bluuebunny/crossref_metadata_2025_split huggingface dataset:
First-principle calculation of hydrogen adsorption on the surface of Ni3Al (110)
Authors: Li Fu , Du Xiaoming , Liu Jide 
Published: July 2023

Abstract
Nickel-based superalloy has good mechanical properties and corrosion resistance, and is widely used in the oil and natural gas industry. However, hydrogen brittle is a serious problem that the application of nickel-based superalloy must face. In this study, the first principle calculation method based on density functional theory was used to calculate the adsorption energy of the molecules of hydrogen and hydrogen atoms on the Ni3Al (110) surface. The calculated results show that the adsorption of hydrogen molecules on the surface of Ni3Al (110) is physical adsorption. The preferential adsorption site of hydrogen molecules is at the top site of Ni atoms, and Ni can promote the dissociation of hydrogen molecules. Hydrogen atoms tend to adsorb in the bridge, and the Ni-Ni bridge site is the preferential adsorption site.
Experimental study on DC corona charging characteristics of powder particles with different properties
Authors: Fang Guofeng , Chen Liang , Shi Weidong , Xie Changyou , Zhang Kaichuang 
Published: July 2023

Abstract
In this paper, the charging characteristics of powder particles with different properties under DC discharge corona conditions were studied experimentally. The influence of different charging voltages and different charging structures on the charge-mass ratio of particles was analyzed through ELPI measurement. The experimental results show that the far-field charging structure of the electrode can effectively charge powder materials like Graphite micro powder, copper sulfide, talcum powder, and porous material (Si Al) within the particle size range of 0.1 μm−10 μm; When there is no streamer or spark between the charging electrode and the grounding electrode of the charging device, the higher the charging voltage is, the higher the degree of air ionization is, and the better the charging effect on particles is; Under the same charge condition, the charge-mass ratio of particles decreases with the increase of particle size.
Numerical Simulation Analysis of Three-phase Submerged Arc Furnace Using the Multi-field Method
Authors: Zhao Jincheng , Zhang Xiuheng 
Published: July 2023

Abstract
To reveal the distribution law of the multi-physics field in the smelting of the submerged arc furnace, the temperature distribution in the furnace for a given electrode diameter was studied, and the multi-physics field coupling model of the submerged arc furnace was established, based on Maxwell’s equation, Ohm’s law, numerical analysis of fluid governing equations and heat transfer mechanism. The results show that the current density is mainly affected by the skin effect on the surface of the electrode, with a maximum value of 35000 A/m2; the Joule heat is mainly concentrated at the bottom of the electrode in the material layer; the maximum value of the magnetic flux density is at the electrode pole center circle, about 0.02 T; the flow of the fluid in the molten pool is affected by the Lorentz force and gravity, and the distribution of the Lorentz force in the slag layer is more obvious; the maximum temperature in the furnace reaches 2500°C and is located at the bottom of the electrode, which is gradually transferred from the material layer to the slag layer.
Numerical simulation study on progressive bending of magnesium alloy grid panel
Authors: Yun Hongjie , Wang Zhongtang , Liang Haicheng , Li Yanjuan 
Published: July 2023

Abstract
Research and development of magnesium alloy integral panel forming technology to replace existing titanium alloy and aluminum alloy panel materials are of great significance for saving aluminum and titanium resources. The material flow law during progressive bending technology of panel (PBTP) was analyzed by numerical simulation study. The deformation forming parameters of PBTP for Mg alloy grid panel and panel size control parameters are defined. The process parameters include deformation temperature, bending deformation coefficient, and reduction speed. The size and accuracy control parameters include the width of the bending die, pressing height, and feed rate. The panel radius was related to the width of the bending die and the height of the reduction. With increase of forming temperature, maximum damage coefficient, maximum equivalent stress and maximum equivalent strain reduce. With increase in bending deformation coefficient, maximum damage coefficient, maximum equivalent stress and maximum equivalent strain increase. Based on simulation and experimental results, reasonable forming parameters for PBTP of AZ31 Mg alloy grid panel was obtained. Magnesium alloy panel components were successfully processed by progressive bending technology. The influence of die width and pressing height on panel radius was analyzed. The numerical simulation results were consistent with experimental results. The maximum relative error was 3.5%.
Damage formation and force analysis of barrels
Authors: Ji Lu , Xu Zhao , Pan Qihua , Zhang Hong 
Published: July 2023

Abstract
The barrel is one of the important parts of artillery. At the same time, when firing, the bore needs to withstand the high temperature and high pressure powder gas as well as the impact and friction of the projectile, and different damage forms such as cracks, wear and dechromium on the bore will appear. However, the wear of the bore is one of the main reasons for the error of the firing accuracy, and it can even cause other security risks. In this paper, the common damage formation and the force on the tube bore body during the firing were analyzed, so as to further estimate the life of the body tube and provide a basis for the structural health monitoring of the body tube and other key components.
Research on Defects Control of Niobium Tungsten Alloy by Laser Welding
Authors: Xu Fei , Li Yulong 
Published: July 2023

Abstract
The laser welding experiment of Nb521 niobium-tungsten alloy with 1.0mm thickness was carried out, and the effects of different welding edge preparation states, including fast wire cutting + milling and slow wire cutting + no milling, on the weld formation were analyzed. The results show that the laser weldability of the niobium-tungsten alloy is very good. The welding parameters are in a wide range, and good weld formation can be obtained easily. The effect of the welding edge preparation states on weld formation is very small, and all of the welded joints are broken in the base metal zone far away from the weld beam. Based on laser welding, the forming analysis of argon arc repair welding was carried out. The defects such as cracks and oxidation could be controlled effectively by optimizing the welding process. When the ratio of argon arc repair welding is in the range of 30% to 50%, the welded joints still have good tensile properties. The average tensile strength reaches 98.9% of the base metal and the average elongation after fracture reaches 83.8% of the base metal.
CNC machining optimization of hydro-turbine runner blade based on VERICUT
Authors: Han Xuesong , Li Jianwen , Liu Qibo , Lu Shangping 
Published: July 2023

Abstract
Aiming at the problem of low production efficiency caused by the unreasonable setting of cutting parameters for CNC machining of hydro-turbine runner blade, the Force module of VERICUT software is used to analyze and compare the cutting force, the cutting power, and the material removal rate of the blade under different cutting parameters, find the cutting parameters that can give full play to the machining capacity of the machine tool, and use the optimization function of Force to automatically adjust the feed speed in the machining program. The test results show that after the optimization of cutting parameters, the production efficiency of the NC machining program is significantly improved, and the cutting power of the machine tool spindle is stable.
Fracture failure analysis and prevention of carbon fiber thin wall crossbar
Authors: Rong Jian , Lv Haiqing , Sun Zijie , Xu Ting , Chen Xuesheng , Zhang Youyi , Zhang Zhipeng , Feng Tao 
Published: July 2023

Abstract
The fracture failure of a crossbar occurred in a routine deployment test of a satellite ring antenna truss structure. In this study, the fracture cause of the carbon fiber thin wall crossbar was analyzed using body microscope observation, scanning electron microscope observation, metallographic analysis, hardness analysis, XRD analysis, and other methods. The analysis results show that the failure bar had interlaminar damage and local crack or breakage before this deployment test. This defect has further expanded and intensified in the multiple deployment tests of the circular antenna, resulting in the gradual decline of the local stiffness of the crossbar, and finally the buckling failure. By using the bottom plate reflection method to carry out non-destructive testing on the rod, it can effectively avoid false inspection and missing inspection of defects.
A control method of excess material in cold plate processing with a runner
Authors: Li Hui , Wang Tao 
Published: July 2023

Abstract
Cooling plates are widely used in modern electronic equipment and usually contain channels with a complex structure. Welding, heat treatment, machining, and turnover on cooling plates are often accompanied by waste such as mental swarf. The waste could enter the plates and block the liquid inlets or outlets, thereby affecting the normal operation of electronic equipment. In light of this, we design a labyrinth seal system for heat treatment and a sealing block for mechanical processing with proper techniques. The research results show that waste can be prevented from entering the channel and help keep the entire cooling system clean.
Secondary-phase Transformation of Duplex Stainless Steels during Industrial Manufacturing
Authors: Li Xianchao 
Published: July 2023

Abstract
A new type of lean S32205 duplex stainless steel was studied on its secondary phase formation during industrial manufacturing. Different from the common S32205 duplex stainless steels, such lean S32205 duplex stainless steels contain more carbon and nitrogen elements, which promotes the formation of Cr2N and Cr23C6 secondary precipitations. The secondary-phase transformation is preferred at boundaries, either in the ferrite phase or at interphase interfaces after rolling, and even a few secondary precipitates can be found at the as-cast ferrite grain interiors as well. The influence of the secondary phase transformations on pitting resistance and hot ductility was investigated.
Dynamic Characteristics of Thin Film Structure with Concentrated Mass
Authors: Cheng Jingsong , Wang Sheng , Nie Ying , Song Lin 
Published: July 2023

Abstract
Aiming at the design and analysis of flexible film building rigid flexible large complex structure system, this paper carried out the simulation analysis of dynamic characteristics of thin film structure with concentrated mass. The structural connectors with high stiffness and relatively concentrated mass are simplified as concentrated mass. The flexible thin film structure is simplified as a biaxially tensioned cross film material sample. The influences of pretension, quality, and concentrated mass of the size on the natural frequency of cross film material samples are analyzed. The results show that the natural frequency of the sample increases with pretension, decreases with the quality of the concentrated mass, and increases with the side length of the connection between the concentrated mass and the sample. The fundamental frequency of the sample is independent of the height of the concentrated mass, but the second frequency decreases with the height of the concentrated mass. The research results provide a theoretical basis for the overall design and analysis of building film structure and the further dynamic experiments of film material samples with concentrated mass.
Civil Aircraft Multi-Objective Design Optimization for Cost and Emission Reduction
Authors: Mu Tengfei , Tao Li 
Published: July 2023

Abstract
With the rapid development of civil air transportation network in recent decades, aviation emission is continually increasing which may lead to irreversible damage to the environment. Besides, the operating cost of civil aircraft also should be reduced for creating greater value for human activities. Consequently, eco-efficiency aircraft should be developed for aviation sustainable development, and there are some higher constraints on the aircraft design, especially on the cost and emission. In this research, the developed multi-objective design optimization technique, along with the aircraft general and aerodynamic design approach, as well as the operating cost model and integrated emission model, is used to conduct the aircraft concept design, leading to the minimum operating cost and emission. Further, the Pareto solution set, related to the temperature change which is caused by emission and cost, is obtained to conduct eco-efficiency aircraft design optimization.
Influencing Factors on Plasticity and Life of Hydraulic Pipelines for Logging
Authors: Fan Qilong , Li Liang , Wang Shuni , Cui Huanyong , Wang Hui , Liu Haining 
Published: July 2023

Abstract
The bending behavior of the hydraulic pipeline on the roller of the logging winch will cause a certain plastic deformation of the hydraulic pipeline, which has a certain influence on its performance. In view of the above problems, this paper uses finite element analysis software to analyze the plastic deformation law of hydraulic pipelines under different bending radii. It can be found from the analysis results that during the bending process, the plastic deformation of the metal continuous capillary gradually increases with the neutral layer outward. In the range of the bending radius from 75 mm to 150 mm, with the increase of the bending radius, the equivalent plastic deformation decreases from 3.5×10-2 to 1.46×10-2. The changing trend of life also tends to be gentle with the increase of the bending radius, and the number of cycles increases from 25000 to 398107. The analysis of the plastic deformation law and the life of hydraulic pipelines provides a reference for designing winch drums.
Experimental exploration of metallic chloride salt corrosion of stainless steel sheets
Authors: Wang Xiaodong , Zhu Yanjun , Lyu Haiyang , You Yangyang , Zhou Jiaao , Zhang Erbo , Wei Kunyu 
Published: July 2023

Abstract
In recent years, biomass generation in China has been steadily increasing. The high-temperature corrosion of the heating surface of biomass boilers is mainly caused by HCl and alkali metal chlorides in the sediment, which seriously affects the efficiency and safety and the degree of economic utilization of biomass energy. In this paper, the corrosion products were characterized by total-immersion experiments under constant temperature on different thicknesses of 304 stainless steel in various concentrations and types of alkali metal chloride salts. Through thermal microscopy scanning and XRD experiments, the composition, characteristics, and microscopic morphology of corrosion products on stainless steel flakes are determined to find out the corrosion mechanism of stainless steel flakes in solution alkali metal chloride salts. The results show that in a water bath at 80 °C, alkali metal chlorides weaken the corrosion resistance of the stainless-steel sheet by destroying the integrity of its reticular structure, thus promoting the chemical reaction between the iron contained in the stainless steel and other elements to generate various types of corrosion products rich in iron. Meanwhile, among various alkali metal chloride salts, the catalytic effect of saturated CaCl2 on the corrosion of 0.1 mm and 0.01 mm stainless steel sheets at 80 °C is the most significant.
The Effect of Melting-Casting and Heat Treatment Process on the Hardness of 2618 Aluminum Alloy
Authors: Chen Shanshan , Huang Haoran , Chai Zhizhang , Zhu Xianqi 
Published: July 2023

Abstract
The influence of melting-casting and heat treatment processes on the hardness of 2618 aluminum alloy was investigated by hardness testing. The results show that the hardness of 2618 alloy increases at first and then decreases with the prolongation of melt holding time, and the hardness reaches the peak value when the holding time is 30 min. With the increase of melting-casting temperature, the hardness of the alloy increases rapidly at first and then decreases slightly. The hardness of the alloy first increases and then tends to be stable as the homogenization temperature rises and decreases rapidly, and then tends to be stable with the extension of melt holding time. Moreover, the effect of homogenization temperature on the hardness is more obvious. With the increase of aging temperature, the hardness of 2618 alloy increases first and then decreases, and the hardness of the alloy increases sharply first and then decreases with the increase of aging time. The hardness of the alloy reaches the peak value of 68.88 HRB after aging at 190 °C for 12 h.
The effect of chipbreaker parameters on the cutting temperature of Inconel 718 alloy based on the secondary development of Abaqus
Authors: Li Chengbo , Chen Shunqing 
Published: July 2023

Abstract
Inconel 718 alloy has high strength and generates high temperature during cutting. The impact of chipbreaker dimensions on the cutting temperature when cutting Inconel 718 alloy was investigated. Based on the finite element software Abaqus, a kernel script program is written to develop a cutting simulation plug-in that can quickly change parameters so that users can select tools with different chipbreaker structures, and quickly set tool and cutting parameters to complete a series of pre-processing operations such as modeling, assembly, and meshing. The impact of chipbreaker channel characteristics on the cutting temperature of Inconel 718 alloy is also analyzed by example to verify the effectiveness of the developed plug-in. It provides a convenient tool for subsequent control and optimization of cutting temperature.
Simple Synthesis of AuPd Aerogel as a Self-Supporting Electrocatalysts with Excellent Performance
Authors: Zhang Peina , Liu Tao , Li Mingfei , Wang Shengnan , Cao Renyu 
Published: July 2023

Abstract
Direct ethanol fuel cell (DEFC) has the advantages of low pollution emissions, easy to carry, and high energy density. However, the development of fuel cells is limited due to the low catalytic activity and poor stability of electrode catalyst materials. Precious metal aerogels not only have three-dimensional self-supporting network structures but also have excellent properties of precious metals, which have very good catalytic efficiency for ethanol. In this study, bimetallic aerogels with varying Au/Pd ratios were prepared, and their impact on the electrocatalytic performance of ethanol was investigated.
Influence of Natural Aging on Microstructure and Mechanical Properties of Gravity Casting Al-Cu-Mg Alloy
Authors: Ding Jingen , Ji Kaiwen , Jin Kang , Liu Zhenghui , Li Longfei , Chen Lin , Zhang Yang 
Published: July 2023

Abstract
For the Al-5.0Cu-0.8Mg alloy fabricated by gravity casting, the 12h natural aging was added between the solution and artificial aging to study its influence on the microstructure and mechanical properties. The transitional phases form during the natural aging following the solution, leading to a significant increase in microhardness. Meanwhile, this microstructure variation accelerates the formation and growth of stable strengthening phases in the same artificial aging. Unfortunately, the 12 h natural aging added in this work excessively coarsens the precipitation, which results in the mechanical properties reduction including ultimate stress from 332 MPa to 302 MPa, especially the elongation from 8.1% to 3.7%. The results indicate that exploring the favorable match of natural and artificial aging is significant to further finely control the precipitation characteristic, which contributes to better mechanical properties of the Al-Cu-Mg alloy.
Comparison of mechanical properties of interbody fusion cage with three general structures
Authors: Chen Yi , Ge Xiaohong , Wang Jian , Zeng Da , Wang Jinhuo , Chu Bin 
Published: July 2023

Abstract
Lumbar interbody fusion cage has been widely used in the treatment of various clinical lumbar diseases, and the mechanical properties of the lumbar interbody fusion apparatus are very important to the initial stability after implantation. According to the development trend of interbody fusion cages, this work designed three bullet-type interbody fusion cages, which are window-type, windowless and fenestrated type. Three groups of experimental samples were formed by using TC4 titanium alloy material and an SLM forming process (laser power 170 W, scanning speed 1150 mm/s). After post-processing, the mechanical properties of the three different structures were compared and analyzed through static and dynamic fatigue experiments. The tissue defects before and after the fatigue test were observed by CT. It was concluded that the fenestrated interbody fusion cage has better comprehensive mechanical properties and is relatively safer.
High Temperature Oxidation Behavior of 439 Ferritic Stainless Steel at Different Temperatures
Authors: Zhu EN , Xia Dianxiu , Han Qing , Chen Peidun , Wang Xuelin , Liu Zhiheng , Jiang Kun 
Published: July 2023

Abstract
In recent years, due to the installation of selective catalytic reduction (Selective Catalytic Reduction, hereinafter referred to as SCR) devices, high temperature oxidation failure has occurred frequently in automobile exhaust systems. To explore its high temperature failure mechanism, this paper takes 439 ferritic stainless steel which is often used in automobile exhaust pipes as an example and uses XRD, SEM, and EDS experimental methods to study its oxidation behavior at 700 °C, 800 °C and 900 °C. The results show that the oxide layer becomes thicker and the failure degree increases with the increase of the working temperature of 439 stainless steel. The oxidation products at different temperatures are different. When the oxidation temperature is 700 °C, the phase structure of the oxide layer on the surface of the sample is Cr2O3 and Fe2O3, and the oxide layer is dense and uniform. As the temperature rises to 800 °C, the surface oxidation products are sintered together, and the needle-like Fe2O3 structure appears on the oxide film. When the oxidation temperature rises to 900 °C, the oxide layer appears inner and outer layers, the outer layer is Fe2O3 shell structure, the inner layer is generated FeO, Fe2O3, and other iron oxides, and oxidation is very serious. At the junction of the oxide layer and the substrate, there are particles such as SiO2, TiO2, Fe2Nb in the substrate, which has a positive effect on the high temperature oxidation.