
The work investigated the influence of heat treatment modes on the microstructure of titanium alloy VT9. The microstructure of the alloy in the initial state after high-temperature treatment in the (α+β) region and aging is represented by the α-phase of three morphologies (globular primary, lamellar secondary, finely dispersed tertiary) and the β-phase. It has been established that when varying the cooling rate in air after high-temperature treatment, the formation of a fine tertiary α-phase is observed in all cases. It has been shown that the dissolution of the tertiary α-phase occurs above 700 °C, but in this case titanium silicide particles are formed.
В работе исследовано влияние режимов термической обработки на микроструктуру титанового сплава ВТ9. Микроструктура сплава в исходном состоянии после высокотемпературной обработки в (α+β)-области и старения представлена α-фазой трех морфологий (глобулярная первичная, пластинчатая вторичная, мелкодисперсная третичная) и β-фазой. Установлено, что при варьировании скорости охлаждения на воздухе после высокотемпературной обработки во всех случаях наблюдается образование мелкодисперсной третичной α-фазы. Показано, что растворение третичной α-фазы происходит выше 700 °С, но при этом образуются частицы силицидов титана.
TERTIARY Α-PHASE, МИКРОСТРУКТУРА, ТРЕТИЧНАЯ Α-ФАЗА, VT9 TITANIUM ALLOY, СКОРОСТЬ ОХЛАЖДЕНИЯ, ТИТАНОВЫЙ СПЛАВ ВТ9, ДИФФЕРЕНЦИАЛЬНАЯ СКАНИРУЮЩАЯ КАЛОРИМЕТРИЯ, MICROSTRUCTURE, COOLING RATE, DIFFERENTIAL SCANNING CALORIMETRY
TERTIARY Α-PHASE, МИКРОСТРУКТУРА, ТРЕТИЧНАЯ Α-ФАЗА, VT9 TITANIUM ALLOY, СКОРОСТЬ ОХЛАЖДЕНИЯ, ТИТАНОВЫЙ СПЛАВ ВТ9, ДИФФЕРЕНЦИАЛЬНАЯ СКАНИРУЮЩАЯ КАЛОРИМЕТРИЯ, MICROSTRUCTURE, COOLING RATE, DIFFERENTIAL SCANNING CALORIMETRY
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