Special feature of formation of local texture of α- and β-phases in polymorphic transformation in titanium alloy VT6 are studied by orientation microscopy (EBSD). The specimens are treated by an isothermal hold in the single-phase β-range at 1065°C and cooled in water, in air, or with the furnace. The crystallographic misorientations of crystallites in the α-phase and between the α- and β-phases are studied. It is shown that a dominant shear component is typical for polymorphic transformations occurring at any cooling rate. A secondary β-phase precipitated during the cooling in the (α + β)-range differs in its orientation from the high-temperature β-phase.
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The work has been performed within a state assignment of the Ministry of Science and Higher Education of the Russian Federation (topic No. 0836-2020-0020).
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 10 – 16, July, 2022.
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Naschetnikova, I.A., Stepanov, S.I., Karabanalov, M.S. et al. Crystallographic Features of Phase Transformations in Titanium Alloy VT6. Met Sci Heat Treat 64, 363–369 (2022). https://doi.org/10.1007/s11041-022-00816-8
- titanium alloys
- phase transformations
- grain boundaries
- orientation microscopy