bluuebunny/crossref_metadata_2025_split huggingface dataset:
Theoretical estimation, simulation and experimental evaluation of deformation-induced heating of magnesium during lateral extrusion
Authors: Komkova D A , Zamaraeva J V , Loginov Yu N , Koshevoy P S , Sokolov A L , Volkov A Yu 
Published: January 2021

Abstract
Theoretical estimation, computer simulation and experiment were performed to evaluate temperature of the deformation heating of magnesium during severe plastic deformation by lateral extrusion method. The simulation of the deformation process was carried out by DEFORM-3D. Experimental temperature measurement of magnesium deformation-induced heating at the deformation zone was made. According to the simulation, temperature of the magnesium billet has reached 114°C during deformation. Experimental results showed that the maximum temperature of deformation heating of the material is ∼140°C.
Work function of chemical compounds of aluminum-magnesium system
Authors: Khisamov R Kh , Kistanov A A , Nazarov K S , Shayakhmetov R U , Korznikova G F , Yumaguzin Yu M , Dmitriev S V , Mulyukov R R 
Published: January 2021

Abstract
For pure metals aluminum and magnesium and for chemical compounds Al3Mg, Al2Mg, AlMg and AlMg3 with crystallographic orientations (100), (110) and (111) the work function is calculated from the first principles in the framework of the density functional theory. It is shown that the dependence of the work function on the magnesium concentration in aluminium is nonlinear. The reasons for the work function differences of chemical compounds depending on the crystallographic orientation are analysed.
Mass transfer in platinum by crowdion clusters initiated by the impact of a Pt2 molecule
Authors: Shepelev I A , Dmitriev S V , Morkina A Yu , Fomin S Yu , Korznikova E A 
Published: January 2021

Abstract
This work presents a molecular dynamics study of the propagation scenario of the crowdion complex initiated in the platinum crystal by means of atom or molecule bombardment with parallel and non-parallel orientations. The obtained results enable to conclude that the crowdion initiated by the Pt2 molecule bombardment is significantly more effective for the mass transfer comparing to the crowdion excited by the single atom impact. It was detected that the atoms involved in the crowdion motion bear a vibrational mode with the frequency above the phonon spectrum. The obtained results contribute to the understanding of the mechanisms of mass transfer under equilibrium conditions.
X-ray analysis of the Cu-Zn alloys system subjected to ECAP and subsequent rolling
Authors: Zaynullina L I , Alexandrov I V 
Published: January 2021

Abstract
The results of X-ray diffraction analysis aimed to reveal the features of the evolution of microstructure parameters as a result of equal-channel-angular pressing and subsequent flat rolling of the Cu-Zn alloys system with different Zn (10 and 30 wt. %) contents and, as a result, different stacking fault energies are presented.
Mechanical properties and structure of welded joints of VT6 alloy through nanocrystalline interlayer of VT22
Authors: Mukhametrakhimov M 
Published: January 2021

Abstract
Experimental studies of the solid-phase weldability of the VT6 alloy through an interlayer of VT22 alloy in the temperature range of the low-temperature superplasticity (T=820 °C) of one of the elements to be joined have been carried out. Welding of dissimilar titanium alloys allows us to significantly reduce the temperature of pressure welding due to the use of alloys alloyed with different elements. The VT22 with nanocrystalline structure interlayer allows localizing deformation at the junction zone due to a significant difference between the values of the interlayer flow stress and welded billets. To improve the mechanical properties, the welds were heat-treated at T=900 °C. The optimal properties of welded joints are increased after the heat treatment of researched titanium alloys. This leads to the activation of diffusion processes and the disappearance of micropores. Thus, it can be concluded, that getting dissimilar titanium alloys high-quality solid-phase joint depends not only on the size of the interlayer grains but also on the material in the joint zone chemical and phase composition.
Silver nanoparticles formation over Ti-Zr-Nb alloy via polyol synthesis
Authors: Teplyakova T O , Popova D V , Prokoshkin S D , Konopatsky A S 
Published: January 2021

Abstract
Ag nanoparticles (AgNPs) were formed over the surface of novel superelastic Ti-Zr-Nb alloy via polyol synthesis at room temperature. Two synthesis media were used for AgNPs formation: ethylene glycol (EG) and polyethylene glycol (PEG-400). AgNPs formation rate in different polyols was evaluated by UV-VIS spectroscopy. Based on the obtained results higher formation rate was ascribed to PEG-400. Morphology of the material’s surface, as well as chemical composition, were analyzed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). It was demonstrated that the usage of PEG-400 as synthesis media facilitates the formation of more monodisperse AgNPs evenly distributed over the alloy’s surface.
Features of structure and physical and mechanical properties of metal-ceramic composite material depending on the content of boron nitride
Authors: Bolshakov B O , Smyslov A M 
Published: January 2021

AbstractIn this paper, the problem of structure formation in powder compacts of PCh13M2-BN obtained by solid-phase sintering is considered. A phenomenological model of the formation of regions with increased concentration of ceramic BN particles in the volume of compacts is developed. The influence of the concentration of boron nitride in the initial charge on physical and mechanical characteristics of compacts is determined.
Copper oxide nanowhiskers: structure, growth mechanisms, and associated stresses
Authors: Podlesnov E , Churkunova N V , Dorogov M V 
Published: January 2021

Abstract
A detailed study of the structure of nanowhiskers and the processes accompanying their growth during thermal oxidation are presented. The structure of nanowhiskers is studied by scanning and transmission electron microscopy and X-ray diffraction. The role of internal stresses in the substrate on the growth of nanowhiskers is shown, and the stress state for various configurations of the copper/copper oxide system is calculated. The sorption, catalytic, electrochemical, and mechanical properties of oxide nanowhiskers are described. The areas of the practical application of copper oxide nanowhiskers such as water purification systems and lithium batteries are shown.
Research and features of preliminary graphitizing processing of melt of iron with silicon carbide on the structure and properties of cast iron castings
Authors: Boldyrev D.A. , Platov S.I. , Urtsev N.V. , Terentyev D.V. , Latypov O.R. 
Published: January 2021

Abstract
The materials used for preliminary graphitizing treatment of cast iron melt (pre-modification), of which silicon carbide has the greatest technical and economic advantage, are considered. The features of the graphitizing effect of silicon carbide during the preparation of a gray cast iron melt on its structure and properties in standard cylindrical samples and clutch plate castings are analyzed. It is shown that its graphitizing effect on the cast iron melt begins to partially manifest itself already at the stage of introduction into the furnace and enhances the action of the main graphitizing modifier during subsequent ladle treatment as a result of a decrease in the content of interdendritic graphite in the microstructure.
Superplastic forming of hemispheres out of AZ61 magnesium alloy
Authors: Kruglov A A , Tulupova O P , Olimpieva N V , Ganieva V R , Enikeev F U 
Published: January 2021

Abstract
The paper proposes a method for calculating the rheological parameters included in the standard power ratio of superplasticity based on the results of test forming of hemispheres using a cylindrical matrix. The method takes into account the value of the entry radius of the matrix. The analytical model of the process is developed based on the main assumptions of the theory of thin shells, the finite element model is executed using the ANSYS10 ED software package. As compared to the traditional approach, the proposed method allows improving the modeling accuracy with an error less than 1%, not only for the forming time, but also for the thickness at the pole of the dome.
Structural and phase transformations in austenitic chromium-nickel steels during nanostructuring frictional treatment
Authors: Skorynina P A , Makarov A V , Volkova E G , Osintseva A L 
Published: January 2021

AbstractThe parameters of the structure and phase composition of austenitic structural steels subjected to frictional treatment with a sliding indenter were studied by X-ray diffraction and transmission electron microscopy. It has been found that the strengthening of deformation-stable austenitic steel was due to the formation of finely divided austenite, with the intensification of the grain-boundary and dislocation strengthening mechanisms. Additional strengthening of metastable austenitic steel was due to the formation in the surface layer of about 70% of the volume fraction of nanocrystalline strain-induced martensite. It is proposed to use nanostructuring frictional pretreatment as a promising method for hardening austenitic structural steels before the subsequent application of superhard, dead-hard, and heat-resistant nanocomposite coatings.
Influence of composition nonstoichiometry and ordering effects on the properties of ferroelectric ceramics based on lead magnoniobate
Authors: Lebedinskaya A R , Rudskaya A G 
Published: January 2021

Abstract
The effects of violation of the stoichiometry of lead magnoniobate in the preparation of compositions (1-x)PbMg1/3Nb2/3O3 – xPbMg1/2Nb1/2O2,75 with a step of 0.1 and 0≤x≤1 have been studied by X-ray diffraction methods. Differences in the unit cell parameters of the ferroelectric ceramic samples of the composition under study were found. It was shown that the effect of ordering of different types of atoms in the cells, leading to the formation of a superstructure and a doubling of the lattice period, was not observed in any of the samples. . Measurements of the dielectric constant of the synthesized samples and the tangent of the dielectric loss angle showed a violation of the Curie-Weiss law, which indicates the diffusion of the phase transition.
Superplastic behavior of a nickel-base superalloy containing topologically close-packed phases
Authors: Mukhtarov S K , Ganeev A A , Shakhov R V , Imayev V M , Logunov A V 
Published: January 2021

Abstract
Superplastic behaviour of a polycrystalline nickel-base superalloy Ni-47(Cr,Co,W,Al,Ta,Hf)-0.2(C,B) (wt.%) in the fine-grained condition obtained via thermomechanical treatment (TMT) has been studied. TMT transformed a coarse-grained as-cast structure into a homogeneous fine-grained one. Both the initial as-cast and the thermomechanically treated conditions contained not only the matrix γ phase, the hardening γ’ phase and carbides but also topologically close-packed (TCP) phases. In spite of the presence of the TCP phases, the superalloy in the fine-grained condition demonstrated superplastic properties (δ>300% and low flow stresses) at subsolvus temperatures. Superplastic deformation led to some refinement and alignment of the TCP phase particles along the tensile axis.
Influence of structural state on corrosion behaviour of bearing steel 110C-18Cr-Mo
Authors: Abramova M M , Tuktamysheva E R , Saburova Yu B , Enikeev N A 
Published: January 2021

Abstract
The paper report on the studies of the effect of severe plastic deformation on the structure and properties, including the corrosion behavior, of 110C-18Cr-Mo bearing steel. Various structural states were formed by the methods of severe plastic deformation (SPD) and subsequent heat treatment. It is shown that SPD and subsequent heat treatment lead to the formation of a homogeneous structure with a uniform distribution of carbides. In this case, heat treatment leads to a reduction of the volume fraction of carbides and an increase in the microhardness of the samples. Steel subjected to SPD demonstrates a decrease in the corrosion rate in one-molar solutions of salt and sodium hydroxide. Subsequent heat treatment leads to an additional decrease in the corrosion rate.
Interaction of supersonic 2-crowdions in fcc platinum
Authors: Bayazitov A M , Korznikova E A , Semenov A S , Borisov D I , Dmitriev S V 
Published: January 2021

Abstract
In metals subjected to ion implantation or irradiation, mass transfer by supersonic crowdion clusters takes place. The interaction between supersonic 2-crowdions moving in parallel close-packed atomic rows has been studied only in 2D Morse lattice and here it is analysed with the use of molecular dynamics simulations in fcc platinum.
Behavior of the mechanical system composed of highly deformable structural elements
Authors: Abdullina D U , Rysaeva L Kh , Korznikova E A , Dmitriev S V 
Published: January 2021

Abstract
Carbon nanotubes (CNTs) are attractive for many applications because they possess a unique combination of mechanical and physical properties. Horizontally aligned CNT bundles under lateral compression behave as an elastic body with highly deformable elements, since their cross sections can collapse. Mechanical properties of such systems is poorly investigated in spite of the fact that they are promising for vibration and shock protection. Here we use a chain model with a reduced number of degrees of freedom in order to study the behaviour of a CNT bundle under uniaxial and biaxial lateral compression. Stress-strain curves are obtained and evolution of the CNT bundle structure is analyzed.
Comparative analysis of fine-grained structure formation in an Al-Zn-Mg-Cu alloy during multidirectional isothermal forging and uniaxial compression
Authors: Sitdikov O , Sakai T 
Published: January 2021

Abstract
A comparative study of the mechanical behavior and microstructural evolution in a cast coarse-grained 7475 Al alloy during uniaxial compression and multidirectional forging at 490°C and 10–4 s–1 was performed. It was shown that high-temperature deformation of the alloy led to grain refinement accompanied by strain softening. At similar processing conditions, the deformation path provided by multidirectional forging was found to be more favorable for grain refinement and strain softening than that of uniaxial compression.
Methods of controlling mechanical behavior of layered titanium material under impact loading
Authors: Sarkeeva A A , Kruglov A A , Lutfullin R Ya 
Published: January 2021

Abstract
The results of studies on the mechanical behavior of a Ti-6Al-4V laminated material obtained by diffusion welding are analyzed. It is shown that the impact behavior of the layered material depends on many factors including the interface defects, the orientation of the notch tip relative to interface, the number and microstructural state of the layers and their crystallographic texture.
Determination of Standard Oxygen Transfer Rate in Venturi Aeration System
Authors: Yadav Anamika , Kumar Avinash , Sarkar Sudipto 
Published: January 2021

Abstract
The oxygen transfer is the process of atmospheric oxygen diffusion from a gas stage to a liquid stage in the form of dissolved oxygen (DO). The previous research works have successfully proven that the DO concentration level effortlessly rises by adopting a venturi as an aeration method in aquatic bodies. Present experimental study was conducted on laboratory scale aeration tank with two different sizes of venturi (40 and 80 mm throat length). The objective of the current study was to determine the oxygen transfer coefficient at different discharge rates through venturi aeration system. The system was operated with three different discharges of 0.50, 0.58 and 0.67 liter/second (l/s) to circulate 200 liter volume of water, was aimed for circulation in a closed loop system. During the operations, water moves through the inlet section into the contract section of the venturi, which increases the rate of water flow and reduces the pressure as per the Bernoulli’s theorem. In order to study the oxygen transfer coefficient at varying discharge, the system worked by a single hole and accordingly applied to the larger number of holes for both the throat lengths of venturi. It was observed that the oxygen transfer coefficient proportionally linked to the DO diffusion with increasing rate of discharge. The oxygen transfer coefficient found to be increased by 31% and 55% at 40 and 80 mm throat length respectively, with increasing the discharge. The rate of DO diffusion found higher causes more surface area of contact between air and water through maximum air entrainment. Moreover aeration efficiency also increases with the rate of increasing discharge for the maximum size of throat length. The maximum SOTR values was obtained 0.0035, 0.0041, and 0.0050 kgO2/h at varying discharge of 0.50, 0.58 and 0.67 l/s respectively for 40 mm throat length. For the 80 mm throat length, the SOTR values varies from 0.0042, 0.0062 and 0.0091 kgO2/h at increasing discharge of 0.50, 0.58 and 0.67 l/s respectively with increasing number of holes.
Adopting zero accident vision in India: a conceptual framework
Authors: Narain Jai , Meena Makkhan Lal , Dangayach Govind Sharan , Patnaik Amar 
Published: January 2021

Abstract
The research concentrates on the five success factors of Zero Accident Vision (ZAV) methodologies, which are the pillar of ZAV. As safety is the priority of any industry, so, the research aims to contribute a new idea for accident prevention in high-risk industries. The research is based on the survey format in which the rating of workers are taken on important factors regarding accident prevention and awareness, and from the basis of that result, we find the necessary critical factors. From the result, it can be concluded that what are the factors which are necessary for the implementation of ZAV. As earlier there is limited work that has been done in the field of ZAV, so here a framework is proposed for ZAV to prevent the accident that will lead the industries towards zero accident vision.
Sustainable Construction Using EPS Beads in Light Weight Blocks to form Innovative Foam Concrete as a Green Building Material
Authors: Moon A S , Patel Dr. A 
Published: January 2021

Abstract
We assume to build up another sort of basic light weight concrete by supplanting the coarse total with EPS dabs. Extended Polystyrene (EPS) this is light in weight and it has been utilized as in building applications. EPS is in granular structure and it is utilized in light weight cement to make the solid lighter from 950 kg/m³ to 1350kg/m³. In this paper we did test examination on the designing properties, as compressive quality, modulus of flexibility, drying shrinkage and creep, of polystyrene total cement fluctuating in density. Factors, for instance, water/solid extent, polystyrene/solid extent, solid substance, advancement, compaction, fire, resistance. At the completion of the examination, a philosophy for arranging EPS light weight solid mixes is plot.
Role of micro-factors on microstructure and on the tribological performance of HVOF coatings: A review
Authors: Vats Alok , Patnaik Amar , Meena M L , Shringi Dinesh 
Published: January 2021

Abstract
Mechanical components, whether stationary or moving are subjected to wear and corrosion. A combined effect of these two is even more deleterious. Thermal spray technique proves to be an effective solution to address these issues. HVOF coatings owing to their inherent characteristics like high hardness, adhesion, density (porosity <1%) its provide enhanced mechanical and tribological performance and so are widely used across industries. Micro-factors like presence of pores, oxides and cracks, matrix and binder properties, addition of Cr, cohesive strength and boundary regions etc. do influence the coating behaviour, besides the deposition parameters. The objective of this paper is to review the effect of above mentioned factors on the wear and corrosive performance of the coatings for industrial and research viewpoint.
Optimization of Abrasive Wear Behaviour of Cenosphere Filled Basalt-Epoxy Composites Using Taguchi Approach
Authors: sharma Vikas , Meena M L , Chaudhary A K , Kumar Sundeep 
Published: January 2021

Abstract
The current research work investigates the three-body abrasive wear analysis of cenosphere particulate filled chopped basalt fiber (40 wt.% constant) reinforced epoxy composites for developing light weight, low cost, and sustainable composite. The effect of cenosphere particulate on the composite was investigated. The composite laminates are fabricated by traditional open mold casting technique. The cenosphere particulate is mixed (0-15 wt.%, step of 5 wt.%) in the composites. Abrasive wear process input parameters like: filler loading, normal load, sliding distance, and abrasive size are optimize by using Taguchi design of experiments. From the results, it is clearly seen that 10 wt.% cenosphere filled basalt-epoxy composite (EBC 10) shows lowest abrasive wear rate in a steady state abrasive wear condition (with a variation in sliding distance and normal load). Taguchi experimental design technique is an effective optimization technique and gives a better outcome.
Review: Technological Development of Heat Transfer Enhancement in Two Phase Flow by using Passive Method
Authors: Jadhav Gajanan Z. , Gupta K K 
Published: January 2021

Abstract
The Heating, Ventilation, Air conditioning & Refrigeration application always shows an opportunity to enhance the heat transfer rate. With these motives, researchers explored the use of passive methods in single phase flow which exhibits promising results of heat transfer enhancement. On the other hand, researchers investigated the effect of the passive method in Two phase flow, which also shows promising results in heat transfer enhancement. Two phase flow includes Boiling, Evaporation & condensation phenomenon. This paper focused on the review of the experimental studies conducted on the use of heat transfer enhancement in the condensation process mostly. Out of this passive method, Micro fin tube shows better heat transfer enhancement and less pressure drop compared to other methods. It has been observed that the use of porous media also showing promising effects in heat transfer enhancement and it’s fetching the attention of researchers. Therefore, this review work also reviewed the numerical studies on the use of porous media in two phase flow. It is needed to explore the different structure and optimum design of porous media, which have high heat transfer enhancement with low pressure drop penalty. Also, the use of low Global Warming Potential refrigerant effects needs to be explored, which could be a better alternative for existing refrigerants.