bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rheological Properties and Microstructure of AlSi10Mg Aluminum Alloy produced by Selective Laser Melting
Authors: Salikhyanov D R , Gladkovskii S V , Avraamov Yu A , Volkov V P , Veselova V E 
Published: January 2020

Abstract
The present study is focused on rheological properties of AlSi10Mg aluminium alloy produced by selective laser melting (SLM) at temperatures of hot deformation with the aim to investigate the dependence of strain resistance on temperature, strain rate and strain degree. As-build cylindrical specimens made of AlSi10Mg aluminium alloy was examined on a cam plastometer in temperature range 20 – 500 °C, at strain rate ξ equal to 1, 10 s-1 up to strain degree e equal to 1.2. The paper presents results of study of initial microstructure, microhardness measurement and flow curves of AlSi10Mg alloy produced by SLM. The flow curves of AlSi10Mg alloy produced by SLM can be used in the computer simulation and development of new manufacturing methods of the metallic parts by additive technologies with the use of deformation post-treatment.
The dynamical condition of the vibration machine: nodes of oscillations, flexural centers, connectivity parameters
Authors: Eliseev S V , Kargapoltsev S K , Kuznetsov N K , Bolshakov R S 
Published: January 2020

Abstract
Methodological foundations of structural mathematical modeling are being developed in the application to the problems of forming dynamic states of the working members of technological vibration machines. The purpose of the study is to develop a method of constructing mathematical models to assess the dynamic states of the working members of vibration machines under the conditions of changing the location of application of disturbing influences. Structural mathematical models are used in the form of structural diagrams of the dynamically equivalent automatic control systems. The article shows the possibilities of estimating and forming dynamic states or the distribution of oscillation amplitudes of the working members based on the use of the transfer functions of the system, in particular, the transfer functions of interpartial constraints. A number of concepts have been introduced that reflect the peculiarities of possible relations between the movement parameters of the points of the working member and the parameters of the ratio of exciting force factors. It is shown that the position of oscillation nodes and other characteristic features of dynamic states can be corrected and formed by changing the values of the coefficients of connectivity of movements between the coordinates of points, as well as between the parameters of jointly acting vibration excitations. Analytical relations have been obtained that determine the conditions for the emergence and implementation of various dynamic modes associated with the consideration of vibration nodes and flexural centers.
Automation of selection of technological bases as a basis for formalization of technological design
Authors: Glinskaya N Y 
Published: January 2020

Abstract
The article is devoted to solving the automated selection of technological base. There is an attempt to present the mathematical solving the problem as a problem of depriving the item of six degrees of freedom and defining the surfaces set, which can be processed at one installation. The rules of base selection from the point of view of engineering technology are propounded to introduce as limitations at the later stages of solving the problem. The article makes a conclusion about the possibility of the further complication of the algorithm and raising the quality of solving the problem.
Technology of reconditioning with hardening of working elements of construction and road machines by composite coatings
Authors: Kolomeichenko A V , Titov N V , Baranov Y N 
Published: January 2020

AbstractThe article gives the description of the developed technology of increasing wear resistance of working elements of national and foreign constructional and road machines by composite coatings, obtained on working elements cutting surfaces applying Carbo Vibro Arc Hardening method (CVAH). The technology includes the following basic operations: cleaning and fault detection of the working element, removal of the worn cutting element, compensating element production, its sharpening and welding, preparation of metal and ceramic paste for Carbo Vibro Arc Hardening method (CVAH) and its application, Carbo Vibro Arc Hardening method (CVAH) of the harden cutting surface of the working element. When hardening new working elements technological process operations connected with production and welding the compensating element is not performed. According to the carried out results the rational composition and component concentration of the paste that provides significant increase of working elements wear resistance.
Integration of descriptions of conceptual model representations at automation of design tasks
Authors: Novoselova O V , Sidorov A S 
Published: January 2020

Abstract
This paper investigates integrating model representation descriptions in the form of charts and specifications at the stage of automated systems conceptual modeling, developed in order to solve design tasks on the methodology for automating intellectual labor (MAIL). In the process of creating the applied automated system on the basis of MAIL there were developed the following model representations of design tasks: initial, conceptual, infological and datalogical. The description of conceptual model representation includes the following forms (specifications) and charts: for a static component - F1 and F2, the chart of conceptual structure; for a dynamic component - F3 and F4, the chart depicting a system of subject dependences; F6 and the matrix chart showing the model as a whole including static and dynamic components coordination. There was investigated the process creating charts and specifications as a basis of the method and technique to integrate descriptions of dynamic and static components for the problems solving carried out at designing mechanical engineering objects. Integration of models is performed separately for each component of model on each type of description. Integrating descriptions in the form of charts and specifications for dynamic components of conceptual model representations is given in this paper.
Modeling and study of the stress-strain state of the modular turning tools using numerical finite element method
Authors: Lukina S V , Krutyakova M V , Ivannikov S N 
Published: January 2020

Abstract
The paper studies a comparative evaluation method for the modular cutting tools stress-strain state under the cutting forces loading with the help of the finite element numerical method. The method allows forecasting the modular cutting tool the position of the tip of the cutting edge with identification of the confidence bounds for its exploitation in compliance with its intended use and reference operating conditions. The conducted modeling describes the modular cutting tool structure as a ranked set of structural components, such as the frame, cutting insert, shim, etc., oriented towards a certain direction with some surfaces being contiguous and thus making contact interactions. The research examined different tool structural component layout options, including those equipped/not equipped with a shim, having a radial/tangential location type of cutting components. Regression models were obtained for calculating the total displacements of tips the cutting edges of the cutting inserts, as well as maximum equivalent stresses in the cutting inserts, depending on the attachment and cutting forces for various clamping patterns and positioning cutting plates in the form of linear polynomials. The authors developed recommendations for the most efficient application of the modular cutting tool structural component layout options under specific production conditions.
Automation of operation procedure of a wheeled mobile machine
Authors: Baranov A S , Pavlyuk A S , Poddubny V I 
Published: January 2020

Abstract
The article discusses the theoretical foundations of automation of operation procedure of a wheeled mobile machine. The basis of equations system describing the performance “lane change” maneuver is a combination of the main types of maneuvers: correction of sidewise displacement and angularity deviation, as well as trajectory curvature. The equations system describes the entire process of executing “lane change” maneuver, taking into account peculiarities of entering and recovering from the maneuver. On the basis of the proposed equations system, the recommended form of the control action is presented when performing the “lane change” maneuver. The proposed algorithm for the control activity implementation was tested in the process of field-control tests’ performance of the К- 701wheel-tyre tractor with the hinged frame. The results of field-control tests show that the proposed control model can be used when carrying out certain types of field-control tests that do not require the significant precision of performance.
The study of the profile passability all-terrain vehicles with a wheel formula 6x6 full mass 0.3, 0.75, 2 tons
Authors: Papunin A V , Belyakov V V , Makarov V S 
Published: January 2020

Abstract
The article deals with the issue of overcoming destructible profile obstacles in all-terrain vehicles with a wheel formula of 6x6 with full masses of 0.3, 0.75, 2 tons. It is shown that the most difficult case is overcoming destructible moats. Dependencies are given for calculating the critical value of a pit to be overcome. The calculation method is given. The objects of study are shown - ATVs developed at NSTU named after R.E.Alekseev. The calculations for the four types of soils.
Pulsed micro-melting method for single-cristal turbine blade reduction technology
Authors: Tsareva I N , Berdnik O B , Kirikov S V , Maximov M V 
Published: January 2020

Abstract
The paper is devoted to the study of the composition, microstructure and mechanical properties of heat-resistant single crystalline intermetallic alloy. In order to develop a resource-saving technology, the method of pulsed micro- surfacing has been tested, designed to restore the geometric dimensions of cooled gas turbine blades.
Investigating the process of rock destruction by an indenter in a well through the theory of contact problems
Authors: Korneyev V A , Korneyev P A , Koynov R S 
Published: January 2020

Abstract
The article describes the results of the study of the process of destruction of rocks by contact. The indentation of the indenter into the well wall was considered. A body with a cylindrical surface was used as an indenter. The authors of the article applied the theory of contact interaction of G. Hertz. The strength theory was used as a criterion for destruction. K. Mohr. The dependence obtained by the authors was tested using mathematical modeling. The results of mathematical modeling have confirmed the possibility of practical application of the resulting relationship.
Active vibration isolation of nanotechnology equipment
Authors: Mikhailov V P , Bazinenkov A M , Kazakov A V 
Published: January 2020

Abstract
The paper is concerned with the results of experimental studies of the parameters of transients during the operation of a high-precision drive based on a magnetorheological (MR) elastomer with a closed control system, which is also an active damper. In this paper, the authors showed the amplitude and frequency characteristics of the damper and vibration-isolating platform in semi-active mode and presented a model of outgassing from the near-surface layer of MR elastomer. The results of studies on the partial composition of gases released from the MR elastomer at the temperature 150°C are given, depending on the pumping time.
Technological audit in the system of tools for assessing the innovative potential of technology transfer
Authors: Savon I , Ukraintsev V , Kanaki V 
Published: January 2020

Abstract
The article deals with issues related to technology transfer. It is substantiated that in order to ensure the sustainable development of the Russian economy, it is necessary to organize the process of technological transfer between the subjects of innovation activity. It was revealed that technological audit is a demanded procedure that allows to give an objective assessment of the level of technological development of an economic entity, identify problems and reserves to increase technological potential.
An approach of developing solution for monitoring the status and parameters of technological equipment for the implementation of Industry 4.0
Authors: Nikishechkin P A , Chervonnova N Yu , Nikich A N 
Published: January 2020

Abstract
The article is devoted to the study of trends in the construction of «smart» industries and the theoretical aspects of developing a system for the implementation of continuous control and monitoring of technological processes in industrial enterprises. The requirements for the developed system, its functionality and basic principles of construction are formulated. The main data blocks that need to be obtained and timely monitored during the technological process, as well as methods for obtaining them, are systematized.
Plasma-electrolytic treatment of magnesium alloy fibers
Authors: Krit B L , Morozova N V , Serov M M , Wu Ruizhi 
Published: January 2020

Abstract
The results of researches of the modifying effect of the Pendant Drop Melt Extraction (PDME) and the Plasma-Electrolytic Treatment (PET) methods for ML10 magnesium alloy are presented. Particularities of PET for fibrous magnesium alloy are studied. Metallography, morphology analysis and corrosion tests are executed. The conclusion that application of the PET and PDME methods for purposeful modifying is capable to significantly expand possibilities of magnesium alloys using was made.
Comparison of corrosion resistance of gas-dynamic coatings, obtained using standard and electroerosive powder material
Authors: Ageev E V , Novikov E P , Novikov A N 
Published: January 2020

Abstract
The paper presents the results of a study and comparison of the corrosion resistance of gas-dynamic coatings, obtained using standard powder material grade A-20-11, and aluminum-containing powder material, obtained by the method of electroerosive dispersion of electrical aluminum wastes in distilled water. The study of the corrosion resistance of gas-dynamic coatings was carried out according to the method of accelerated testing using a multichannel potentiostat-galvanostat "Elins P-20X8". 3,5% NaCl was used as working solution. The ESr-10101 electrode (Ag/AgCl/KCl) was used as a reference electrode, the KCl concentration in the potential-forming half-cell was 4,2mol/dm3. The reference electrode was connected to the working solution via an electrolytic switch (bridge). The area of the investigated surface was 1 cm2. The volume of working solution used for each sample was 1 l. The measurement time was 5 hours. As a result of the corrosion resistance study of gas-dynamic coatings, it was experimentally established that in coatings, obtained using standard powder materials, the electrolyte penetrates into the coating, which contributes to the rapid exfoliation. It was also established that the corrosion resistance of the coating obtained using electroerosive powder materials is 22% higher than the corrosion resistance of the coating obtained using standard powder materials.
Peculiarities of structure and properties of titanium during fragmentation and reversal in a torsion process under high pressure
Authors: Shurygina N A , Glezer A M , Dyakonov D L , Medvedyeva A D , Tomchuk A A 
Published: January 2020

Abstract
Influence of a reverse rotation of the moving striker of a Bridgeman chamber (torsion under high quasi-hydrostatic pressure at room temperature) on the structure and mechanical properties of technically pure titanium (VT 1-0) was studied. It was established that a change in the rotation direction of the moving striker during torsion had a significant effect on the conditions for separating the ω-phase, as well as on the structural characteristics of deformation fragments and dynamically recrystallized grains formed during large plastic deformations. Influence of the deformation method on the internal distortions of structure and on the mechanical properties was analyzed.
Comparison of diagnostic tools for cutting tools for the utilization of aerospace composite materials
Authors: Li Xueyan , Galinovsky A L , Sudnik L V 
Published: January 2020

Abstract
The article discusses the comparison of diagnostics of the cutting tool for utilization of composites of aerospace engineering. The paper presents the results of classical, traditional diagnostic methods and ultra-jet method. The article concludes with the advantages of ultra-jet diagnostics.
The expert system for improving the technological processes of composite manufacturing
Authors: Zalazinsky A G , Shveykin V P , Titov V G 
Published: January 2020

Abstract
An expert system for improving the technological processes of composite manufacturing is presented. The domain of the expert system is the technology of pressure treatment of structurally inhomogeneous materials, including powder materials and composites. The purpose of the expert system is the interpretation of experimental data and the prediction of physical and mechanical properties of blanks and products. The function of the expert system is to issue recommendations for improving the technological processes of manufacturing blanks of non-compact metal raw materials, produced on the basis of predicting the properties and behavior of the object of the study. The problems solved by the expert system are planning natural and computational experiments, statistical processing of experimental data, regression analysis, checking the adequacy of mathematical models, multiparameter optimization of the systems and processes under study.
Site-specific ground response analysis at a site in the affected area of the 2016 Pidie Jaya earthquake
Authors: Yunita H , Al Huda N , Saidi T , Yuliannur A , Setiawan B , Ramadhansyah P J , Ali M I 
Published: January 2020

Abstract
Analytical models have demonstrated that they are able to simulate reasonably well the seismic motions at the ground level. The most widely used model is the equivalent linear approach. This equivalent linear model was used to compute the free-field response of Meureudu-Pidie Jaya, Aceh Indonesia’s soft soils during the 2016 Pidie Jaya earthquake. The model computes the ground response of horizontally layered soil deposits subjected to transient and vertically propagating shear waves through the one-dimensional soil column. Each soil layer is assumed to be homogeneous, visco-elastic and infinite in the horizontal extent. The equivalent linear estimation of soil properties is taken to express the nonlinearity of the soil’s shear modulus and damping values. These values are assumed to be a function of shear strain amplitude and determined by an iterative process that must be consistent with the level of the effective strain induced in each sub-layer. Starting with the highest shear modulus and a low damping value, the shear modulus and the damping ratio of each sub-layer are modified. The modification is based on the applicable relationship between both properties and the shear strain. The calculation is repeated until strain-compatible modulus and damping values converge within a tolerance of 1%. This research reveals the ground motions of Pidie Jaya’s soils. The results of the analysis are presented.
Selection of Contractor by Using Analytical Hierarchy Process (AHP)
Authors: Razi P Z , Ramli N I , Ali M I , Ramadhansyah P J 
Published: January 2020

Abstract
Construction projects is progressing rapidly in Malaysia and have been as one of an important factor in contributing the boost of country’s economic. Well known as a sectors with involvement of multiple players, thus, contractor selection is an important aspect in construction sector especially for client or parties involve that need to hire the best contractor to manage and complete their project within time-line and bearable cost couple with comprised quality. Furthermore, without a suitable method use in selection of contractor, it will affect the completion of whole project. This paper aiming in make use of the analytical hierarchy process (AHP) as a decision support model to select contractor. The AHP allows constructing decision as hierarchies and each criterion can be evaluated through weighted determined by the expert in construction field. The objectives of this study is to develop the main criteria used by client in selection of contractors also identify the weighted criteria by using AHP method from current practice in Malaysia. Besides, this method is one of the decision-making that is necessary to eliminate the risks of project failure due to poor contractor’s performance.
Selection of Method in Construction Industry by using Analytical Hierarchy Process (AHP)
Authors: Razi P Z , Ramli N I , Ali M I , Ramadhansyah P J 
Published: January 2020

Abstract
Method in construction industry is very important in construction industry. The type of method used in construction may affect the quality of the project. Three distinct method that will be explore in this paper are traditional method, design and build and industrial building system (IBS). The traditional procurement method, known for its separate entity by the client, architect and contractor. The architect will responsible for design work, while contractor will responsible for construction work. Meanwhile, the design and build, whereby the contractor accepts responsibility for some or all of the design finally the IBS is when the construction built using pre-fabricated components. This paper aiming in identifying the criteria and suitability for selecting different kind of construction delivery method in construction by using the multi-criteria decision making (MCDM) namely the Analytical Hierarchy Process (AHP) method. Results provides some empirical finding which contractor for Grade 7 is suitable employing the industrial building system(IBS) method while the traditional method is appropriately for the Grade 1 contractor.
Selection of Best Consultant by using Analytical Hierarchy Process (AHP)
Authors: Razi P Z , Ramli N I , Ali M I , Ramadhansyah P J 
Published: January 2020

Abstract
Consultant selection is a complex problem involving qualitative and quantitative multi criteria decision. In this study, an AHP-based consultant selection model is applied to develop and assist in decision making process to resolve the consultant selection problem in choosing the most favourable consultant’s criteria combination. The Analytic Hierarchy Process (AHP) is an established decision method used to synthesize judgements and select the best alternative. When the objectives and scopes of study are set, then the data collection are made through two methods which are through literature review and pair-wise questionnaire survey. Information obtained from the questionnaire is interpreted into a simpler form and analysed by using the Expert Choice software. Results shows that financial capability of the consultant prioritize the decision of the selection while dominating the sub-criteria for selection is the profit made by the consultant within the last 3 years.