Browsing by Author "Molchanov, Dmytro"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item type:Item,
    Assessment of Forces Acting on the Gondola Car Body during Transportation of Rolled Wire Bundles
    (Portal hrvatskih znanstvenih i stručnih časopisa - Hrčak, 2026) Shvets, Angela O.; Shaposhnyk, Vladyslav Yu.; Muradian, Leontii A.; Shvets, Anzhelika O.; Reidemeister, Oleksii H.; Shykunov, Oleksandr A.; Molchanov, Dmytro
    ENG: The article gives an assessment of the possible reasons for the fall of a gondola car wall onto the side track, which occurred on the section of the regional branch of the Pridneprovskaya Railway. To determine the possible reasons for the breakage of the car side wall, a comparison of the forces acting from the side of rolled wire bundles on the car body structure with permissible loads on the body elements was made. Vertical and transverse inertial forces and forces from the load thrust were considered as such forces. The total loads obtained as a result of the calculation do not exceed the permissible values for gondola car bodies and confirm that the considered local technical conditions for stowing rolled wire bundles met the current requirements and did not cause a breakage of the side wall of the gondola car body.
  • Thumbnail Image
    Item type:Item,
    Increasing the Corrosion Resistance of the Center Plate Unit in Railway Freight Car
    (Politechnika Lubelska, Lublin, Poland, 2025) Bulakh, Maryna; Bieniaś, Jarosław; Ostapiuk, Monika; Molchanov, Dmytro; Lunys, Olegas; Muradian, Leonty
    ENG: One of the most damage-prone components of a freight car is the center plate, which is highly susceptible to wear and corrosion. This study investigated the application of a composite coating based on a FeCrNi alloy with the addition of chromium carbide (Cr₃C₂) to protect the steel surfaces of the center plate from corrosion and mechanical degradation. The coating was applied using laser cladding and subjected to comprehensive testing, including electrochemical analysis (OCP, polarization, and electrochemical impedance spectroscopy), microhardness measurements, and microstructure evaluation using scanning electron microscopy (SEM). The results showed that the coating exhibited a stable corrosion potential, low corrosion current density, and high impedance at low frequencies, indicating good protection against ion penetration and electrode reactivity, while significantly improving the microhardness of the base material. This study demonstrates the potential of the modified FeCrNi-based coating in extending the service life, enhancing the operational reliability, and increasing the corrosion resistance of center plates in freight cars.