МОДЕЛИРОВАНИЕ ФИЗИЧЕСКИХ ПРОЦЕССОВ СОЗДАНИЯ МАТЕРИАЛОВ

Abstract

Improving the mechanical properties of metals and alloys is at the heart of the efforts of materials scientists and metallurgists to ensure the reliability of modern structural materials under various conditions. The specificity of the material of the Al-Fe-Si system with a content of each component of more than 5% makes it impossible to obtain the material by traditional casting. Additive manufacturing of materials is a new promising direction, which, thanks to the thermal effect, effectively creates multicomponent systems with favorable properties. This work is devoted to the processes of modeling physical processes, in particular, obtaining a phase diagram of the state of the cermet material of the Al-Fe-Si system in the ThermoCalc software package. The relevance of the study is determined by the development of a technology for obtaining material with a given composition and properties by additive methods, the use of a flux minimizes the waste of charge elements and eliminates oxidation at high temperatures. At the same time, the high temperatures achieved during the implementation of the synthesis ensure the full formation of the required phase composition. The purpose of this study is to model a multicomponent Al-Fe-Si system with its further testing. The temperature conditions for the formation of phases in a material with a composition of 60–90 wt % aluminum, 0–30 wt % iron, with a constant silicon content of 10 % are considered. This composition is characterized by the formation of one ternary compound with a highly symmetrical type of crystal lattice - the α-AlFeSi phase, while this phase exists in the temperature range of 950°C - 400°C. The results obtained predict the susceptibility of the material to plastic deformation, but exclusively using heating to the temperature of the predominance of the α-AlFeSi phase. The results of the physical experiment are in good agreement with the obtained simulation results. After synthesis, the material has a characteristic cast microstructure. The data obtained make it possible to select the technological conditions necessary for further processing of the obtained material.