bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cyclic ring fiber textures in single tungsten fiber-reinforced tungsten composites
Authors: Ciucani U M , Haus L , Gietl H , Riesch J , Pantleon W 
Published: April 2021

Abstract
Tungsten fiber-reinforced tungsten composites are considered as plasma-facing material in future fusion reactors. Such composites are obtained by chemical vapor deposition of tungsten on potassium-doped, drawn tungsten wires. In model composites containing single fibers, particular texture types develop due to the cylindrical geometry of the deposition process. The vapor-deposited tungsten layers form a cyclic <100> ring fiber texture with one of the <100> directions pointing radially along the growth direction. The procedure for revealing this non-standard texture type from orientation data obtained by electron backscatter diffraction is presented. Identification of cyclic textures requires carefully chosen acquisition regions as well as a suitable coordinate system for their analysis. It is demonstrated that quite erroneous conclusions about the texture of the layer would be drawn if this is not accounted for properly.
Twin induced Strain Hardening, Grain Fragmentation, and Texture Evolution during Cold Compression of CP-Ti
Authors: Chouhan Devesh Kumar , Biswas Somjeet 
Published: April 2021

Abstract
This work is a systematic investigation of the twin induced strain hardening behavior, grain fragmentation, and texture evolution during titanium’s cold compression. The compression tests were stopped at intermediate strains for quantitative microscopy by electron backscattered diffraction. The microstructural examination indicates the evolution of {1012} extension twins (ET), {1122} contraction twins (CT) and the interaction between them. The strain hardening rate and its derivative plot could be corroborated with the microstructural features and distinguishes regions of slip and twin dominating zones. The texture evolution indicates that dislocation slips were active apart from deformation twins during deformation. Texturally hard ET evolves, broadens, and interacts in texturally soft grains at low and intermediate strains. The ET regions are suitable for the nucleation of texturally soft CT with further strain. During deformation, ET-ET ∼56.8〈1010〉, CT-CT ∼77〈1010〉, ET-CT ∼87〈4221〉 interactions boundaries and CT-ET ∼44.5〈5140〉 double twins develop.
The role of deformation twins in recrystallization texture formation of the FeGa alloy
Authors: Milyutin V A , Gervasyeva I V 
Published: April 2021

Abstract
It has been found that at cold axial deformation of the (Fe83.4Ga16.6)99.9(NbC)0.1 alloy by hydrostatic extrusion, along with the slip processes, deformation twins are formed. The orientations of these formations in the plane perpendicular to the deformation direction coincide with the crystallographic planes {100} or {110}. It is believed that in bcc alloys, the axial deformation texture <110> is stable and undergoes only a small scattering upon recrystallization. Using the EBSD technique in this work, we have shown that the desired <100> / / DD grains can grow into a deformed <110> / / DD matrix upon primary recrystallization. At the same time, recrystallization of as-deformed samples leads to almost complete destruction of the original texture. The <100> orientation probably develops in connection with the presence of nuclei in the form of the least deformed twins, which are not observed in ordinary iron alloys. This feature of Fe-Ga alloys gives principal possibility of creating necessary cube texture and achieve a high magnetostriction value.
Heterogeneity of microstructure, texture and mechanical properties along the building direction of Ti-6Al-4V alloy developed by SLM
Authors: Widomski C , Solas D , Baudin T , Brisset F , Lebel S , Helbert A-L 
Published: April 2021

Abstract
Selective Laser Melting (SLM) is of great interest to the aerospace industry due to its ability for producing components with complex geometries. The laser melting process induces a high cooling rate (105-107 K/s) and a germination by epitaxy which leads to a columnar microstructure. In the case of Ti-6Al-4V the rate of cooling from the β domain generates a martensitic α’ structure made up of fine needles. The present work describes the microstructural, textural and mechanical heterogeneities along the building direction of Ti-6Al-4V samples produced by SLM with two strategies that have different melt pool size. Characterizations show that both strategies lead to a martensitic microstructure but only the SLM with the greater melting area allows to get homogeneous hardness, texture and β grain size (reconstructed by ARPGE) along building direction.
Effect of post-rolling cooling on the hot-rolled microstructure and texture of a new medium-carbon steel
Authors: Javaheri V , Sadeghpour S , Kaijalainen A , Kamali M R , Kömi J 
Published: April 2021

Abstract
Thermomechanical processing consisted of hot-rolling in the austenitic region with deformation both above and below the non-recrystallization temperature. Immediately after rolling, specimens were directly quenched in water to three different temperatures of 560 °C, 420 °C and room temperature. The first two samples, which were quenched to 560° C and 420°C, immediately cooled slowly in the furnace. The microstructure of samples quenched to 560 °C mostly comprised of upper bainite whereas the samples quenched to 420 °C mainly consisted of lath-type bainite. The microstructure of sample direct-quenched to room temperature was mainly martensite. The transformation texture of all samples at the midthickness position showed the same general texture, consisted of mainly ᵅ and ᵞ fibers components with high intensities close to the transformed copper {112}<110>ᵅ, transformed brass {111}<112>ᵅ and rotated cube {001}<110>ᵅ components. However, the direct-quenched sample produced slightly more intense texture compared to the bainitic samples. The local texture of samples near the rolled surface owing to sever deformation showed the shear features consisting of major components of {112}<111>ᵅ, {110}<112>ᵅ and {110}<111>ᵅ.
Secondary Recrystallization of Grains with Cube Orientation for Pure Iron Tape
Authors: Okai D , Yamamoto A , Doi T , Adachi H 
Published: April 2021

Abstract
The formation mechanism of secondary recrystallized grains with cube orientation has been investigated for a pure iron tape prepared by a three-stage cold-rolling method. The crystal orientation before the final cold-rolling affected the appearance of secondary recrystallized grains with cube orientation. The {0 ī 2}<1 0 0> orientation before the final cold-rolling led to the formation of secondary recrystallized grains with cube orientation on the tape surface.
Evolution of recrystallization texture for Cu-30% Zn alloy sheets with high Young’s modulus in the transverse direction
Authors: Inoue Hirofumi , Ituchi Fumito , Cho Tetsuo 
Published: April 2021

Abstract
Miniaturization of electric connecters with higher stability in the coupling force is demanded as components of electric vehicles. Copper alloys are attractive materials from the perspective of electric conductivity. It is considered that Brass orientations {110}<112> has high Young’s modulus along the transverse direction (TD) since the Young’s moduli of copper single crystals show a maximum value at the <111> direction. The authors could successfully develop the near-Brass orientation in TD of the annealed sheets by performing additional warm rolling at a low reduction in thickness for cold rolled Cu-30% Zn alloy (brass) sheets with material cost lower than pure copper. The near-Brass recrystallization texture with a main component {110}<223> showed maximum orientation density after annealing at 723 K when warm rolling was performed at 623 K. In addition, we discussed the mechanism of the recrystallization texture evolution for Cu-30% Zn alloy sheets, which were subjected to the combined rolling consisting of cold and warm rolling using a conventional rolling mill and subsequently annealed at 723 K, in view of annealing twinning in the early stage of recrystallization.
Regularities of Crystallographic Texture Formation in Products Obtained by Selective Laser Powder Melting
Authors: Isaenkova Margarita , Perlovich Yuriy , Rubanov Anatoliy , Fesenko Vladimir , Yudin Artyom 
Published: April 2021

Abstract
As examples of austenitic steel 316L, nickel alloy (Inconel 625) and titanium alloy VT1-0, the regularities of the development of crystallographic texture in monolithic samples and lattice structures obtained by selective laser melting (SLM) of powder are considered. Crystallization of all of these alloys is carried out by the formation of crystals with a cubic structure {100} <001> (bcc or fcc). Upon subsequent cooling, the titanium samples additionally undergo a β→α phase transformation while maintaining the Burgers orientation relation. A sharp cubic texture {100}<001> is formed in the middle-height layers of a monolithic product, which determines the anisotropy of the properties of SLM samples. The layer-by-layer change in the crystallographic texture is associated with the growth of columnar crystals of the cubic phase, which are formed due to the thermal effect of the molten region on the underlying layers, which determine the orientation of the crystal during its crystallization. This texture is typical for both the fcc-phase of steel and the bcc-titanium phase. In the case of the formation of lattice structures, columnar crystals with a preferred orientation of <001> along the growth direction are formed in the central part of the ribs and nodes along the diameter of the structural elements. On the basis of the crystallographic texture of the steel lattice structures and the mechanical properties of the monolithic specimens, the strain curves of the lattices under their compression were calculated.
Microstructural anisotropy in Electron Beam Melted 316L stainless steels
Authors: Kumar Deepak , Shankar Gyan , Suwas Satyam 
Published: April 2021

Abstract
In recent years electron beam melting has been explored to establish its suitability for product manufacturing as this additive manufacturing route offers advantages which are not achieved in other similar processes. This paper focusses on the prime issues associated with 316L manufactured using electron beam melting. Location dependent microstructure and strain accumulation is found to be completely different at central and peripheral regions in a particular layer. Coarser grains as well as lesser amount of strain value is observed at central region when compared to periphery. Crystallographic texture at centre is seen as intensified <100> parallel to build direction whereas it is weak and relatively scattered (<100> and <110> both) for periphery. BD parallel plane gives a glimpse of available energy as well as repeated thermal cycling as long elongated grains were observed and lowest strained region, depicting the high anisotropic structure altogether.
Research of the occurrence and development of metal defects in sulfide stress cracking inducing environment
Authors: Gabelchenko N I , Kidalov N A , Belov A A , Grigoreva N V , Grebnev Yu V , Zhiltsov N P 
Published: April 2021

Abstract
Comparative studies of the metal of equipment after long-term operation in high hydrogen sulfide environment are carried out. To compare their resistance to sulfide stress cracking, the samples were hydrogenated under a stress of 0.6-0.9 of yield stress in a hydrogen sulfide environment. Characteristic of surface defects (blisters and bubbles) were identified, their size and time of occurrence were determined. To study the further development of the process, the samples were subjected to intense hydrogenation for 6 hours at maximum tensile stresses of 0.95 of the yield stress. Then they were cut across for conducting a metallographic study in order to identify the initiation and development of cracks in the metal. It is shown that steel containing cerium, which promoted the formation of relatively small globular sulfides, has the highest resistance to sulfide stress cracking. Such inclusions, in contrast to sulfide stringers of the FeS and MnS type, were not sources of crack initiation. Another source of crack initiation was the boundaries of pearlite and ferrite grains contaminated with microimpurities.
Investigation of the influence of softening modifiers on the knockout of investment castings
Authors: Kidalov N A , Zhiltsov N P , Gabelchenko N I , Belov A A , Grigoreva N V , Zharkova V F 
Published: April 2021

Abstract
The paper considers the problem of laboriousness of cleaning and knocking out investment casting castings from ceramic molds material. The influence of softening modifiers on the structure and residual strength of ceramic samples was analyzed. A magnesium sulfide and copper chloride were selected for the study because of their temperature of destruction, which is in the range of the calcination temperature of the ceramic shells and the temperature of pouring the mold with liquid metal. For comparative studies of particle size distribution after exposure to shock loading the samples were formed from ceramic suspension with introduction of 1.5 and 3 wt.% of softening modifiers. Fractures of ceramics were examined using a two-beam electron scanning microscope “Versa 3D”. It was shown that the use of copper chloride as a softening modifier in the composition of ceramics is facilitate the process of knockout the mold of investment casting.
Strength analysis of composite plates with auxetic honeycomb at static bending by the finite element method
Authors: Mazaev A V 
Published: April 2021

Abstract
In this paper, three-layer composite plates with continuous outer layers and an auxetic honeycomb interlayer of the chiral type based on rotating circles with tangentially attached rods are modeled. The physical and mechanical properties of the D16 aluminum alloy were chosen as the material properties of the layers of the composite plates. In the course of modeling, the discretization and volume of honeycomb structures in composites were varied at a constant thickness of the layers. Under the conditions of static bending of composite plates, load values were determined, at which maximum stresses in composites were equated to the conditional yield strength. The problem was solved using the finite element method in the framework of the theory of elasticity. The aim of this work is to study the influence of the discretization parameter and volume of the auxetic honeycomb interlayer on the magnitudes of load at yield strength stresses for the proposed composite plates.
Modelling and experimental validation of thermoset resin curing during pultrusion
Authors: Vedernikov A N , Safonov A A , Akhatov I S 
Published: April 2021

Abstract
Mathematical modelling of the pultrusion manufacturing process involves many parameters of the resin mixture. In this article thermo-chemical behavior of resin used for pultrusion of glass fiber/epoxy-vinyl L-shaped profiles was characterized. Profiles were manufactured at pulling speeds of 200, 400, and 600 mm·min-1. Dependency of resin specific heat from temperature was determined by differential scanning calorimetry (DSC); the influence of temperature on resin’s thermal conductivity was found; parameters of resin cure kinetics were described. Subsequently, the gained parameters were used for numerical simulation of the pultrusion thermo-chemical problem in ABAQUS software. The temperature and cure degree evolutions obtained from the experiments run at different pulling speeds, and those from the numerical model were shown to be correlated.
The analysis of technologies and modeling for forming parts in isothermal conditions
Authors: Yakovlev Y I , Rakov D L , Sukhorukov R Y 
Published: April 2021

Abstract
One of the most promising ways to parts making is isothermal in a state of superplasticity. Mathematical modeling is an effective way to determine the necessary energy-force parameters of the process. Examples include the method of analysis and selection of technological processes of parts production in isothermal conditions. The technological processes and simulation of deformation-thermal treatment has been carried out. The simulation ensured the formation of the ultra-fine-grain structure in the blanks under the super-plastic roll-out of the shaft from the alloy EhK79. The modeling shows the effect of the microstructure of alloys on the physical-mechanical and operational properties of parts. Model used to predict microstructure evolution is the Johnson-Mehl-Avrami-Kolmogorov model.
Fracture toughness experimental investigations of metal structures from low-alloyed steel
Authors: Chelnokov A V , Erofeev M N 
Published: April 2021

Abstract
Presented are the results of experimental fracture toughness investigations of metal structures from low-alloyed steel (<0.12% C, 0.6-0.9% Cr, 0.8-1.1% Si, 0.5-0.8% Ni, 0.4-0.6% Cu and others), the influence of structural, technological and operational factors taken into account. The results of the investigations can be used to form a fracture toughness data bank of metal structures for mechanical engineering, to conduct of metal structure defectation, to assess of the brittle fracture risk due to the presence of crack defects, to improve the quality control system at the production stage and to solve other problems of ensuring the safety of machinery and equipment.
Research of the strength of structural elements (wing console) for aviation purposes obtained using 3d printing
Authors: Latypov A D , Moskvitin G V , Naumov O V , Pugachev M S 
Published: April 2021

Abstract
3D printing technology allows you to obtain parts with a number of characteristics that have great importance for a number of areas, in particular small aircraft. The article presents a statistical and modal analysis of the naca0012 configuration wing console made of ABS and PLA plastics. These calculations allow us to draw conclusions about the possibility of using printing technology in the development and design of aircraft.
Influence of running-in in dry and wet conditions on the interfacial adhesion of tire tread rubber
Authors: Morozov A V , Makhovskaya Yu Yu , Kravchuk K S 
Published: April 2021

Abstract
To study the running-in effects on the adhesion properties of tire tread compounds, an approach is proposed based on theoretical analysis of experimental load-distance curves. The approach uses the Maugis model of adhesion in an axisymmetric elastic contact. Classical AFM tests with a ball of 450 nm glued to the probe are performed for two different surfaces of the tire tread rubber after running-in in dry and wet friction regimes and for the original rubber surface. It is shown that running-in in wet conditions decreases the surface energy of rubber. Also, running-in in both wet and dry conditions leads to softening of a surface layer of rubber.
Solid lubricating coatings tribological test rig development
Authors: Prozhega M V , Reschikov E O 
Published: April 2021

Abstract
Solid lubricant coatings are commonly used under difficult operating conditions. Compositions containing graphite and molybdenum disulphide are the most used worldwide. Friction and wear tests are carried out to evaluate solid lubricant quality. Tribological properties are characterised by friction coefficient. The following paper presents the design of a ball-on-disc scheme testing rig. The normal load is applied by weights and remains constant during the entire testing time. The sliding speed is controlled by computer and changes smoothly. A strain gauge is installed to friction force determination. The sensor provides direct measurement of the bending strain and also the torque. The latter to be reduced for higher accuracy. To evaluate the design stiffness and contact point displacement the finite element analysis was done. The test rig is developed in accordance with ASTM G99.
Influence of a thin interlayer and a distribution of microdefects on guided wave dispersion properties in an elastic laminate plate
Authors: Eremin A A , Golub M V , Doroshenko O V , u Gurinovich S Y 
Published: April 2021

Abstract
Adequate mathematical and computational models for damaged interfaces and thin interlayers between two solids are necessary for the non-destructive ultrasonic evaluation of the reliability and safety of bonded structures in service. However, the complexity of real interfaces does not allow to describe their mechanical behaviour precisely. In this paper, the problem of elastic guided wave propagation in a multi-layered structure with thin polymeric plies with possible weakened adhesion is treated uniformly employing effective boundary conditions at sublayer interfaces. While for the pristine structure continuity of the displacements and stresses at the interfaces is assumed, for the damaged interfaces, an approach relying on springlike boundary conditions is used. The effect of the internal layer and damaged interfaces b etween sub-layers on an elastodynamic behaviour of a laminate is analysed. Their influence on the dispersion properties of guided waves propagating in a laminated composite structure is illustrated both theoretically and experimentally.
Wake-induced vibration of two-phase conductors connected by spacers
Authors: Shavnya R A , Danilin A N 
Published: April 2021

Abstract
Considering finite element approach applied to modelling of wind-induced split-phase overhead power line conductor oscillations caused by aerodynamic wake. Model represents an aeroelastic system including twin bundled conductor with spacers. Modified Simpson’s theory is used for conductor wake coupling simulation. Assuming small oscillating conductor deflection from element ends connection line compared to element length, thus the element tension and element tensile strain can be considered as constant values. Strain, as function of transverse displacements, defines as quadratic approximation. Element absolute displacements and twisting angles, together with Ritz’s method coefficients is taken as generalized coordinates, in which conductor move equations are compiled with non-linear elastic, inertial and aerodynamic forces. Appropriate linearized small oscillation equations near the static equilibrium are derived – those can be used for defining system flutter critical wind velocity. An example with split-phase twin bundled conductor, three-sub-span system is presented.
Bearings stiffness parameter estimation by sensitivity method
Authors: Vlasevskiy V N , Belkin A E , Ivanov I I 
Published: April 2021

Abstract
The sensitivity method is applied for bearings stiffness parameter estimation of an experimental rotor system. For model updating, critical shaft speeds are used. The reliability of the sensitivity method is tested on a simple example. The results show that this method can be successfully applied to adjust the finite element model to the experimental data.
Contact-communicative approach to research and development the smart prosthesis for the transradial amputees
Authors: Kovalev N S , Solovyev A A , Sergeev A M 
Published: April 2021

Abstract
The article is devoted to further researches and developments of the smart prosthesis for transradial amputees. Describes the solutions of thematically related tasks to increase the effectiveness of the amputee’s interaction with the external subject-spatial and social environment. One of the tasks is to study the behavior of experimental resistive pressure sensors protective materials in order to optimize sensor contact. Another task is to the provision with the help of conductive materials of the effect of “digital touch” with the aim of creating the amputee through the agency of the screen-compatible prosthesis conditions for active social communication.