A5050169364- Material Properties and Applications
- Metallurgical Processes and Thermodynamics
- Material Properties and Failure Mechanisms
- Engineering Technology and Methodologies
- Metal Alloys Wear and Properties
- Engineering and Environmental Studies
- Advanced materials and composites
- Aluminum Alloy Microstructure Properties
- Advanced Materials Characterization Techniques
- High Entropy Alloys Studies
- Industrial Engineering and Technologies
- Induction Heating and Inverter Technology
- Diverse Industrial Engineering Technologies
- Metal and Thin Film Mechanics
- High-Temperature Coating Behaviors
- Advanced machining processes and optimization
- Iron and Steelmaking Processes
- Advanced Machining and Optimization Techniques
- Microstructure and Mechanical Properties of Steels
- Surface Roughness and Optical Measurements
- Computational Physics and Python Applications
- Additive Manufacturing Materials and Processes
- Electric Power Systems and Control
- Metallurgical and Alloy Processes
- Engineering Structural Analysis Methods
South Ural State University
2015-2024
Novosibirsk State University
2012
The use of various external influences to influence metal melts (vibration, ultrasound, etc.) is a known method changing the structure and properties metals alloys. In overwhelming majority, all methods action on cause grinding structure, which leads an increase in strength characteristics. paper considers new physical molten metal, namely, electromagnetic pulses. Work investigation impulse effect conducted two laboratories: Chelyabinsk (the laboratory Professor Krymsky V.V.) Khabarovsk (in...
The results of experiments on the impact high power electromagnetic pulses (EMP) metal alloy melts are discussed. A generator with following pulse parameters: amplitude 10 kV, duration 1 ns, leading edge 0.1 repetition rate kHz was used for electric treatment melts. maximum network input equals 100 watts. carried out in a furnace immediately before casting. melt by is conducted 10-15 minutes. Comparative analysis treated and untreated samples showed change structure, density, strength,...
The results of the experiments on processing metal melts by powerful electromagnetic impulses are given. generator used in has following characteristics: pulse height - 10KV, duration 1ns, leading edge 0.1ns, repetition rate 1KHz, output 100KWt. is 10-15min. comparative analysis processed and unprocessed samples changes structure, increase density, solidity, plasticity resilience cast metal. result different external physical methods alloys shows full agreement with ultrasonic metals....
There are results of industrial experiments in steel 35L treatment with electromagnetic pulses (EMP) available. The evidentiate significant improvement the complex metal mechanical properties after such treatment. theory, describing impulse action on metals is proposed herein.
The features of the growth and structure diffusion zinc coatings in process galvanizing powders with nanocrystallized surface area, alloyed iron, are studied. It is established that increase iron content powder substantially increases area solid solution at a constant speed rate layer zinc-iron phases. This effect accompanied by change morphology particles as result saturation.
The causes of the failure a high-tensile stud 2M48-6gx500 10.9 made from steel grade 30HGSA which led to temporary inoperability tower crane were investigated. bolts used assemble sections and collapsed after 45 days moment was commissioned. cracks in fracture are identified as fatigue with characteristic sites nucleation, sustainable development static dolomite. To determine possible destruction, metallographic, durometric mechanical tests carried out it follows that bolt material its...
The process of dimensional fused silica etching was offered. production molycoat by magnetron sputtering molybdenum target in inert gas (Argon) on vacuum distillation unit (NIKA-2012 TN) examined. coat quality (delamination, discontinuity) analyzed; the influence first kind internal strains type observed defects determined. research conducted means microscopic and X-ray diffraction analysis. It has been established that strain value depends flow rate, and, consequently, its pressure system...
The paper proposes the composition of saturating powder mixture and method thermal diffusion chromium plating using cumulative gratings, which ensures reliable production an increased layer on internal parts parts. presents results saturation bushings made steel 40NiCrMo4KD at a temperature 1000 °C for 24 hours nickel grating with perforation density 1 hole by 2 mm2. control elemental was carried out transverse sections in direction from surface to base metal sample JEOL JSM-6460 LV...
Pallets are used as bases for storage and handling of products from the furnace to quenching bath, loading into furnace. In manufacture pallets special attention is paid choice steel grade, preference being given high-temperature grades. produced heat-resistant by casting methods. Violation manufacturing technology reduces duration pallet operation. At considered plant broke down after four months Warpage, formation longitudinal transverse cracks, destruction individual elements occurred....
Homogenization of castings from cast aluminum alloys is a priority for improving their technological parameters. The mode homogenizing annealing regulated by two parameters – temperature and holding time. Traditionally, one or two-stage modes are used. To assess the degree homogeneity alloy after such heat treatments at enterprises, as rule, various methods mechanical testing paper proposes new method calculating criterion estimating structure using B95 an example. (γ) can be approximation...
When studying a large number of steel grinding balls, which were destroyed in the course delivery tests, an atypical structure balls’ central zone was detected. Namely, presence sites with martensitic structure, while main troostite preserved. The balls manufactured using cross rolling technology. We studied as well composition and continuous cast billets, from manufactured.
The results were shown in influence of fast heating parameters on the structure and properties cold-worked alloy AMg6 with original hot-forged structure. Based measured data, change mechanical during process short duration was evaluated. There reviewed role temperature time heat processes softening samples AMg6. stability characteristics hammer-hardened under elevated test temperatures It is that return cold-deformed range studied receive most intensive development first 5–10 minutes,...
The paper analyses the mesostructure of structural elements lattice aircraft shells – ribs consisting alternating layers equal thickness and made from unidi-rectional CFRP pure matrix material. In experimental studies, elastic characteristics unidirectional were obtained under three-point bending transversal compression. As a result, longitudinal modulus elasticity layered composite turned out to be 101 GPa, shear was 2.95 GPa. Numerical modeling meso- micromechanics interaction noticed...
The destruction of parts machines and mechanisms made carbon structural steels, as a rule, begins with surface corrosion, which can be prevented by applying protective coatings, in particular, chemical-thermal treatment. results laboratory studies on the joint thermal diffusion saturation steel 35Х2Н3 chromium nickel at temperature 1000°C for 24 hours are presented. A technique analyzing resulting coating based possibilities X-ray spectral microanalysis (EDXA) layer transverse microsections...
Processing of metal melts powerful electromagnetic impulses - a new and effective way to change the structure properties metal. Numerous experiments on ferrous non-ferrous metals have shown that such processing usually allows both increase in strength ductility. A theoretical explanation is given impact mechanism melts. The possibility convert sound waves shown.
Chemical-thermal treatment (CHT) technologies have been known and used since the 50s of last century. CHT methods traditionally include carburizing, nitriding, diffusion metallization with zinc, chromium other elements. affects chemical composition part surface, providing it required level strength properties corrosion resistance. The results authors' research show that technology thermal plating, in particular, can be significantly improved by activating work internal thermionic field...
High-entropy alloys (HEAs) consisting of five or more components in an equimolar ratio are attracting increasing attention due to a unique combination various properties. Alloying HEAs with small amounts certain elements (most often rare earth, trace noble metals) is promising way improve the characteristics such and control their This paper reports results on microstructure, phase composition, microhardness cast AgxAl0.5CoCrCuyFeNi (x = 0, 0.1; y 0.5, 1.0). The effect silver addition...
Based on the Inspec's data, results of information search carried out using specialized terms, after studying dynamics their use for 2000-2011 years publications, were diagnosed; analyses publishing interactions among SB RAS scientific centers are shown. DOI: http://dx.doi.org/10.12731/2227-930X-2012-1-13