Actual problems of Mathematics, Physics and Mecanics
Actual problems in modern technical sciences
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URBANIZATION AND INFRASTRUCTURE DEVELOPMENT: A CATALYST FOR MODERN URBAN LIFE
This article explores the growing interdependence between urbanization and infrastructure development in the context of global and regional urban growth. As cities expand and populations migrate from rural to urban areas, the pressure on transportation systems, housing, sanitation, and energy...
3 April 2025, 21:50
THE ROLE OF NICKEL ATOM CLUSTERING IN MODIFYING THE ELECTROPHYSICAL BEHAVIOR OF POLYCRYSTALLINE SILICON
This article investigates the impact of nickel atom clustering, introduced via diffusion into polycrystalline silicon, on its electrophysical properties. The samples were mechanically and chemically treated, followed by nickel deposition and thermal diffusion at 1000 °C. Schottky diodes were...
3 April 2025, 21:50
PREPARATION OF A GEAR WHEEL COMPONENT FROM POWDER MATERIALS AND INVESTIGATION OF ITS PROPERTIES
This study focuses on the fabrication of a gear wheel component using powder metallurgy techniques and the subsequent evaluation of its mechanical and physical properties. Powder materials were selected and compacted into the desired gear geometry, followed by sintering under controlled conditions....
3 April 2025, 21:50
ANALYSIS OF IDENTIFICATION METHODS OF NON-METALLIC INCLUSIONS IN STEEL GRADE 110G13L
The article discusses methods for identifying non-metallic inclusions in 110G13L steel. Particular attention is paid to the electrolytic extraction method, which allows the identification of oxides, sulfides, and nitrides. Various methods for analyzing inclusions are considered, including...
3 March 2025, 21:50
MICROSTRUCTURAL PROPERTIES OF COPPER-GRAPHITE COMPOSITES PREPARED BY COLD PRESSING METHOD
This study investigates the fabrication and characterization of coppergraphite (CuGr) composites with varying graphite content (10, 20, and 30 wt.%) for potential applications in electrical contacts, such as pantograph sliders for high-speed trains. The composites were prepared using mechanical...
3 March 2025, 21:50
DISTRIBUTION OF RESIDUAL POROSITY BY HEIGHT IN VARIOUS SCHEMES OF PRESSING BUSHINGS FROM POWDERS
This study investigates the influence of pressing schemes on the distribution of residual porosity in powder metallurgy products, focusing on onesided and two-sided cold pressing methods. Using analytical modeling, the distribution of porosity along the height of a bushing-shaped compact is...
3 March 2025, 21:50
DEVELOPMENT AND CURRENT STATE OF THE PASSENGER TRANSPORT SYSTEM IN RAIL TRANSPORT
The study of the organization of passenger transport rail transport in the state currently consists of identifying a number of important aspects that affect the quality of service provided. The development of e-commerce in the field of rail transport and the use of modern e-commerce technologies...
3 March 2025, 21:50
PROSPECTS FOR MANUFACTURING MODERN STRUCTURAL MATERIALS BASED ON IRON POWDER
This article analyzes modern technologies used in obtaining structural materials based on iron powder with high physical-mechanical and operational properties. It examines raw powder materials, practical and scientific results achieved in the field, and existing challenges in this area....
3 March 2025, 21:50
DEVELOPMENT AND IMPLEMENTATION OF A SPECIAL DISC MODULAR CUTTER FOR SHAPING THREADS TO TRAPEZOIDAL PROFILES ON INTERNAL SURFACES
The article examines the development and implementation of a special disc cutter for shaping threads on trapezoidal profiles in holes of complexconfiguration housing parts made of structural steels and cast iron under the conditions of the “GIDRO STANKO SERVIS” LLC production base....
3 March 2025, 21:50
INFLUENCE OF POWDER PRESSING SCHEME ON THE STRESS-STRAIN STATE OF BUSHING-TYPE PRESS BRIQUETTE
This study investigates the compaction of iron-based powders to produce high-density components with enhanced mechanical properties. A mathematical model analyzes stress distribution, porosity, and deformation under different pressing schemes, considering the influence of external friction. The...
3 March 2025, 21:50