Department of concentrated energy influences
Head of the Department
Lykhoshva Valeriy
Doctor of Technical Sciences, Professor
Orcid ID: https://orcid.org/0000-0003-3396-9793, Scopus ID 57201665871
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., (044) 424-32-30
Staff
The total number of employees is 15 (12 scientific employees, 3 technical employees)
Shatrave Oleksandr - Senior Researcher, Candidate of Technical Sciences (Ph. D.)
Orcid ID: https://orcid.org/0009-0007-2972-1329, Scopus ID 6504022162
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. (044) 424-24-22
Tymoshenko Andrii - Senior Researcher, Candidate of Technical Sciences (Ph. D.)
Orcid ID: https://orcid.org/0000-0003-4038-1744, Scopus ID 57302355900,
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This email address is being protected from spambots. You need JavaScript enabled to view it. Olena - Researcher, Candidate of Technical Sciences (Ph. D.)
Orcid ID: https://orcid.org/0009-0003-4595-3948, Scopus ID 57205019018
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Nadashkevich Roman - Researcher
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Kudriavchenko Mykola - Researcher
Orcid ID: https://orcid.org/0009-0001-6406-6901, Scopus ID 6507526869,
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Glushkov Dmytro - Junior Researcher
Orcid ID: https://orcid.org/0000-0002-9712-2930, Scopus ID 57220419271,
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Shmatko Oleksandr - Junior Researcher
Orcid ID: https://orcid.org/0000-0002-7694-4142, Scopus ID 57214116535
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The main areas of activity of the department
- fundamental investigations of the nature of the interaction of metal melts of ferrous and non-ferrous metals and alloys with solid metal and non-metal surfaces, which occur in foundry and metallurgical processes with the additional effect of laser, plasma, SHS energy and an electromagnetic field. Theoretical and practical implementation of a hybrid combination of foundry technological processes and processing with concentrated energy sources to increase productivity by combining the advantages of each of them.
- application of multiphysics methods of numerical simulation modeling of physical processes that occur under the action of technological equipment and in the conditions of technological processes. Creation of mathematical models that describe the flow of gas and hydrodynamic, thermal, mechanical and electrophysical processes within hybrid technologies.
- theoretical and practical investigations of physico-chemical, hydrodynamic, heat and mass transfer processes in the formation of composite and bimetallic castings using new hybrid casting-laser, casting-plasma and casting-SHS methods, as well as the use of electromagnetic fields and the creation of new high-performance technologies, equipment and materials on this base.
- determination of new technological trends and technological schemes aimed at solving the problems of creating new processing methods in metallurgical and foundry processes. Development, improvement and implementation of discrete foundry and continuous hybrid processes for obtaining bimetallic, multilayer and composite materials, creation of the new technologies and equipment.
The most significant achievements in scientific and practical activities
- Induction, laser, plasma, and combined methods, along with their technological schemes, have been developed. These methods use sequential and hybrid actions of various energy sources in the foundry process for manufacturing bimetallic iron-carbon and non-ferrous products. It has been established that the use of combined induction-laser and induction-plasma heating reduces the overall unevenness of the thermal field and ensures the processing of the workpiece, if necessary, without melting, with partial melting, or complete melting of its surface. This determines different mechanisms for forming a connection between the materials of the workpiece and the poured melt.
- The possibility of creating a hybrid continuous method for producing a bimetallic (steel-cast iron) billet by pouring liquid metal (cast iron) onto a preheated solid steel base-substrate has been theoretically substantiated, mathematically calculated, and experimentally confirmed. The required heating rate and the necessary distribution of the thermal field within it have been ensured.
- Using multiphysics methods of numerical modeling, calculations of the temperature and the duration of the liquid phase in the contact zone were conducted based on the study of melt movement velocities during the pouring process and changes in the thermal field of the bimetallic system. It was determined that during the pouring of liquid metal onto the substrate, the temperature at the contact points remains nearly constant. A significant decrease in temperature begins once the melt movement comes to a halt.
- Based on the study of the hydrodynamic and thermal conditions in the contact zone between layers, both in the casting and in the continuous hybrid process of forming a bimetallic product, obtained by pouring liquid cast iron onto a solid steel substrate in a casting mold or in a continuous bimetallic billet production apparatus, it has been established that the duration of the liquid phase in the contact zone is a significant factor determining the conditions of formation, the thickness of the transition layer, and the strength of the diffusion bond.
- A hybrid foundry-SHS (Self-propagating High-temperature Synthesis) method has been developed for producing flat, thin-walled bimetallic products with enhanced wear resistance. The optimal chemical, fractional, and quantitative composition of the thermite mixture has been determined as factors influencing heat generation and the propagation speed of the combustion wave during the process of obtaining flat, thin-walled bimetallic products. Based on the created mathematical model of physical processes in the combustion of thermite mixtures under various ignition scenarios, quantitative characteristics of heat generation have been calculated. Temperature parameters of mixture combustion have been investigated for double-sided, four-sided ignition, and ignition at the center. Under the given initial conditions, calculations have been conducted for temperature changes over time on the upper and lower surfaces of the plate and at the center before pouring, during pouring, and after pouring the molten metal onto the substrate surface.
Promising developments
- A series of technologies for production bimetallic billets in the foundry process of manufacturing bimetallic products based on iron-carbon and non-ferrous alloys has been developed using combined processing methods with the use of sequential or hybrid action of different energy sources. For various combinations of materials in the bimetallic pair with different chemical compositions, it is envisaged to ensure uniform heating of the substrate with the necessary temperature-time characteristics at each point of energy influence, which ensures the formation of a reliable bimetallic bond between the layers.
