Кафедра екології, теплотехніки та охорони праці (ДМетІ)

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ENG: The department of Ecology, Heat-Transfer and labour protection (DMetI)

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Development of a Mathematical Model for the Energy Balance of the Laser Cladding Process of Metallic Powders with a Coaxial Nozzle
(MM Publishing s.r.o., Praha, Czechia, 2024) Karakash, Yevhen O.; Rimar, Miroslav; Karpovych, Olena; Zhumar, Denys; Kizek, Jan; Fedak, Marcel; Kulikov, Andrii
ENG: Modern technologies require innovative solutions for producing complex structures from various materials. Additive manufacturing (AM) or 3D printing presents such a challenge and has significantly impacted the environment across manufacturing sectors, regardless of size. Researchers and technicians have developed new design approaches by exploring fundamental components, materials, and manufacturing processes beyond traditional frameworks, addressing global complex material and design challenges. Laser cladding of metal powders with a coaxial nozzle is one such technology, offering highly productive processes for large-scale component production. Fiber lasers are optimal for providing laser radiation, ensuring required emission quality and stability. The authors seek to develop a mathematical model for the energy balance of coaxial laser cladding of metal powders, aiming to provide an overview of energy consumption levels and unit characteristics for powder delivery, inert gas, and laser radiation sources in direct metal powder coating setups.
Modeling of Thermal Processes in DED Using SolidWorks Simulation
(Energetická konzultačná agentura n.o., Prešov, Slovak Republic, 2024) Karpovich, Olena; Zhumar, Denys; Karakash, Yevhen O.; Karpovich, Ivan
ENG: The study analyzes software products for numerical modeling of additive processes performed using SLM and DED technologies. Determining temperature fields in DMD processes is an important and complex task. Based on previously determined experimental data on the volume of molten material added during cladding, the thermal processes during laser cladding of powder materials were modeled in the SolidWorks system. This allowed determining the distribution of temperature fields on the substrate and in the cladded material over time.
Rocket Engine Vacuum Nozzle 3D Printing: Manufacturing, Weight, and Cost Savings
(MDPI AG, Basel, Switzerland, 2025) Alexopoulos, Nikolaos D.; Zeimpekis, Vasileios; Vasileiou, Evangelos; Thomaidis, Nikolaos; Souxes, Theodoros; Lazaridou, Ilona; Lutsyk, Maksym; Vorobev, Roman; Karakash, Evgeniy; Karpovich, Elena; Grydin, Olexandr
ENG: Metallic materials additive manufacturing is extremely challenging nowadays, while aircraft manufacturers are trying to adapt the newly developed technology to produce parts of complex geometry with minimum materials losses. Skyrora is a company focused on the production of several launch vehicles and rockets with the aim of becoming a commercial provider for access to space. One of the Skyrora goals is to develop innovative and long-term solutions for future growth, and, within the Horizon European project “MADE-3D”, aims to improve the rocket propulsion system of the launch vehicle Skyrora XL by exploiting multi-materials during the production phase by additive manufacturing. The main goal of the present investigation is to document the already existing production phases of the “conventional” Skyrora vacuum nozzle printed with Inconel 718 to provide a baseline in terms of weight, manufacturing cost, lead processing time and CO2 equivalent emissions of the under-development multi-material demonstrator.
Перспективи використання технологій ав для виготовлення біметалевих з’єднань
(НМетАУ, Дніпро, 2022) Карпович, Олена Володимирівна; Жумар, Денис Сергійович; Каракаш, Євген Олександрович
UKR: В цій роботі проводиться огляд різних стратегій обробки, методи визначення характеристик, проблеми та майбутні напрямки отримання біметалічних сплавів методом адитивного виробництва. Також наведено технології адитивного виробництва металів, їх проблеми, характеристики структур, фізичні властивості та майбутні перспективні напрямки розвитку.