bluuebunny/crossref_metadata_2025 huggingface dataset:
Fragmenter le corps, fragmenter les droits
Authors: Sabuco i Cantó Assumpta , Juan Salvador
Published: September 2017

Cet article analyse la fragmentation croissante du corps dans deux domaines : l’esthétique et la maternité. Dans les deux cas, les nouvelles technologies corporelles favorisent des représentations légitimées par le désir individuel et par la forte conviction de leur réalisation. Les procédures de cet enchantement symbolique substituent des corps imaginaires aux corps réels, à partir desquels se centrent et redéfinissent les droits humains. Le nombre croissant d’industries qui opèrent comme par magie introduisent de nouvelles formes de domination. À l’efficacité de ces technologies récentes du genre s’ajoute la transition entre des soins externes et des soins propres allant jusqu’à briser le concept moderne de citoyenneté. Ainsi se redéfinissent des priorités politiques polarisées concernant le corps (droit à la beauté versus droit à la santé, droit du fœtus versus de la mère, droit à la paternité versus maternité de substitution). Les conflits juridiques et les résistances sont décrits comme conséquences directes de ces réductions dans la matérialité corporelle.
Qu’est-ce qu’être psychologue en CAARUD ? Éléments de réflexions théoriques à partir d’une expérience professionnelle au CAARUD de Saint-Denis
Authors: Richaud Emma
Published: September 2017

Les CAARUD sont des centres d’accueil de jour destinés à accueillir une population usagère de drogues. Hérités de la loi du 31 décembre 2005, ils font partie de la mise en place d’une politique de Réduction des Risques concernant l’usage de substances psychoactives. À travers une expérience professionnelle de psychologue clinicienne au CAARUD de Saint-Denis (93), l’auteur propose d’explorer les spécificités des prises en charge du public accueilli, public présentant des conduites ordaliques et mortifères importantes, ainsi que d’exposer quelques-uns des outils méthodologiques et des apports théoriques nécessaires à sa pratique professionnelle.
La neurotoxicité du cannabis : analyse des données de neuro-imagerie structurelle
Authors: Zullino Daniele , Calzada Gerard , Gaspoz Julie , Achab Sophia , Thorens Gabriel
Published: September 2017

Les discussions récentes concernant la réglementation de la consommation de cannabis ont réactualisé la question des effets nocifs de ce produit. Un des arguments avancés contre une réglementation moins restrictive de l’usage du cannabis a régulièrement été son effet potentiellement toxique sur la structure du cerveau. Un nombre important d’études spécifiques de neuro-imagerie a été publié ces deux dernières décennies. Chez des sujets adultes, aucune des études publiées n’a pu trouver de différences entre les utilisateurs de cannabis et les sujets contrôles concernant le volume cérébral total, le volume de la matière grise ou encore le volume de la matière blanche. Concernant les analyses des parties du cortex, des résultats positifs ont régulièrement été contredits par d’autres études. Les mêmes constats que pour les adultes peuvent être faits pour les adolescents : les études disponibles ne montrent aucune différence de volumes totaux, et les différences régionales trouvées dans certaines études sont soit non répliquées, soit contredites par plusieurs autres études. À noter que toutes ces études étaient transversales et mesuraient a posteriori les volumes cérébraux, c’est-à-dire après le début d’une consommation de cannabis. Même si les résultats avaient été en majorité, et de façon consistante, positifs, aucune déduction d’un lien causal n’aurait pu être faite. Au vu des données disponibles, on ne peut donc pas retenir l’hypothèse d’un effet toxique du cannabis qui aurait comme conséquence des changements de volume du cerveau. Aucune mesure préventive ou répressive ne peut ainsi prendre appui sur la thèse d’un tel effet toxique.
Integration of Logistics Simulation Technology and Logistics Learning Factory in a Two-stage Teaching Method for Logistics Management Courses
Authors: Fu Haiwei
Published: September 2017

Traditional classroom teaching techniques for logistics management courses focus solely on imparting theoretical knowledge despite the multidimensionality and diversity of the logistics working environment. Moreover, the application of modern teaching techniques is isolated and lacks systematic coordination. Students thus acquire knowledge but cannot adapt to practical working requirements. Therefore, to develop the autonomous learning ability of students and to improve teaching results of logistics management courses, this study proposes a two-stage teaching method that integrates logistics simulation technology and logistics learning factory. First, students are acquainted with various logistics operation links through logistics simulation technology, thus allowing students to exercise their abilities to autonomously design logistics systems and operate logistics system flow. Second, through the logistics learning factory, students experience the overall process of lean production and improve their learning interests through scenario rendering and visualization. Finally, the degree of the students’ acceptance of this teaching method was surveyed on the basis of the technology acceptance model. Results showed that the students who were taught using the two-stage teaching method have significantly higher scores for perceived usefulness, attitude toward using, and behavioral intention than students who were not taught with the proposed method. The proposed two-stage teaching method compensates for the limitations of the single teaching method for logistics management courses. Nevertheless, its perceived ease of use should be improved.
Gamification Teaching Reform for Higher Vocational Education in China: A case study on Layout and Management of Distribution Center
Authors: Wang Fan , Wang Yanli , Hu Xia
Published: September 2017

Currently, students in higher vocational schools in China are passive in classrooms and depend too much on cellular phones. Thus, structural readjustment of the teaching organization is urgently needed. Increasing proportions of gamifying teaching and experiencing teaching is an effective way to solve this problem. However, only a few studies have discussed the gamification of teaching reform in colleges. To improve the effectiveness of teaching and increase the participation of students in classrooms, the teaching reform idea and scheme of gamifying teaching and experiencing teaching were discussed in a course entitled Layout and Management of Distribution Center. The teaching reform aims to integrate comprehensive gamifying into the teaching of an entire curriculum. Specifically, small games are designed in each class during the early period to help the students learn the corresponding knowledge in games. A game-driven model of curriculum design was proposed and applied in teaching reform practice of Shijiazhuang Posts and Telecommunications Technical College. Results demonstrated that gamification of teaching reform achieves outstanding effects. Students participate in classroom activities positively, and all evaluation indexes improve year by year. Results confirm that teachers need to pay attention to systemization, gamification, and immersion of teaching design, and ensure the attractiveness and acceptability of the teaching method.
An Online Interactive Courseware for the Course of Textile Materials
Authors: Li Zhen
Published: September 2017

In the era of network information, interactive multimedia application technology develops rapidly, and is widely applied in teaching courseware. Online interactive courseware is simple, clear, vivid, visual, convenient, flexible and fast, which also greatly reforms the teaching methods and has become a way of educational informatization. Online interactive courseware has been applied in the course of textile materials. This paper mainly aims to design and construct the method of testing and evaluating the multimedia courseware of Textile Materials based on the multimedia courseware interaction technology in combination with the patented method and device of PPT file playing. By appropriately applying and analyzing the courseware of Textile Materials based on the interaction technology, the results demonstrate that “flip” in class can be basically realized, to realize individualized learning; students’ learning attitude can be changed, and students can form independent learning ability; student-student communications via multiple channels and equal student-teacher interaction can be promoted; comments and reviews can be given on the teaching results, so that the desired teaching objectives can be achieved. These findings indicate that online interactive courseware can improve the teaching effect of textile materials course, and relevant conclusions can provide technical reference for the application of online interactive courseware.
Layered Composite Materials Designed for Higher Corrosion Resistance of Oil Production Equipment
Authors: Bogatov N.A. , Bogatov Aleksandr Aleksandrovich , Salikhyanov Denis Rinatovich
Published: September 2017

The oil industry of Russia currently needs innovative development projects aimed at a radical improvement of the performance of material resources and a decrease of their consumption. One of the most promising trends in corrosion protection is the production and use of pipes made of layered composite materials. There are several principal ways of producing them by metal forming processes. The world practice shows that lining technology is reasonable for oil well tubing. Lining consists in simultaneous expansion of pipes made of dissimilar materials, which possess different properties. A pipe of the kind manages to combine high corrosion resistance and mechanical strength, and this makes its service life more than 4 times as high as that of pipes made by conventional methods. However, previous foreign experience of manufacturing and using these pipes prompts the necessity of improving some pipe-making processes. This paper discusses new engineering solutions in the production of lined pipes, as well as in situ testing results.
Lost Foam Casting with the Use of Recycling and Nanostructured Materials
Authors: Znamenskii L.G. , Ivochkina O.V. , Varlamov A.S.
Published: September 2017

A relevant technology issue in lost foam casting is preventing the metal penetration appearance on steel and cast-iron mouldings. As a result of the research the appropriate parting model paint compositions with the use of recycling and nanostructured materials were developed. The basic technological characteristics of the developed parting model paint compositions are: relative stickiness due to VZ-6 18...25 s; residual moisture content 1...1.5 %, permeability to gases 40...50 ea. The parting paint effectiveness is determined by defect reduction of the castings on the core blow, uncertainty in geometry, metal penetration, and also the use of available and environmentally friendly molding materials in their composition, that makes the product to be highly competitive.
Structure and Properties of Concrete for Injection with Two-Stage Expansion
Authors: Koryanova Y.I.
Published: September 2017

Often, when it is necessary to fill formwork space in confined working conditions with limited operational control in some engineering solutions the special materials for injection are used. In this case, it is advisable to use high-fluidity concrete mixes made with К-cement, regulator of the kinetics of structure formation, superplasticizer and gas-forming admixture. The gas-forming admixture obtains of expansion of fresh-concrete during first stage. The special sulfo-alumina additive in K-cement obtains of expansion of hardening concrete during second stage. The main regularities in the formation of the structure and properties of cement stone are considered. The dependences "composition-technology-structure-properties" for concretes with two-stage expansion are clarified. The main provisions for determination of mix proportion for concrete are proposed. The quantitative relationships between the construction properties of concretes and prescription and technological factors are obtained.
Modern Packaging Materials for Steel Products
Authors: Kolyada L.G. , Tarasyuk E.V. , Krylova S.A.
Published: September 2017

The paper investigates structural, physical, deformation, strength, barrier, and corrosion resistance properties of domestic packaging papers in comparison with Fislage's foreign equivalent. It studies packaging paper protection of cold-rolled steel under different relative humidity, periodic humidity concentration, and available chloride ion conditions. The corrosion resistance properties of BLIK paper with UNI inhibitor are proven to match those of the foreign equivalent previously used. The EuroBum's packaging paper has poorer protective properties possibly due to the lower corrosion inhibitor content. The competitive recovery of domestic combined packaging materials for metal products can be improved by changing their production processes: increasing inhibitor content, creeping ratio of the paper base and reinforcement in order to obtain better deformation and strength properties.
On Effect of Superplasticizers and Mineral Additives on Creep Factor of Hardened Cement Paste and Concrete
Authors: Nesvetaev G.V. , Korchagin I.V. , Lopatina Y.Y.
Published: September 2017

The relationship between the creep factor of concrete and hardened cement paste and the E-modulus of aggregate and evaluation of the effects of some modifiers on the creep factor of the hardened cement paste was determined. The influence of the SP on the creep factor of hardened cement paste is ambiguous: SP may increase, decrease, or not change the creep factor. The possible deviation of creep factor of hardened cement paste with the SP in certain cases can be up to 4 times. The average statistical increase in the creep factor of hardened cement paste may be 7 to 35%. The creep factor of regular concrete is equal 0.43 - 0.9 value of the creep factor of hardened cement paste. Superplasticizers may increase the creep of concrete up to 30% and in some cases - up to 3 times. Silica fume, metakaolin, white ash, including when used with the superplasticizers, may reduce the creep of concrete from 15 to 50%. An equation was suggested to calculate the E-modulus of concrete with the volume of hardened cement paste of 0.27 - 0.35 as a function of E-modulus of hardened cement paste and E-modulus of the aggregates.
Systems Analysis of Process Control Capabilities for Forging Accuracy
Authors: Shibakov V.G. , Pankratov D.L. , Khairullin R.
Published: September 2017

The significance matrix for the parameters of “material-billet-equipment-process-tool-personnel-environment” system was compiled using the systems approach to the assurance of forging dimensional accuracy, and the expert analysis revealed the most significant process parameters that affect the accuracy. The application of simulation modeling helped to establish the dependence of forging force on the dimensions of an incoming billet. The paper suggests a solution to increase the accuracy of the sized forgings.
Increasing of Long Products Rolling Efficiency: Modernization of Stelmor Air Cooling Line to Obtain Sorbitized Wire Rod
Authors: Tulupov O.N. , Moller A.B. , Sarancha S.Y.
Published: September 2017

Most national companies are seeking to reduce costs, improve technological processes and increase profitability. The steel industry is no exception - an example of cost reduction is a technology of sorbitized wire rod production. This technology can improve the performance characteristics of wore rod and reduce the number of patenting stages during metalware production. The developed technology has been tested in the CIS countries Stelmor lines, and its task is to eliminate the significant disadvantages of these lines: the absence of differential cooling on the conveyor width, insufficient cooling rate of air cooling sections, the lack of frequency regulated speed control for electric motors. Eliminating these disadvantages and developing new cooling modes using the software, based on the original mathematical model, allows for the production of sorbitized wire rod with high performance characteristics, provided with increased level of pearlite dispersion (1-2 points for at least 85% of area). Each intense and retarded cooling section has to be fitted with adjustable flaps controlled by electric motors, ensuring the alignment rod temperature at the roller conveyor width. Before the start of the reconstruction of the cooling line a detailed technical and technological audit is required to identify and eliminate the causes that lead to uncontrolled temperature deviations or wire rod laying deviations on the cooling conveyor.
Improving the Rolling Technology at Mill 450 OJSC "MMK" to Reduce the Level of Alloying of 09G2S Steel Designed for Strength Class up to 440 MPa
Authors: Moller A.B. , Kinzin D.I. , Levandovskiy S.A.
Published: September 2017

Nowadays, the technology of shape-rolled steel production defines the quality and strength of common purpose and critical building structures. To provide for all the necessary mechanical characteristics, it is necessary to pay attention to each phase of steel production: melting, casting, reheating, rolling and cooling. Often, due to poor production equipment and lack of appropriate technologies steel alloying is applied. This deteriorates steel weldability and significantly increases the cost of the rolled product. The article reviews the final stage properties formation – water quenching stage after the rolling mill. Now, at mill 450 of OJSC Magnitogorsk Iron and Steel Works (MMK) vanadium is used for microalloying during the production from 09G2S steel, which provides for the specified technical properties of steel. The developed quenching technology provides for a possibility to decrease the level of microalloying. The following mathematical simulation was carried-out: steel section cooling down during quenching; heat treatment of section steel using DEFORM 3D + Heat Treatment software and further physical simulation to define convective heat transfer temperature coefficients, find tendencies to hardening and dynamics analysis which made it possible to develop a three section module located after dividing shears consisting of 176 nozzles (44 nozzle blocks). As for the proposed design of water cooling line, regimes which provides strength classes 345, 390 and 440 MPa are developed for L-steel with sizes from 40x40x4 to 125x125x16 mm, channel steel from 50 to 180 mm web length and strip (of equivalent thickness).
Simulation of Thermal Conditions during Rolling of I-Beams at Modern Rail and Structural Steel Mill
Authors: Nepriakhin S.
Published: September 2017

Based on the application of variational principle of minimum total power and statistical generalization production experience procedure for the calculation of roll pass design and process-dependent parameters of double-T section rolling on universal rail-beam mill was developed.With the procedure developed, a computer simulation of rolling of the I-beam 35B2 was performed. It has been shown that the proposed procedure for calculating the calibrations rolls for the I-beam rolling in universal calibers ensures that the effective strain of the profile elements is distributed evenly.The study was made within the project, part of state job in the field of scientific activity No 11.1369.2014/K dated 18.07.2014 (State registration number: 114122470051).
Future-Oriented Technology of Preparing Suspensions of Metals
Authors: Belyaev A.N. , Degterev B.I. , Flegentov I.V.
Published: September 2017

The subject under study is relevant as the enterprises in different industries are really interested in disperse systems in the form of suspensions. Suspensions are being widely used in many fields. At the same time the problems of improving their quality and increasing the productivity and energy efficiency of machines still exist. In this context, this study aims at getting finely divided suspensions of metals through the erosion of metal plates in the cavitation flow reactor. The construction of the reactor provides for a technically and technologically simple high-capacity process. The leading method of the research is a laboratory experiment and a qualitative and quantitative assessment of the erosion of the metal surface in the region of maximum developed cavitation. The article presents the results of the research into the nature the metal surface damage under cavitation. The sampling materials are copper and fine silver. The experiment shows quite a strong growth of numerous erosions and states that in the beginning in the region of maximum cavitation the net of cavities appears. Then, the cavities fuse and grow in size. Around single caves the areas of plastic deformation with typical metal flows are detected. The minimal sizes of particles, torn away from the surface, are 2-3 mcm. The study is of high practical value for researchers and specialists in nanotechnologies, solid dispersion, sedimentary analysis, flow detection, biomedicine, production of fuel, lubricants, emulsifiers, catalysts, and semiconductors.
Ti-TiN Multilayer Coatings Obtained by ION FLUX Surface Modification
Authors: Shekhtman S.R. , Migranov M.S.
Published: September 2017

We present a production technology for multilayer vacuum plasma coatings with additional ion bombardment, which is implemented with two methods: by using the hollow cathode effect and by using the self-maintained discharge generated by the plasma generator. Based on this technology, a technology of producing multilayer coatings based on TiN was developed.
Wood Heat Treatment in Construction Materials Production
Authors: Galyavetdinov Nour R. , Safin Ruslan R. , Khasanshina R.T.
Published: September 2017

Wood is widely used in a construction both in the form of integral components and as a part of various products or wood filled composites. However, while using wood in the production of building materials, it is necessary to consider a set of factors, as along with the valuable properties (low average density, ease of handling, etc.) it has a number of negative qualities, which complicate production of construction materials of desirable quality. The results of researches of thermal modification of wood raw materials in production of construction materials are provided in the article. It is established that as the result of change of chemical composition of thermo wood treated at temperatures of 453 K - 493 K, the water carrying out function of material decreases, despite considerable reduction of density. Besides in case of increase in the heat treatment value of wetting angle grows by 25%, and equilibrium humidity of wood decreases. Thus, the results of the conducted researches give the chance to obtain the environmentally friendly wood filled construction materials with low water absorption and hygroscopicity that allows assuming a possibility of creation of materials with the raised operational characteristics.
Expansion of Concrete Functionality due to Use of New Hydrophobic Additives
Authors: Tukhareli V.D. , Tukhareli A.V. , Cherednichenko T.F.
Published: September 2017

The lack of free areas in urban infrastructure development in the historically formed housing development in large cities and megacities promotes the growth of volumes of the realizable objects of underground construction. The design, installation, as well as quality control of waterproofing works in this case are crucial and significant stage in the construction of underground and hydraulic structures. A comprehensive approach to the analysis of the situation contributes to the selection of the correct strategy for the work execution and suitable material for waterproofing of building structures. Primary concrete protection requires the development of new effective polymer waterproofing materials. The acrylic polymer addition in concrete composition promotes corrosion resistance by 13%. Due to the composite modification penetration of corrosive medium decreased by 80%. The effectiveness of concrete modification by polymer acrylic additives is evident. This modified concrete is one of the most popular materials in the construction industry. By this criterion technology becomes progressive.
Integrated Method of Study of Hardened of Details
Authors: Mingazhev A.D. , Krioni N.K. , Gafarova V.A.
Published: September 2017

The provision of certain information regarding the surface layer of the equipment parts is one of the critical issues for the modern mechanical engineering. The development of new technologies of protective-strengthening treatment of critical parts surface requires the development of improved methods for surface layer material state assessment as a result of high-energy impact typical for ion-plasmatic, ion-implantation and combined treatment method. Moreover, the peculiarities of industrial mechanical engineering production require the development of simple and efficient methods of surface layer parameters checkout. The application of protective coatings complicates the use of universal method of the parts surface layer parameters assessment. The present article is devoted to the development and studying of a new method for the parts surface layer state assessment after its treatment of various types, including the protective-strengthening technologies and the application of protective coatings. The specific features of the proposed assessment method are its simplicity, reliability, and universality.
Islet Nitriding of Product Surfaces Made from Alloy Steel
Authors: Krioni N.K. , Mingazheva A.A. , Kononova A.Y. , Mingazhev A.D. , Gafarova V.A.
Published: September 2017

One of the most urgent problems of modern machine engineering is to increase the wear resistance of machine parts. The appearance of new technologies of parts strengthening treatment and improvement of the existing ones, especially the technologies based on thermochemical method, remain quite sought-after and are successfully used to improve the operational properties of the parts. Parts surface layer nitriding as the most common method of improving the service life and reliability of the modern machine parts got a new quality due to the use of ion-plasma processes. At the same time, the ever-increasing requirements for performance of machines and devices of different purposes, intensification and tightening of the conditions for their operation requires the creation of new nitriding technologies to provide a range of required properties of parts surface materials. This article is dedicated to the development and research of new nitriding technologies for alloyed steel parts. The aim of the proposed nitriding technology is to provide a composite layer combining high wear resistance and ductility of surface layer material. A feature of the nitriding technology is creating the conditions of processes of thermochemical treatment of parts, making it possible to form the islet nitrided layer.
New Composite Dispersion Reinforcement Materials with Modulated Characteristics
Authors: Moskovsky S.V. , Noskov A.S. , Rudnov V.S.
Published: September 2017

The Institute of Civil Engineering of the "Ural Federal University Named after the first President of Russia B.N. Yeltsin" (UrFU) has carried out the research to improve the deformation-strength characteristics of the most common building material, i.e. concrete. One method to improvement the properties is the disperse reinforcement of the entire volume of concrete with fine fibers. The research and mathematical modeling of the dependence of the characteristics of the composite material on the properties of the dispersed phase (the properties of the fiber material of the fiber) and the dispersion medium (the structure of the concrete) will allow in-situ prediction of the strength of the structures being manufactured and to determine the ratio and quality of the raw feed components of the mixture.
Physical and Technological Features of Formation of Large Thickness Welded Joints in Electron-Beam Welding
Authors: Novokreschenov V.V. , Rodyakina R.V. , Karimbekov M.A.
Published: September 2017

In this paper, based on the gas-kinetic theory of plasma, a theoretical analysis of the possibility of forming a plasma state in melting channel as a result of the interaction of high-energy electrons of the electron beam with the atoms of the material, being processed in melting channel (in free state) is proposed. Also the assessment of a possible impact of this process on the quality of weld metal is given. It is shown that if we take the electron-beam welding of large thickness with formation of a knife-form melting zone, the occurring processes can develop both in the direction of self-organization (synergetic, evolution) and chaotically (it all depends on the set of after-effects, caused by them, and their duration), which is manifested either as autofocusing and melted depth increase (synergy, evolution) or as formation of defects in the center of the channel (in the central part of the weld) in the form of steam and gas cavities of quite considerable size.
Process of Shaped Metal Billets Production from Compositions Based on Iron Powder, Iron Oxide, and Binder
Authors: Dovydenkov V.A. , Zvereva O.S. , Alibekov S.Ya.
Published: September 2017

A new technology of metal billets production by molding and thermal treatment of compositions based on iron powders of medium dispersion, fine powders of iron oxide, and the thermosetting binder, which provides for the required physical and mechanical properties of the material, is proposed. It is found that, at a certain concentration and dispersion of the components of the solid phase, the injection and direct compression molding of parts of complex shape (similar to the MIM-technology) is possible at pressures from 70 MPa to 100 MPa ensuring uniform density over the cross section. The established stages of thermal treatment of compositions, thermal behavior and protective medium ensuring uniformity of products, and chemical composition of the product material are presented in the paper. The experimental and theoretical studies of the dimensional accuracy of steel products obtained by the developed technology were carried out, and it was discovered that the produced parts were of the precision of steel parts produced by MIM-technology.
Research of Wood Thermal Modification Process in Flue Gases Environment
Authors: Safin Ruslan R. , Kaynov P.A. , Beliakova Elena A.
Published: September 2017

Thermal modification is a modern demanded technology allowing receiving natural environmentally friendly material with increased bioproofness and dimensional stability. However, the known technologies of heat treatment of massive wood are rather power-intensive therefore an urgent task is to decrease the energy consumption rate of this process. For this purpose the authors have suggested the technology at which the flue gases, received by gasification of waste of the wood processing industry, act as the agent of processing. The results of the research of this process are presented in the article, the rational modes of processing for concrete types of timber (oak, pine and birch, thickness from 30 to 60 mm) are defined and also the interrelation between the moist characteristics of the wood fuel used for receiving flue gas and the technological modes of processing of massive wood are established. It is also defined that the thickness and breed of material, namely the maintenance of pentosanes as a part of the modified wood exerts impact on the process of thermal decomposition of timber.
Technological Increase of Adhesion Strength between Antifriction Coating and Base in Bimetal Fluid-Film Bearings
Authors: Rodichev A.Yu. , Sytin A.V. , Barabash V.V.
Published: September 2017

To numerically solve a problem of stress-strain state of a workpiece metal under roll forming, finite element analysis was used that allowed using the principle of elastic-plastic deformations with a multilinear hardening curve. Numerical results of base metal lift have been analyzed and the adhesion strength of antifriction coatings and a steel base has been determined. Some recommendations have been made on optimal diameter choice of a workpiece subjected to the skew mesh roll forming
Technology of Mineral Raw Materials Granulation by Electric Arc for Manufacturing of Welding Fused Flux
Authors: Naumov Stanislav V. , Ignatov Michael N. , Sheksheev M.A.
Published: September 2017

The research and description of modern methods and procedure of welding flux manufacture are presented. The technology of welding fused flux production by influencing on the composition of mineral raw materials furnace burden (from 0,5 mic up to 0,20 mm) with electric arc (diameter graphite electrodes 6-18 mm, current from 200 up to 600 A) is proposed to be significantly reducing the labor input as well as dustiness during the operation and transport and improves mechanical properties (granules strength of 16-19 N/mm2) and surface condition of flux granules. The equipment for the granulation does not require large melting furnace and powerful transformers, fuel gas, coke or oil, i.e. welding flux is easy to manufacture.
Use of Low-Grade Vegetable Raw Materials in Production of Composites by Preliminary Processing
Authors: Khasanshin Ruslan R. , Safin Ruslan R. , Galyavetdinov Nour R.
Published: September 2017

Intensive cutting down of trees to replenish the reserves of business wood exhausts wood stocks in traditional logging areas, leads to the decrease in the areas of forest plantings.\, and ecological disruption. Now there are real opportunities to reduce the consumption of traditional forest resources thanks to fuller use of forest products, low-grade wood, and waste of sawmilling and a woodworking for the production of composite materials. In this regard the results of the research on the possibility to use low-grade wood for production of composite materials are given in this work. At the same time a natural filler is subjected to preliminary high-frequency plasma processing. It is established that this type of processing of wood raw materials leads to improvement of its separate properties: wettability of material and adhesion to cement knitting increases. At the same time the increase in wettability of wood samples is directly proportional to the capacity and duration of high-frequency plasma processing. It is proved that preliminary modification of wood filler during production of cement wood results in the increase in its durability during operation in dry conditions.
Physical-Chemical Properties of Molybdenum Films Prepared with Magnetron Sputtering
Authors: Shaburova N.A. , Ratmanov T.D. , Minkin A.M.
Published: September 2017

The methods for evaluating the quality of the protective coating to the size etching of quartz glass with hydrofluoric acid were proposed. Molybdenum coating is generated with the installation NIKA 2012 TN by magnetron sputtering. Quartz glass with a roughness of Ra less than 1 nm was used. Discontinuity of coating was determined by the method of electron microscopy and energy dispersive analysis. Mathematical modeling of the hydrofluoric acid diffusion process performend via the molybdenum film was implemented. X-ray analysis of the coating was carried out to determine the residual internal stresses. We concluded that the studied phenomena affect the quality of the glass surface after etching.
Cold Spray Repairing Corrosively Damaged Areas on Aircraft Constructions
Authors: Shikalov V.S. , Ryashin N.S. , Lapaev A.V.
Published: September 2017

The paper studies the possibility of applying the coatings produced by cold spraying, for the protection and repair of aircraft structural elements of aluminum alloy against corrosion damage during service of aircrafts. Mechanical tests were carried out on samples, made of aircraft alloy 1163RDTV, and repaired by cold spraying after corrosion damage. It is shown that the coating production via cold spraying on corrosively damaged areas can restore the strength characteristics of the sample in the elastic region of deformation diagrams. The preliminary results of the influence of cyclic loading on repaired by cold spraying samples were also obtained. It is shown that the characteristics of durability increased by factor 1.67 in comparisons with the sample that was not repaired after corrosion damage.
Sulfur Composite Materials Based on Sulfide Containing Industrial Waste
Authors: Yusupova A.A. , Akhmetova R.T. , Shafigullin L.N.
Published: September 2017

A technology for the production of sulfur composite materials based on waste from BaCl2 at Karpov Mendeleyevsk Plant (Russia) was developed. The physical chemical and quantum chemical studies were performed for the “sulfur – sulfide containing industrial waste–filler” system. The usage of sulfide ion CaS enables sulfur activation to promote the chemical interaction between the components and synthesis of sulfides and sulfur materials with high physical mechanical properties from them.
Improving the Reliability of Shell Structures Made of Composite Nanomaterials
Authors: Kasharina T.P.
Published: September 2017

The article dwells upon ensuring the reliability of shell structures used in construction under harsh climatic, technological, and geological conditions by using composite nanomaterials. The technical solutions were brought forward, providing engineering protection to urban development, including retaining and fortifying structures, foundations of buildings and facilities, including transport systems, consisting of soil-filled elements. The paper describes the theoretical and experimental study of these solutions. It is based on the application of technical nanomaterials manufactured for a specific purpose and for the reorganization of the necessary functions.
Ion Implantation Modification of Surfaces
Authors: Zlobin V.N. , Kushch L.R. , Kudashev A.S.
Published: September 2017

The article considers the advantages of the ion implantation method compared to the existing methods of vacuum sputtering. It is shown that surface properties can vary considerably and the surface treatment can cause the increase of the sample material surface area. The article also provides the evidence proving that after ion implantation the surface enhances its catalytic activity and changes its mechanic properties. It presents the ion implantation unit used to implement this method along with its operating principle. The authors describe a technological coating process for work surfaces of various intended uses. The article provides the results of application of hardening coatings onto the tool for wood products processing, onto a perishable hard-carbide tool with mechanical mounting, onto a high-speed cutting tool and on face mills with hard-alloy soldering in metalwork, catalytic coatings in car industry and heat and power engineering. The results of the tests performed on the products treated with ion implantation demonstrated that the installation of ion (corpuscular) implantation enables getting catalytic surfaces, enhancing strength, wear-, heat-and corrosion resistance of equipment.
Research of Materials for High Temperature Electromechanical Energy Converter
Authors: Ismagilov F.R. , Vavilov V.E. , Miniyarov A.Kh. , Mednov A.A.
Published: September 2017

The article describes the high temperature winding wires, highly coercive permanent magnets, and electrical steels for high temperature starter-generators.
Simple Universal Kelvin Equation Valid in Critical Point Vicinity and its Application to Carbon Dioxide Capillary Condensation in Mesoporous Silica
Authors: Valeev A.A. , Morozova E.V.
Published: September 2017

A new simple universal form of the Kelvin equation that can be used even near the gas-liquid phase transition critical point is shown. The correction of the chemical potential, pressure, and density outside the porous medium is presented and taken into account for the CO2 meniscus curvature radius calculation at capillary condensation in mesoporous silica MCM-41, known [1] for its wide range of applications.
Study and Analysis of Aluminate Dry Construction Mixtures Properties
Authors: Belyakov V.A. , Bannikova L.A.
Published: September 2017

The article presents the results of studies of a series of dry construction mixtures, being the most popular on the local market for repair of concrete and reinforced concrete structures, in order to improve their performance by modifying composition of their components. The studies included X-ray phase analysis and the research of technological and operational properties of the mixtures. The work proved a possibility to replace the imported aluminous cement in dry repair mixtures with a Russian equivalent bringing along a simultaneous product cost reduction. The studies selected a required aluminous cement-to-Portland cement proportion in repair mortar to ensure optimal setting time and strength characteristics consistent with the initial recipes in case of replacement.
The Production and Subsequent Selective Laser Melting of AlSi12 Powder
Authors: Lykov P.A. , Shults A.O. , Bromer K.A.
Published: September 2017

The paper studies the atomization of Al-based alloy AlSi12 in gas jet. Air was used as a spraying gas. The size and shape of powder particles were studied by using scanning electron microscopy and optical granulomorphometer. The obtained powder was used in selective laser melting.
Influence of Al-Cu-Mn-Fe-Ti Alloy Composition and Production Parameters of Extruded Semi-Finished Products on their Structure and Mechanical Properties
Authors: Reznik P.L. , Lobanov Mikhail
Published: September 2017

Studies have been conducted as to the effect of Cu, Mn, Fe concentration changes in Al-Cu-Mn-Fe-Ti alloy, the conditions of thermal and deformational treatment of ingots and extruded rods 40 mm in diameter on the microstructure, phase composition and mechanical properties. It has been determined that changing Al-6.3Cu-0.3Mn-0.17Fe-0.15Ti alloy to Al-6.5Cu-0.7Mn-0.11Fe-0.15Ti causes an increase in the strength characteristics of extruded rods at the room temperature both after molding and in tempered and aged conditions, irrespective of the conditions of thermal treatment of the initial ingot (low-temperature annealing 420 °С for 2 h, or high-temperature annealing at 530 °С for 12 h). Increasing the extruding temperature from 330 to 480 °С, along with increasing Cu, Mn and decreasing Fe in the alloy Al-Cu-Mn-Ti, is accompanied by the increased level of ultimate strength in a quenched condition by 25% to 410 MPa, irrespective of the annealing conditions of the original ingot. An opportunity to apply the Al-6.3Cu-0.3Mn-0.17Fe-0.15Ti alloy with low-temperature annealing at 420 °С for 2 h and the molding temperature of 330 °С has been found to produce rods where, in the condition of full thermal treatment (tempering at 535 °С + aging at 200 °С for 8 hours), a structure is formed that ensures satisfactory characteristics of high temperature strength by resisting to fracture for more than 100 hours at 300 °С and 70 MPa.
Synthesis of EP648-TiC Metal Matrix Composite Powder for Selective Laser Melting by Ball Milling
Authors: Lykov P.A. , Zherebtsov D.A. , Nerush S.V.
Published: September 2017

The development of additive manufacturing (SLS/SLM, EBM, DMD) suggests the increase of the range expansion of materials used. One of the most promising directions is products manufacturing from composite materials. The technology of composite micro-powders production on the basis of heat-resistant nickel alloy EP648 and TiC is proposed. The aim of this research is to develop a method of producing composite micropowders for additive technology application. This method is based on modification of the metal micropowders surface by the second phase in a planetary mixer (mechanochemical synthesis).The obtained composite micropowders are compared with powders which are recommended for selective laser melting usage (produced by MTT Technology). The equipment used in the research: planetary mixer, scanning electron microscopy (SEM), optical granulomorphometer Occio 500nano.
Electro Physical Hardening of Non Metallic Composite Materials in Additive Technology
Authors: Zlobina I.V. , Bekrenev N.V. , Muldasheva G.K.
Published: September 2017

The analysis of the prospects for the use of additive technologies in the production of aerospace equipment has been performed. It is shown that one of the main problems of implementation of these technologies in the main production is the lack of strength and endurance of 3D printing objects. The influence of electro physical effects of varying intensity on the strength properties of the objects from powder materials, formed by 3D printing has been researched. It is found that the electromagnetic field of medium intensity of the investigated range causes an increase in the flexural strength of the plates made of powder Zp130 impregnated with cyanoacrylate Z-Bond TM90, not less than 38%. Thus, a 24% decrease in pore size and reduction in their dispersion by almost 30% is noticed. It is shown that the composite material structure becomes denser with a large number of connections between the agglomerates. The increase in the number of connections, and the increased uniformity of the structure after the electrophysical influence is one of the mechanisms to improve the strength of 3D printed objects exposed to electro-physical influence.
Heating and Cooling Impact on Mechanical Properties of RIP Electric Insulator for High Voltage Inputs
Authors: Demidov A.N. , Karimbekov M.A. , Marchenkov A.Yu.
Published: September 2017

The mechanical properties investigation results obtained by tension and indentation tests of RIP (resin impregnated paper) electric insulator are presented. Tension and indentation tests of the RIP electric insulation material in wide temperature range are conducted. The common relations between strength and temperature as well as between hardness and temperature for the RIP electric insulation are established. The ratio of ultimate tensile strength to Brinell hardness is performed to be constant (about 1/3) irrespective of temperature, that means a possibility of the RIP electric insulation mechanical properties evaluation by the instrumented indentation test.
Sorption Properties of Nanostructured Calcium Aluminosilicate with Respect to Cesium Ions
Authors: Gordienko P.S. , Yarusova S.B. , Shabalin I.A. , Dostovalov V.A.
Published: September 2017

Long–lived 134Cs and 137Cs isotopes with half-cycle of 2.06 and 30 years respectively refer to the most dangerous and wide-spread radionuclides in ecological facilities. The efficient way of removing cesium radioisotopes from the living environment is to bind them into the compounds insoluble in water. This paper presents the findings on the sorption properties of synthetic nanostructured calcium aluminosilicates (CAS) with AI:Si correlation equal to 2:2, 2:6, 2:10 and obtained in CaCI2—AICI3—КОН--SiO2—H2O multiple-component system. An isotherm investigation of cesium ion sorption produced from aqueous solution with Cs+1 from 0.2 till 6.0 mmol/L-1 concentration was carried out. Maximum sorption capacity of calcium aluminosilicates (CAS) as well as Langmuir constant was defined. The kinetics data was received and the activation energy of cation exchange in the process of sorption was estimated. The impact of 1% КCI + 6% NaCI saline background on the values of interfacial distribution coefficient (Kd) and recovery rate of cesium ions were determined.