-alloyed titanium], Voprosy Materialovedeniya, 2019, No 4 (100), pp. 28–41.
Review
For citations:
Kozlova I.R., Vasilieva E.A., Markova Yu.M. Regularities of decomposition of metastable phases in titanium pseudo-β-alloys. Voprosy Materialovedeniya. 2024;(2(118)):17-27. (In Russ.) https://doi.org/10.22349/1994-6716-2024-118-2-17-27
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