A5085241017- Quasicrystal Structures and Properties
- Metallic Glasses and Amorphous Alloys
- Surface Treatment and Coatings
- Metal Alloys Wear and Properties
- Material Properties and Applications
- High Entropy Alloys Studies
- Laser Material Processing Techniques
- Microstructure and Mechanical Properties of Steels
- Additive Manufacturing Materials and Processes
- Mineralogy and Gemology Studies
- Material Properties and Failure Mechanisms
- High-Temperature Coating Behaviors
- Metallurgical and Alloy Processes
- Surface Roughness and Optical Measurements
- Phase-change materials and chalcogenides
- Intermetallics and Advanced Alloy Properties
- X-ray Diffraction in Crystallography
- Metal and Thin Film Mechanics
- Laser-Ablation Synthesis of Nanoparticles
- Semiconductor materials and interfaces
- Nuclear Materials and Properties
- Silicon Nanostructures and Photoluminescence
- Welding Techniques and Residual Stresses
- Engineering Diagnostics and Reliability
- Cultural Heritage Materials Analysis
National University Zaporizhzhia Polytechnic
2019-2024
Zaporizhzhya National University
2009-2023
Zaporizhia State Medical and Pharmaceutical University
1995-2008
The structure evolution of amorphous metallic alloys during different kinds thermal effects is an important problem disordered systems physics. A precise evolutional model would allow predicting the formation such a structural state, providing necessary physical and mechanical alloy properties.The paper devoted to modelling explosive crystallisation process in metal glasses induced by laser, supplemented experimental results.A theoretical laser-induced proposed. pulse laser heating method...
The structural-phase state of the surface layers heat-resistant twophase titanium alloy VT-8 after laser treatment in different gaseous environments is studied by XRD and metallographic analyses.It found out that melting atmospheres argon, nitrogen air leads to structural changes layers, which their microhardness increase.It shown during an argon atmosphere a complete polymorphic β → α′-transformation martensitic mechanism occurs, together with raising degree structure dispersion increase...
Using the time dependent nucleation theory, temperature dependences of heterogeneous for multicomponent substitution solid solutions, formation which is typical high-entropy alloys in Al–Co–Cr–Fe–Ni systems obtained by laser alloying, were calculated. It established that taking into account melt cooling rate leads to an increase minimum time. The rates at BCC (B2) and FCC phases critical radius nucleus not formed are estimated. intervals single-phase - or two-phase (BCC + FCC) influence...
Методами рентгеновского фазового и металлографического анализов исследована структура поверхностных слоёв доэвтектического силумина после лазерного легирования смесью порошков меди кобальта.Показана возможность влияния на фазовый состав обработанного слоя его дисперсность путём изменения режимов излучения соотношения между легирующими компонентами в смеси
Методом рентгеноструктурного анализа исследовано влияние импульсной лазерной обработки в разных атмосферах на структурно-фазовое состояние поверхностных слоёв сплава основе циркония Э125.Показано, что лазерная обработка образцов атмосфере азота приводит к формированию нитрида ZrN и значительному возрастанию микротвёрдости слоёв.При обработке воздухе, кроме нитрида, происходит формирование двух различных модификаций оксида ZrO 2 .Лазерная аргона не новых
High-carbon steels are normally used as tool materials. The use of such for construction is limited due to their increased brittleness and poor weldability. However, it appears that high-carbon possess certain hidden reserves enhanced plasticity strength if properly heat-treated. An unconventional heat treatment was applied carbon eutectoid steel (0.8 wt.% C) in order increase its impact toughness simultaneously. Samples tensile testing were held at 800 °C different time ranges from 3 min 9...
Методами рентґенівського та металографічного аналізів досліджено структурний фазовий стани поверхневих шарів технічно чистого титану ВТ1-0 промислового титанового стопу ВТ6 після лазерної обробки в різних газоподібних середовищах режимах оплавлення.Встановлено, що лазерне оплавлення усіх випадках приводить до структурних змін шарах оброблених зразків, внаслідок чого мікротвердість оплавлених поверхонь зростає 1,3-1,4 рази (в атмосфері арґону), 3,0-3,1 повітря) 4,4-4,5 азоту).В результаті...
Modelling of lattices two-diMensional Quasi-crystalsWe propose the method for modelling quasi-periodic structures based on an algorithm being a geometrical interpretation Fibonacci-type numerical sequences.The consists in recurrent multiplication basis groups sites, which possess 10-th, 8-th or 12-th order rotational symmetry.The advantage proposed ability to operate with only two-dimensional space coordinates rather than hypothetical spaces dimension more three.The correspondence between...
Structure of zirconium after laser alloying by titanium and nickel powders mixture was investigated X-ray analysis, optical metallography scanning electron microscopy. It found that variation in chemical composition substance led to significant changes phase zone. Ultra high cooling rate from liquid state during treatment caused dispersion structure which obtained surface layers affected substantial magnification collective micro-hardness
Методами рентгенографического, металлографического, рентгеноспектрального анализов и электронной сканирующей микроскопии исследовано структурно-фазовое состояние поверхностных слоёв технического алюминия после импульсного лазерного легирования кобальтом никелем.Показана возможность формирования дисперсной гетерофазной структуры, включающей квазикристаллическую декагональную фазу, в зоне
The structural-phase state of the AlCoCrFeNi high-entropy alloy obtained by laser alloying technically pure aluminium surface layers with a mixture powders elements Fe, Co, Ni, Cr in an equiatomic ratio is investigated X-ray phase, spectral, and metallographic analyses.As shown, process formation heterophase structure, which consists ordered multicomponent substitution solid solution based on b.c.c.lattice Al 13 (Me) 4 monoclinic intermetallide, take place.As established, such structure...