Evolution of Phase Composition and Thermal Expansion during Heating of VT23 Titanium Alloy

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Abstract:

Changes in thermal expansion during heating of hot-extruded tube made of VT23 titanium alloy (Ti-5.45 Al-4.7 V-2.45 Mo-1.1 Cr-0.7 Fe, wt. %) were analyzed. The volume effect of α→β-transformation, β-transus temperature as well as the volume fraction of α-and β-phase formed during heating were calculated based on the received data of dilatometric analysis. Results obtained were compared to thermodynamic calculations and published data. The change in the CTE value of VT23 alloy upon heating to 975 °C was estimated, and the explanation of different CTE values obtained in the present study and published data was proposed.

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Materials Science Forum (Volume 1052)

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147-153

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February 2022

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© 2022 Trans Tech Publications Ltd. All Rights Reserved

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