Vol.23, No.2, 2023, pp. 185–189
UDC:

In this work, modelling of thermodynamic processes of excess phase separation is carried out using the CALPHAD method as well as the study of the morphology and distribution of chemical elements in carbides depending on the alloying on a scanning electron microscope REM-106I. It has been established that in carbides of the Ni-11.5Cr-5Co-3.6Al-4.5Ti-7W-0.8Mo-0.06C system, there is a tendency to recrystallize depending on the level of alloying elements. Mathematical dependences are established of the alloying influence on the temperature of precipitation (dissolution) of carbides, and the influence of change in alloy chemical composition on the composition of carbides. The obtained dependences are confirmed experimentally using X-ray spectroscopy on nickel-based superalloys. It is recommended to use the obtained mathematical models not only in the design of new nickel-based superalloys but also in the improvement of known compositions within the stated concentrations.

Keywords: nickel-based superalloy, morphology, composition of carbides, precipitation (dissolution) temperatures of carbides