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2018 №03 (05) DOI of Article
2018 №03 (07)

Electrometallurgy Today 2018 #03
Electrometallurgy Today (Sovremennaya Elektrometallurgiya), 2018, #3, 39-44 pages

Calculation of equilibrium diagrams of state and phase transformations

G.M. Grigorenko, V.A. Kostin, S.G. Grigorenko

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Basing on the CALPHAD methodology a method of construction of an equilibrium diagram of state and thermokinetic diagram of transformation of intermetallic alloy of Ti–Al system was suggested. The effect of aluminium on temperature of transformation of titanium intermetallic Ti3Al was determined. It was shown that with increase of aluminium content in intermetallic Ti3Al from 10 up to 29 at. % the temperature of beginning of β-Ti→Ti3Al transformation is increased from 520 up to 1170 °С. The further increase in aluminium content in intermetallic from 29 up to 40 аt. % leads to negligible decrease in initial temperature of transformation to 1140 °С. The developed method can be applied for modeling of thermokinetic diagrams of anisothermic transformations in complex titanium alloys. 13 Ref., 6 Fig.
Key words: titanium alloys; intermetallics; titanium aluminides; phase transformations; Gleeble 3800; regression analysis
Received:                20.06.18
Published:               01.10.18

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