bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and Characterization of (Ag2S)x(ZnS) Heteronanostructures
Authors: Sadovnikov Stanislav I. , Gerasimov Eugeny Yu. 
Published: January 2021

Abstract
(Ag2S)x(ZnS) heteronanostructures were synthesized by two-stage chemical codeposition of silver and zinc sulfides using aqueous solutions of zinc nitrate, silver nitrate, sodium sulfide, trisodium citrate and Trilon B. Prepared heteronanostructures were characterized for phase composition and nanoparticles size using X-ray diffraction and the high-resolution transmission electron microscopy. The size of Ag2S nanoparticles in the obtained heteronanostructures depends on the ratios of reagent concentrations and ranges from 9 to 30 nm, the size of ZnS nanoparticles is equal to 4-5 nm.
Effect of nanostructuring on the thermal expansion and saturation magnetization of Fe - 36% Ni and Fe - 50% Ni alloys
Authors: Krylova K A , Bitkulov I Kh , Mulyukov R R 
Published: January 2021

Abstract
Nanostructured samples of Fe - 36% Ni (Invar alloy) and Fe - 50% Ni alloys with a fragment size of about 100 nm were obtained by high pressure torsion using Bridgman anvils. The formation of the nanostructure leads to a decrease in the coefficient of thermal expansion of the Fe - 36% Ni and Fe - 50% Ni alloys by 2.2 and 1.2 times, respectively. Annealing of the Fe - 36% Ni alloy after nanostructuring leads to the formation of a dispersed bcc phase, which is not observed in the coarse-grained Invar alloy. The release of this phase affects the anomalous growth of thermal expansion (above the values typical for a coarse-grained Invar alloy) and the retention of saturation magnetization at temperatures above the Curie temperature of 260 °C. It is found that heating the nanostructured Fe - 50% Ni alloy above the Curie temperature (460 °C) saves the saturation magnetization. By analogy with the results for the Fe - 36% Ni, it can be assumed that this is due to the appearance of a dispersed bcc ferromagnetic phase. Detailed structural analysis will be carried out in future works.
Effect of friction stir processing on the strengthening of the 2024 aluminum alloy
Authors: Valeeva A Kh , Akhunova A Kh , Imayev M F , Fazlyakhmetov R F 
Published: January 2021

Abstract
A study of the influence of the tool pin length on the strengthening of the 2024 aluminum alloy under friction stir processing (FSP) was carried out. According to the results of real and model experiments, it was found that for a workpiece with a thickness of 3.0 mm, the necessary and sufficient pin length is 2.0 mm, because in this case, mixing throughout the thickness of the workpiece is provided. It was found that during the FSP of the 2024 alloy, solid-solutional hardening of the processed area occurred due to the release of particles of intermetallic phases.
Surface polymorphism of silica nanoparticles
Authors: Syzrantsev V V , Paukstis E A , Larina T V 
Published: January 2021

Abstract
A comparative study was performed on the surface properties of silica nanoparticles synthesized by various methods using FTIR, UV-Vis DRS and X-ray diffraction. It is shown that different methods of synthesis affect the surface properties of nanoparticles while maintaining the phase composition of the material. It is also shown that the nanoparticles of each material have unexpected properties. In particular, a significant difference was observed in the concentration of Lewis centres for the samples. This variation in properties indicates the importance of accurately characterizing the surface properties of nanoparticles as they determine the interactions of nanoparticles with other materials.
Modified hybrid CdSe/ZnS quantum dots and their size dependent unique characteristics
Authors: Ishankulov A F , Shamilov R R , Galyametdinov Yu G , Mukhamadiev N K 
Published: January 2021

Abstract
In this study, CdSe-based hybrid CdSe/ZnS quantum dots were synthesized. Their optical properties have been characterized using the absorption and luminescence spectroscopy methods. When the ZnS shell was grown on the surface shell of CdSe nanoparticles, the photoluminescence stability and the shelf life of the quantum dots increased significantly. The energy of the outer shell has increased. The absorption and luminescence spectra shifted to a shorter wavelength range. The size of the nucleus decreased from 3.7 nm to 2.8 nm. The surface was stabilized with oleic acid as an active ligand. After stabilization with a surfactant, the average total hydrodynamic size of the nanoparticles increased.
Study of the deformation behavior and structure formation of Ti-Zr-Nb shape memory alloy
Authors: Sheremetyev V A , Akhmadkulov O , Komarov V S , Korotitsky A V , Galkin S P , Andreev V A , Prokoshkin S D 
Published: January 2021

Abstract
The deformation behavior and structure formation of the Ti-19Zr-14Nb (in at. %) shape memory alloy have been studied. The as-cast ingot was subjected to multi-axis forging at a billet heating temperature of 1050 °C and then to rotary forging at 600 °C. Plastometric compression tests of the forged alloy were carried out at a strain rate 0.1 s−1 at temperatures of 600-1000 °C, the strain degree is not more than 0.7. The obtained flow curves and the results of studying the grain structure and hardness were used to determine the features of the thermomechanical behavior of the material. The study of the microstructure showed that under these processing conditions, the processes of dynamic polygonization and dynamic recrystallization occur simultaneously. According to the obtained hardness measurement results, it can be assumed that in order to achieve a low Young’s modulus and perfect superelastic behavior, deformation must be carried out at temperatures of 700-800 °C.
Superplastic behaviour and solid state weldability of a polycrystalline heavily alloyed nickel-base superalloy
Authors: Mukhtarov Sh Kh , Imayev V M , Ganeev A A , Shakhov R V , Logunov A V 
Published: January 2021

Abstract
Effective thermomechanical treatment has been developed for the heavily alloyed Ni- base superalloy produced via ingot metallurgy with a high content of γ’-forming elements. It allowed us to eliminate dendritic segregation and to obtain a uniform fine-grained structure with a γ grain size of d=5-15 μm. In the fine-grained condition the superalloy exhibited superplastic properties at 1125-1175°C (δ>300%, σ=10-27 MPa, m>0.3). Pressure welding experiments were performed at 1150°C for samples with the fine-grained structure. The solid-phase joint was formed only after compression to the strain of 50%. It was shown that insertion of a nanocrystalline interlayer of the same superalloy between the welded samples facilitated formation of the solid-phase joint.
Experimental study of the influence of different carbon content on the shrinkage kinetics and structure evolution of ultralow-cobalt hard alloys during spark plasma sintering
Authors: Lantsev E A , Nokhrin A V , Boldin M S , Malekhonova N V , Andreev P V , Smetanina K E , Popov A A 
Published: January 2021

Abstract
The features of the compaction of plasma-chemical WC - (0.3; 0.6; 1) %Co nanopowders with the addition of 0.3 and 0.5% graphite during high-speed spark plasma sintering have been investigated. It was shown that an increased concentration of oxygen adsorbed on the surface of plasma-chemical nanoparticles during mixing with graphite, as well as the effect of graphite itself, which leads to a decrease in the activation energy of sintering due to a decrease in the intensity of the formation of particles of the η-phase in the “oxidized” WC-Co nanopowders, are the main structure features of ultralow-cobalt hard alloys. Samples of finegrained ultralow-cobalt hard alloys with increased hardness and fracture toughness were obtained (for a WC-0.6% Co-0.3% C hard alloy with an average grain size of ∼ 1-1.5 pm, the hardness is Hv = 20.2-20.5 GPa with a minimum crack resistance coefficient K
ic
= 9.2-10.4 MPa-m1/2).
Molecular dynamics simulation of diffusion in Mg-Al system under pressure
Authors: Polyakova P V , Baimova J A 
Published: January 2021

Abstract
The Mg-Al composite material possesses a large potential value in practical application due to its excellent properties. Molecular dynamics with the embedded atomic method potentials is applied to study aluminium-magnesium (Al-Mg) interface bonding during deformation. Study of fabrication techniques to obtain composites with improved mechanical properties, careful investigation of phase composition, dynamics and kinetics are of high importance. The loading scheme used in the present work is the simplification of the scenario, experimentally observed previously to obtain Al/Cu composites. It is shown that shear strain has a crucial role in the diffusion process. The results indicated that the symmetrical diffusion took place in the Mg-Al interface during deformation. Tensile tests showed that fracture took place in the Mg part of the final composite sample, which means that the interlayer region where the mixing of Mg and Al atoms observed is much stronger than the pure Mg part.
Model calculation of the phase diagram of Cu-Te
Authors: Kurbangulov A R , Tsygankova L V , Tikhonov E V , Bikkulova N N , Safargaliyev D I , Nigmatullina G R , Akmanova G R 
Published: January 2021

Abstract
The paper presents the results of model calculations of the phase diagram of the Cu-Te system. A comparative analysis of the experimentally obtained data with theoretical calculations for the obtained model compounds is presented.
Crystallogeometry and energy of planar superstructure defects of ternary alloys
Authors: Khalikov A R , Nguen V T , Valitov V A , Dmitriev S V 
Published: January 2021

Abstract
Planar superstructure defects have a great influence on the mechanical and functional properties of ternary Heusler alloys; however, their complete crystallogeometric and energy analysis is lacking in the literature. In this work, Heusler alloys of stoichiometric composition X2YZ of the L21 superstructure are analysed. An expression is given for finding the planes of occurrence of all possible planar superstructure defects. It is established that among them there are only shear and thermal antiphase boundaries. The results obtained are useful for analyzing slip systems of the considered family of alloys and the configuration of magnetic domain walls.
Peierls-Nabarro potential for kinks in nonlinear chains
Authors: Bebikhov Yu V , Dmitriev S V 
Published: January 2021

Abstract
The aim of this work is to review various discrete models supporting topological solitons, in which the Peierls-Nabarro potential can be significantly lowered or even reduced to zero. These theoretical results are discussed in relation to the Peierls stresses for dislocations in a variety of crystals. Derivation of the discrete models free of the Peierls-Nabarro potential has been done by a number of authors with the use of analytical calculations. Peierls stresses for dislocations in crystals described in the literature have been estimated within the framework of molecular dynamics and ab initio simulations. These theoretical results are discussed in connection with the variability of the Peierls stress in different crystals.
A6061/B4C MMCs fabrication, experimental investigation and prediction of properties
Authors: Shyn C S , Rajesh R , Dev Anand M 
Published: January 2021

Abstract
The growing demand for light composite materials is the new trend in engineering solicitations. The objective is to fabricate light weight composite material through less expensive method. In this work, nine different composites have been fabricated with A6061 as base matrix and reinforced with 3%/6%/9%wt%B4C having particle sizes of 30µm, 40µm and 60µm respectively. The investigation of the actual density and hardness of the fabricated composite is the major task. The densities of the fabricated composites were investigated with Two-way Analysis of Variance(ANOVA). Also the densities of the composites were predicted with Taguchi, regression and Poisson method. From all of these fabricated composites 60µm size, 9% wt B4C particle reinforced A6061/B4C composite shows lighter density and this value were nearest to Poisson predicted value.
Network in Sequential Form: Combine Tree Structure Components into Recurrent Neural Network
Authors: Zubair Swaleha , Singha Anjani Kumar 
Published: January 2021

Abstract
Smaller units nestled in larger units-a natural language that is hierarchically ordered. Smaller sections are replaced because of the completion of the bigger constituencies. The basic LSTM architecture does not have a clear choice for modeling the hierarchy of components as separate neurons do not require knowledge to be monitored on various time scales. The idea in this paper is to introduce inductive bias by grouping the neurons. The modifications we create to the master input vector are changed in all neurons following the order of the specified neuron and forget windows. Four activities on which we can achieve strong care unattended sorting, logical inference, and language modeling and guided syntax evaluation.
Corrosion Resistant Superhydrophobic Aluminum Alloy: A Review
Authors: Panda Bijayani 
Published: January 2021

Abstract
Aluminum alloys are widely used in aerospace and space applications due to their high strength to weight ratio. The most prevalent method to prevent corrosion of aluminum alloys is anodic oxidation or anodization treatment. The anodized layer is porous and hence there are chances of penetration of moisture and corrosion of underlying substrate underneath the anodized layer. Surface modification of the aluminum alloy by superhydrophobic coating is a very attractive method to improve the corrosion resistance of aluminum alloys. The inspiration for the fabrication of superhydrophobic coatings is obtained from various examples in nature such as strider’s legs and lotus leaf. The fabrication of superhydrophobic coatings involves two important steps; generation of a rough surface and deposition of low surface energy material. The present paper reviews the various researches undertaken for the production of superhydrophobic surfaces on aluminum and aluminum alloys. Finally, the scope of future research activities in the fabrication of superhydrophobic coatings has been discussed in the paper.
Schematic review of plasma arc oxidation process for Mg Alloy Bio Implants
Authors: Jadhav Priya , Bongale Arunkumar , Kumar Satish 
Published: January 2021

Abstract
The biomaterials are having diverse applications in temporary implants. The implant performance and compatibility inside the human body element are enormous factors of research. The implant material requires excellent mechanical properties that can endure corrosion, higher stress, load-bearing capacity. The compatibility with local tissues of the human body is a crucial point of tolerance. This article is based on a review of papers in the area of Magnesium alloy bioimplants. The purpose of the review is to understand different methods and recent developments for Mg alloy material in the domain. Different methods for producing coatings and the effect of the addition of nanoparticles are discussed.
An Insight: Machining of Titanium Alloys & Associated Tool Wear
Authors: Sisodiya Mangal Singh , Bajpai Vivek 
Published: January 2021

Abstract
Titanium alloy has some important applications in the aerospace industries along with other sectors, but its machinability efficiently is still a topic of intent research. Several factors work together to hinder its effective machining by various cutting tools. Although work has been done to some extent by some well cutting tools such as carbide tools however, very little work has been stated and established by using CBN tools or cryogenically treated CBN tools. The review has been done elaboratively to bring out various aspects of titanium alloy and its machining by various conventional cutting tools along with the CBN cutting tool.
Influence of deposition parameters on Tribological Performance of HVOF Coating: A review
Authors: Vats Alok , Kumar Arun , Patnaik Amar , Meena M L 
Published: January 2021

Abstract
Any mechanical component stationary or in relative motion is exposed to severe surface phenomena like corrosion, wear, abrasion etc. To address these issues various surface treatment processes are in industrial practice. In recent times, coatings techniques have been identified as cost effective alternative to other surface modification techniques. Thermal spray technique proves to be the prominent method to among a large variety of processes available. HVOF method owing to its capability to provide wear and corrosion resistant coatings with characteristics like high hardness, adhesion, density (porosity <1%) is widely accepted across industries. Process parameters seems to have significant influence on coating properties like porosity level, oxide content, micro hardness and tribological performance of coating. This paper intends to investigate the effect of above mentioned process deposition parameters on physical, mechanical, wear, erosion and corrosion properties of coating.
Development of an Internet of Things (IoT) based Lockout/Tagout (LOTO) device for Accident Prevention in Manufacturing Industries
Authors: Kumar S , Tauseef S M 
Published: January 2021

Abstract
Despite all the technological advances, safety remains the biggest challenge in Industries. Each year, thousands of electrocutions and hundreds of machinery-related accidental deaths are happening. A number of these accidents involve inadequate, unauthorised or improper use of hazardous energy control procedures, also known as lockout/tagout (LOTO) procedures. Although the organizations like Occupational Safety and Health Administration (OSHA), USA, The National Institute for Occupational Safety and Health (NIOSH) and others have defined a very detailed LOTO procedure, however, these LOTO procedures have many manual activities. With the emergence of IoT (Internet of Things) these manual activities can be combined with automated activities thereby enhancing safety. IoT based devices can be implemented to ensure authorized access to hazardous areas around operating machinery, improve documentation and monitoring of service during repair and/or maintenance that requires shutdown of the machinery, and prevent unexpected, unauthorised start up, or movement during maintenance of machinery or related activities. Acknowledging the importance of IoT enabled safety devices NIOSH is also exploring the possibility of implementing IoT based technologies to provide intelligent machine monitoring as part of a comprehensive LOTO program. This paper presents the development of an IoT based LOTO device, its implementation and effectiveness in improving safety and accident prevention. It is found that the IoT based LOTO device is effective in accident prevention (from 47 to 0 incidents) and its performance (from 697 to 349 Seconds) is reliable.
Fracture analysis of edge cracked FGM plate under compressive load along crack
Authors: Mishra Kundan , Lal Achchhe , Sutaria B. M. 
Published: January 2021

Abstract
Fracture analysis of FGM plate with edge crack under compressive point load along crack is carried out by using extended finite element method (XFEM). In this present work a FGM plate where material properties vary along width with edge crack is considered for the study. The mathematical formulation is carried out in MATLAB and the stress distribution and mixed mode stress intensity factors (SIFs) are obtained for different position of point load. The validation study is carried out for developed MATLAB code with previously published research paper and then fracture analysis of FGM plate with crack under compressive point load along crack is investigated. The present study is carried out to understand the fracture resistance of edge crack FGM plate when the action of load is along crack.
Numerical study of heat transfer enhancement through a circular tube fitted with and without rectangular cut twisted tape insert
Authors: Hakim M U , Hridoy M W , Islam M I , Rayhan M S 
Published: January 2021

Abstract
Numerical simulations have been carried out to investigate the heat transfer enhancement in a tube fitted with a rectangular cut twisted tape insert and compare the data with a smooth tube. For this purpose, CFD (Computational Fluid Dynamics) was utilized to simulate the three-dimensional model with appropriate boundary conditions. The numerical results show that the flow field can be adjusted and the thickness of boundary layer can be decreased by inserting the rectangular cut twisted tape insert so that the heat transfer can be enhanced in the tube. Water was used as the working fluid. The results obtained show an increase in Nusselt number as a result of increasing heat transfer rate for the tube provided with rectangular cut twisted tapes than the plain tube. The pressure drop across the tube wall for twisted tape with the rectangular cut is higher than the plain tube. This increase in the rate of heat transfer is due to the introduction of secondary swirl flow (due to twisted tape) along with the primary flow.
An Experimental Study on Machining of AISI H - 13 Steel Using Dimple-Textured and Non-Textured Tungsten Carbide Cutting Tools
Authors: Vignesh G. , Barik Debabrata , Aravind S. , Ragupathi P. , Arun M. 
Published: January 2021

Abstract
Fabrication of micro-dimples at the rack surface closer to the cutting region of the tungsten carbide tool will induce the tribological modifications at the tribo-contact surfaces. The motive of this work is to find the influence of micro-dimples fabricated on the cutting tools during turning operations. Linear arrays of dimple-textures with various geometrical aspects (dimple diameter and depth) and area density ratio were prepared using laser marking technique. The influence of surface-texture pattern is experimentally analysed through dry machining of AISI H – 13 steel using a dimple-textured tungsten carbide cutting tool. The responses of cutting temperature and cutting force generated during the turning operation were analysed. It shows improvement in machinability in terms of wear rate reduction in dimple-textured tools. Optimizing the dimension of micro-dimples (diameter of 90µm, depth of 60µm) results in a 10% reduction in tool wear rate.
Dissimilar Metal Welds used in AUSC Power Plant, Fabrication and Structural Integrity Issues
Authors: Singh Sanjay , Singh Alok Bihari , Kumar Manoj , Meena M L , Dangayach G S 
Published: January 2021

ABSTRACT
In the current era, the Advanced Ultra Super-Critical (AUSC) plants have been used to substantially increased efficiency with environmental protection. AUSC components boiler header, re-heater and super-heater tube etc. are fabricated by using advanced materials to join by the welding process. Any failure of the power plant can lead to grave consequences, not only of substantial financial losses but additionally immensely treasured and irreparable human life loss. In this review, the dissimilar metal welds (DMWs) have many issues such as metallurgical issue, cracking, carbon migration, welding electrode selection, creep properties, suitable welding process and structure integrity issues which enhanced the failure of weldments. The results of our review showed that DMWs of AUSC power plant are joined by activated flux Tungsten Inert Gas (A-TIG) and Pulse A-TIG process to increase the productivity and cut the significant fraction of cost. However, A-TIG process with Post Weld Heat Treatment (PWHT) improved the mechanical properties and high-temperature creep resistance properties of DMWs. This state of the art is encouraged the researchers about the enormous future scope.