A5014552128- Intermetallics and Advanced Alloy Properties
- Material Properties and Applications
- High-Temperature Coating Behaviors
- Advanced Welding Techniques Analysis
- Titanium Alloys Microstructure and Properties
- Polymer Science and Applications
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Advanced ceramic materials synthesis
- Surface Treatment and Coatings
- Material Properties and Failure Mechanisms
- Silicone and Siloxane Chemistry
- Aluminum Alloys Composites Properties
- Engineering and Environmental Studies
- Energetic Materials and Combustion
- Welding Techniques and Residual Stresses
- High Temperature Alloys and Creep
- Synthesis and properties of polymers
- Tribology and Wear Analysis
- Metal Alloys Wear and Properties
- Industrial Engineering and Technologies
- Advanced Materials Characterization Techniques
- Epoxy Resin Curing Processes
- High-Velocity Impact and Material Behavior
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
Volgograd State Technical University
2015-2024
Ural Federal University
2020
OAO VNIPIneft (Russia)
1982
Institute of Glass
1973
The structure and phase composition of coatings formed on the surface EP648 alloy were studied using hot-dip aluminizing method with subsequent heat treatment. Aluminizing allows one to form a continuous aluminide coating clearly distinguishable layered structure, in which upper layer is represented by (Al) eutectic inclusions, middle consists intermetallics mixture, thin boundary has φ + κ / Ni 2 Al 3 (Cr) structure. Treatment aluminized at 1100 °C get rid an intermetallic due diffusion...
The results of studies explosively welded NiCr-alloy (Cr20Ni80) + titanium alloy (OT4/VT20) composites are presented. main parameters explosive welding have been calculated. wavy profile and peel strength after in various modes was determined. It is shown that the change structure properties joint due to both initial hardness collision point velocity. established molten metal heterogeneous mixtures based on Ni(Cr,Ti) Ti(Ni,Al) solid solutions NiTi Ni3Ti intermetallics. FEM modeling carried...
The effect of isothermal annealing at 1100°C on the kinetics phase transitions in coatings system Ni-Al, obtained by complex technology, is studied. cyclic heat resistance coating investigated 1100°C.
Abstract The features of hot-dip aluminizing the EP33 alloy were studied and structure transformation resulting coating during high-temperature treatment was investigated. Aluminizing leads to formation a continuous 120 μm thick coating, consisting an aluminum matrix with Cr 2 Al1 3 intermetallic compound inclusions layer FeAl along boundary substrate. Heat aluminized at 1100 °C ensures layered structure. phase composition from surface substrate changes in following sequence:...
The paper considers the issues of interaction molten metal at interface explosively welded NiCr/titanium alloy laminated composites with reaction zone formed during heat treatment, as well features its destruction after welding. It was established that is a heterogeneous mixture based on Ni(Cr,Ti) and Ti(Ni,Al) solid solutions NiTi Ni3Ti intermetallic compounds. estimated existence time areas in liquid state ~10−8–10−11 s. obtained values are comparable unloading wave arrival contact...
The transformation of the structure, phase and chemical composition diffusion coatings system Al-Ni Al-Cr-Ni at 1100 °C is studied. It shown that redistribution Al by coating thickness during heat treatment slower in than binary Al-Ni.
Abstract This paper describes the method and results of calculation service lifetime layered heat-resistant Ni-Al Ni-Cr-Al coatings by known empirical methods. It is shown, that alloying system Cr leads to a five-fold increase durability at high temperatures.
Changes of structure, phase composition and microhardness in high-strength α + β titanium alloy were investigated after electromechanical treatment (EMT) subsequent aging. The EMT was performed with alternating current density (j 300 600 A/mm2). aging upon heating at °C exposure for 14 h. Methods scanning electron microscopy, X-ray micro spectral durometric analyses used. Modified layers (up to 200–250 µm depth) on the surface formed due intensive thermo-deformation during following...
Abstract The diffusion interaction at the interlayer boundary of Cr15Al5 alloy during aluminizing by hot-dip in a molten bath AK12M2 silumin is investigated. It shown that subsequent heat treatment 1000 °C leads to formation on surface coating variable composition based iron aluminides FeAl(Cr, Si) / Fe 3 Al(Cr, Fe(Al, Cr, Si). Grain growth and decrease density carbide inclusions with their segregation along grain boundaries ensures its microhardness compared as-received condition from 2.1 1.6 GPa.
The paper shows the transformation of structure and phase composition layered coating system Al-Cr-Ni, obtained by heat treatment multilayered composite H20N80+AD1, welded explosion, in time range 1-300 hours. cyclic resistance at 1150 ° C is studied.
The phase composition of molten metal in explosion-welded AD1 + NP2 laminated composite is investigated and the transformation during heat treatment studied. equations linking growth kinetics diffusion zone with energy consumption explosion welding are derived.
The paper presents the research of chemical and phase composition zone diffusion interaction in layered composite Cr20Ni80-AD1. It is shown that interlayer border bimetal Cr20Ni80-AD1 a complex mixture phases with main its solid-phase interaction: Al3Ni2 Al14.687Cr3.443Ni0.87, liquid - Al3Ni2, Al0.987Cr0.017, Al14.687Cr3.44Ni0.87 Al45Cr7. shown, conditions holding time heat treatment do not affect zone.
A technological scheme for obtaining of the protective layered coating Ni-Cr-Al system on surface copper parts is proposed. Deformation explosion welded composite material substrate M1 + alloy Cr20Ni80 aluminum AD1 in process cold pressing tuyere nose was simulated SIMULIA/Abaqus software and temperature distribution over profile three-layer wall M1-Cr20Ni80-coating under conditions stabilization at background 1600°С DEFORM-2D software.
The inter-reaction mechanism of ingot iron with a molten aluminum is proposed and experimentally confirmed. It shown that the three-layer coating formed on surface under conditions liquid-phase consists bund interlayers Fe 2 Al 5 FeAl 3 intermetallics heterogeneous structure based solid solution . micro-hardness structural components ranges from 1 (for (Fe)) to 6–9 GPA +Al (Fe)). An increase in exposure time during heat treatment accompanied by an quantity structurally free (Fe) fragments...
In this study the impact of isothermal annealing on phase transformation rate in laminated Ni/Ni2Al3 composite was investigated. The method nickel-aluminide coatings required chemical composition fabrication proposed.