The effect of continuous cooling at a rate of 1.1 K/min and combined cooling with an isothermal hold at 860 – 940°C on the structure, phase composition and properties of titanium alloy VTI-4 is studied. It is shown that introduction of an isothermal hold into the cooling mode lowers the hardness and elevates the content of untransformed β-phase in the structure of the alloy. The structure of the alloy is shown to be the most homogeneous without a feature of secondary decomposition yielding fine precipitates and with a maximum content of β-phase after an isothermal hold at 800°C for 1 h.
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The study has been performed due to grant No. 22-49-02066 of the Russian Scientific Foundation (https://rscf.ru/project/22-49-02066/).
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 33 – 38, August, 2022.
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Demakov, S.L., Vodolazskii, F.V., Illarionov, A.G. et al. Effect Cooling Conditions on the Structure and Properties of Alloy VTI-4. Met Sci Heat Treat 64, 451–457 (2022). https://doi.org/10.1007/s11041-022-00830-w
- phase composition
- modulus of elasticity