bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of Deformation Rate on Nucleation and Growth of Recrystallized Grains during Hot Deformation of Nickel-Based Powder Superalloys
Authors: Lin Yingying , Fang Shuang , Dong Qi , Jiang Tao , Ma Xingyu 
Published: April 2023

Abstract
High temperature uniaxial compression deformation test was carried out on nickel-based powder superalloy FGH96 alloy by thermal processing simulation test machine, and the relationship between grain boundary characteristics and nucleation mechanism of recrystallized grains, growth characteristics of recrystallized cores and related dynamic softening mechanisms was studied. According to the correlation and evolution law of grains, combined with the change trend of grain orientation during the deformation process, the recrystallization behavior characteristics of the grains with special orientation generated during the deformation process were analyzed. When the deformation temperature is 1070 °C, the evolution rules of the substructure grain boundaries with an orientation difference of less than 10° are different under different deformation rate conditions, which indicates that the dynamic softening mechanism of FGH96 alloy is slightly different with the increase of deformation rate. There are different. With the increase of the deformation rate, the nucleation mechanism induced by Σ3 twinning gradually replaced the nucleation mechanism of continuous subgrain rotation and coarsening, and the grain growth rate gradually slowed down.
Effect of Full Baking on Carbon Measurement by High Frequency Induction Combustion Infrared Absorption Method
Authors: Wei Jianhuan , Xu Hui , Jiang Haixiao , Wu Yujie 
Published: April 2023

Abstract
In this study, the sample and multicomponent flux are put into the crucible and fully baked. The color change of multicomponent flux during baking indicates the degree of baking, which is appropriate when multicomponent flux turns light red. Through specific tests, different grades of superalloys are used to carry out the comparison test between full baking and non-baking. The measurement precision after full baking is generally higher than that without baking. The difference in value cannot be predicted. Also, the difference cannot be eliminated by adding a correction factor, it can only be eliminated by full baking. After full baking, it can be seen quantitatively from the blank influence value that the blank has little interference with the measurement of low carbon, and the influence on the measurement of high carbon is negligible.
Effects of Organic Additives on the Properties of Boronsilicate Glass/Al2O3 Composites Tape Casting Slurries and Green Tapes
Authors: Yu Zhihong , Lin Xiaoxia , Wei Pengfei 
Published: April 2023

Abstract
Tape casting was a new type of low temperature co-fired ceramic (LTCC) forming process, the key to which was the formation of slurry. Suspensions consisting of boronsilicate glass/Al2O3 powders and organic solvent system were studied, in addition, the effect of solid content and mixing time on the property were also investigated. The results indicated that the optimized parameters of the slurry are 55 wt. % boronsilicate glass/Al2O3 composites powders, the three azeotropic solvents (Ethanol/ Dimethylbenzene/ Dimethylcarbinol=30 wt.%: 10 wt.%: 60 wt.%), 3.0 wt.% dispersant, the ratio of plasticizer to binder(R=0.65), and mixing time (20 hours). The green tape had smooth and homogeneous surfaces without cracks, and the sintered sample had a high relative density.
Effect of N-doping on Structure and Properties of 3R-CuInO2 Oxide by First-principles Study
Authors: Zhang Xiaojian , Liu Wenting , Li Yangping 
Published: April 2023

Abstract
The structural, electronic and mechanical properties of N-doped 3R-CuInO2 were investigated by using the first-principles theory. The lattice constants and internal parameter of 3R-CuInO2 were calculated and the effects of N-doping on the structural parameters were also studied. And the electronic properties of pure and doped 3R-CuInO2 were studied throughout the calculation of band structure and density of states. Moreover, the elastic coefficients, bulk modulus, shear modulus, Young’s modulus and Poisson’s ratio of pure and doped 3R-CuInO2 with different concentration of N atoms were also investigated.
Aging and Heat-treatment of Room-temperature Hydrogen Sensitive Pt-WO3 Composite Nanoceramics
Authors: Lu Xilai , Huang Yong , Wu Menghan , Chen Wanping 
Published: April 2023

Abstract
Pt-WO3 composite nanoceramic produced by pressed and sintered with 5 wt% Pt and WO3 nanoparticles has a response multiple of about 80 for 800 ppm H2-20% O2-N2 and a response multiple of about 10 for 100 ppm H2-20% O2-N2 at room temperature of 40 relative humidity(RH), showing an impressive sensing capacity for low concentration hydrogen. However, Pt-WO3 composite nanoceramic will show the aging phenomenon mainly with the rapid decline of recovery rate in the open air, which limits its application in practical equipment. Fortunately, Pt-WO3 composite nanoceramic can be reactivated by heat treatment at 200°C for 1 h, thus restoring its pre-aging hydrogen sensitivity capacity. This may be because heat treatment refixed some weak-bonds Pt particles to the original site.
Characterization of TC4 Alloy Powder Prepared by EIGA for Laser 3D Printing
Authors: Chen Jialu , Zhang Lei , An Ran 
Published: April 2023

Abstract
Spherical TC4 alloy powder for laser 3D printing have been prepared by the vacuum rotary electrode gas atomization(EIGA), and the characteristics such as particle size distribution, chemical composition, sphericity, phase, hollow sphere ratio, apparent density and flowability of spherical TC4 alloy powder were studied. The results show that the TC4 alloy powder with ideal characteristics was successfully prepared under the optimized process parameters, the morphology of the powder is mainly spherical and its sphericity reaches 98%, the phase is composed of α′-Ti single solid solution, the main particle size distribution is 1~150 μm, and the hollow sphere rate is 3%. The chemical composition of the TC4 alloy powder meets the requirements of industrial standards and the TC4 alloy powder has low oxygen content of 0.106%.The apparent density of alloy powder with 54~150 µm is 2.648 g/cm3, and the flowability is 25.7 s/50g. The characteristics of the TC4 alloy powder prepared by this EIGA method meet the requirements of laser 3D printing high-quality TC4 alloy.
Design and Strength Analysis of Feeding Guide Track Suitable for Long Tower Transportation
Authors: Wang Fei , Liu Chen , Huang Yongzhong , Qin Jian , Li Lianmao 
Published: April 2023

Abstract
Aiming at the problems of difficult transportation of long tower and high turning requirements in material ropeway of transmission line, the design schemes of two kinds of feeding guide tracks, bifurcated guide track and two-track guide track, are proposed, and the feeding guide track realizes the transportation of long tower. The difficulty of manufacturing and transportation of the track in the two schemes is compared, as well as the accuracy of installation, and finally the two-track guide track design scheme is selected. The strength of the track is analyzed by finite element method, and the type and material parameters of the feeding guide track satisfying the design requirement are obtained. The type of the track is the hot-rolled light track 9kg/m, and the material is the steel with the grade of 50Q or 45SiMnP. The purpose of this study is to provide new ideas and directions for solving the construction feeding problem of large materials transported by material ropeway of transmission line in complex terrain.
Numerical Investigation on Enhanced Heat Transfer with Tilted Hypervapotron Structure of the Fusion Blanket
Authors: Gao Jun , Ji Junyu , He Shengnan , Wang Weihua , Chu Delin 
Published: April 2023

Abstract
High flux components in fusion reactor are designed to transfer high thermal loads from the core plasma under steady-state operation and emergency conditions. In order to improve the heat transfer ability, hypervapotron structure is proposed to promote the heat transfer performance by optimizing the thermal hydraulic design. In this paper, three-dimensional numerical simulation was carried out using CFD methods for the improved solution of the first wall. The results show that the heat transfer performance of the triangular fin structure with tilt angle of 30° is superior to 0 °, 15°and 45°. At a typical flow rate of 2 m/s, the heat transfer efficiency of the triangular fin with tilt angle of 30° improved by a maximum of 118.1% compared with that of the smooth flow channel. In addition, the heat transfer performance of the triangular fin structure is better than other fin structure, and its maximum temperature drops by 136.3K compared to the smooth flow channel. The design solution may provide a viable new method for efficient cooling of future fusion reactor components with high heat flux.
A FBS Approach to Designing Monitoring System in Nuclear Power Plant
Authors: Shen Chao , Wang Yan , Chen Yu , Wu Gang 
Published: April 2023

Abstract
The design framework of human-machine interface (HMI) provides guiding principles for the display of digital information on the system interface. In order to solve the problem of human error caused by the unreasonable design of information interaction interface of complex system, this paper takes the feedwater flow control system (ARE) of nuclear power plant as an example to optimize . The design of the human-machine interface of the system is based on the framework of function behavior state (FBS), defines the mapping relationship between various levels of the system interface, defines the information requirements of the monitoring system interface and presents the information according to the cognitive decision-making theory, and improves it on the basis of the original interface. The purpose of this research is to make the monitoring interface more consistent with the mental model of the operator and reduce the cognitive workload and error probability, so as to ensure the safe and reliable operation of the nuclear power plant. This research also provides some reference for the optimal design of the HMI of the monitoring system of the nuclear power plant in the future.
Research on Data Cleaning Method of Metal Material Corrosion Fatigue Test Data
Authors: Li Ruitao , Lv Shengli 
Published: April 2023

Abstract
When conducting corrosion fatigue tests on metal materials, it is found that the test results obtained or the process of manually sorting out these experimental data sometimes produce some abnormal data that are obviously different from other data. These abnormal data have a great impact on data processing and analysis, and also cause certain difficulties in the systematic management of experimental data.Therefore, in the process of developing the data management system for corrosion fatigue experiments, a module for calculating the screening of abnormal data in metal material test data was designed.The module is written in java language, which can effectively filter out abnormal values from the test data in the uploaded excel table, and calculate the average value, variance and other data according to the demand.Finally, the function of the system and the accuracy of its calculation are verified with the actual test data.The test results show that:The system is simple and convenient to use, with high calculation accuracy, which can effectively remove abnormal data and improve the staff’s processing efficiency of test data;At the same time, the system can also be used to clear the abnormal data of other test data of materials.
Reactive ion Etching of SiO2 and Mo Sidewall Profile Process
Authors: Shi Dingqi , He Jing , Zhou Zhen , Huang Chuyun 
Published: April 2023

Abstract
This paper investigates the process parameters affecting the sidewall angle of Mo and SiO2 films based on the reactive ion etching (RIE) system, firstly, the photoresist mask with a certain sidewall angle was obtained by adjusting the hardening temperature and hardening time of the photoresist during the lithography process, and their effects on the sidewall angle of the photoresist mask were investigated. In the RIE etching of SiO2 and Mo, the etching gas type (CHF3, CF4, SF6), O2 flow rate, and their effects on the sidewall angle of SiO2 were adjusted to obtain the sidewall angle of SiO2 in the range of 15°~53°, During the RIE etching of Mo, the RF power, SF6 flow rate, and O2 flow rate were adjusted and their effects on the Mo sidewall angle were investigated, resulting in a range of 17.3° to 30.2° for the Mo sidewall angle. This is useful for the study of the thin film body acoustic resonator (FBAR) process.
Research on Construction Monitoring Technology of Stringing Block of Transmission Line
Authors: Nie Qiong , Qin Jian , Wang Fei , Liu Chen , Qiao Liang 
Published: April 2023

Abstract
In view of the monitoring and analysis requirements of the stringing block in the process of tension stringing construction, multi-parameter sensing monitoring units such as spatial attitude and load are used to realize real-time collection and transmission of multi-parameter data such as the three-axis attitude angle, the spatial position and load information of the stringing block. The calculation method of the spatial attitude angle of the stringing block is proposed, which can obtain the calculation results of the stringing block load and the change of the space attitude angle through the running state of the traction rope and wire at different stages, and realize the monitoring of the construction process.
Outgassing Characteristics of Ceramic Shell Material and Microchannel Plates of Third-Generation Low-Light-Level Image Intensifiers
Authors: Guo Xin , Pang Yan , Deng Ningkang , Yuan Yuan , Hu Wenbo , Bu Renan , Dong Meng , Chen Lian 
Published: April 2023

Abstract
Vacuum failure is a major cause of shortening the lifetime (especially storage lifetime) of low-light-level image intensifiers. In order to deeply understand the vacuum failure mechanism of image intensifiers, the gas releasing rates and compositions of ceramic shell material (95 alumina ceramic) and microchannel plates (MCPs) of third-generation low-light-level image intensifiers were measured with the static pressure-rising method and residual gas analysis by a quadrupole mass spectrometer. The experimental results show that the outgassing rate of the 95 alumina ceramic at 150 °C is about one order of magnitude higher than that at 23 °C, while the outgassing rate of the MCPs at 150 °C is only about half an order of magnitude higher than that at 23 °C, which is caused by a large number of microchannels in the MCPs. During the static accumulation of gas releasing, the outgassing rate of the 95 alumina ceramic first increases and then tend to stabilize at 23 °C, and it remains basically unchanged at 150 °C, while for the MCPs both the outgassing rates at these two temperatures increase gradually, and the outgassing rate at the higher temperature increased relatively slowly. The main gas components released from the 95 alumina ceramic and MCPs at 23 °C include H2O, H2, N2/CO and CO2. After the vacuum baking at 150 °C, the releasing ratio of H2O gas from the 95 alumina ceramic decreased greatly, and that of H2 gas increased dramatically, while the releasing ratio of H2O gas from the MCPs decreased just slightly, which indicates that the vacuum baking degassing for the MCPs is relatively difficult.
Design of High-strength Material Non-dismantling Docking Assembly
Authors: Chai Shaolei , Wu Nianpeng , Bai Yu , Shi Qiang , Wei Yong 
Published: April 2023

Abstract
The construction technology of tower erection by segments with the cranes on the basis of the docking assembly has been applied in multiple cities and provinces in China. The docking assembly reduces the number of hoisting times, and lowers the safety hazards. However, the docking assembly which is an independent structure and made of common materials currently needs to be installed on and dismantled from the tower for each use, and each component is heavy. To address the above problems, the high-strength material non-dismantling docking assembly is studied to develop a design scheme which reduces the weight and eliminates the installation and dismantling work of docking assembly. Its successful engineering application shows that the use of high-strength materials effectively reduces the weight of the docking assembly and the docking assembly developed is safe and reliable, which greatly improves the efficiency of tower erection and reduces labor intensity. The project study results provide a reference for the design of high-strength material non-dismantling docking assembly for other types of transmission towers in the construction of power grids.
Calculation Method of Lane Saturated Flow Rate Based on Asphalt Material
Authors: Liang Zijun , Zhan Xuejuan , Wang Ruihan , Li Yuqi 
Published: April 2023

Abstract
In order to improve the calculation accuracy and popularity of intersection lane saturated flow rate, we propose a calculation method of lane saturated flow ratebased on asphalt material. Firstly, environmentally friendly modified asphalt material is used to pave the intersection lanes to improve the smoothness and friction of the road surface.Then by millisecond level electric alarmvehicle data for measuring basis, using the small time interval method to extract thedata of green light saturated time interval.By K-means algorithm clustering analysis, the percentage of different time headway clusters after clustering is analyzed, and the average value of time headway of representatives group as saturated time headway, and the saturated flow rate in the measured period is further calculated.Finally, an example analysis is carried out on the vehicle data of Eshan Road and Huajin South Road in Wuhu City. The saturated flow rate calculated by the proposed method is 1478.68veh/h. Compared with the manual observation method, the relative error is less than 3%, which verified the accuracy and effectiveness of the proposed method.
Study on Structural Aging and Gas Leakage Failure Behavior of Electrofusion Socket of Buried Polyethylene Gas Pipes
Authors: Gao Guanling , Tian Xiaojiang , Luo Tao , Li Chao , Gao Jin 
Published: April 2023

Abstract
Based on two samples of gas leakage cases of the PE electrofusion socket for gas distribution systems within 22 and 25 years of service respectively, it was analyzed that the apparent performance and structural aging performance of electrofusion socket. The results suggested that it was happened to PE electrofusion socket of aging, decrease of thermo-oxidative stability and crystallinity, thus resulting in significant deterioration of structural performance in comparison to the pipe wall. In order to clarify the structural weakness of gas leakage, the failure analysis was carried out.
Field Measurements of Bridge Pier Scour in a Curved Channel
Authors: Li Ying , Pan Dongzi 
Published: April 2023

Abstract
Pier scour is the most common cause of bridge failures, so the problem for the erosion of soil surrounding a bridge foundation has attracted extensive attention. The Jiaxing-Shaoxing Bridge (JSB) is located in Jianshan bend of the Qiantang River Estuary (QRE). The special flow structure and bed morphology of the bend makes the scouring characteristics of the piers particularly complex. Based on the results of Multibeam Echosounders for topographic surveying in recent six years, the scouring characteristics of pier foundation of a main navigation channel of the JSB are analysed in this paper. The results show that with the implementation of the reclamation project in the QRE area, the river channel has been gradually narrowed, coupled with the sharp reduction of the sediment entering the sea of the Yangtze River, the river regime swing in the QRE has changed significantly compared with that in the original design stage of the JSB. Under adverse river regime hydrological conditions, the riverbed erosional depth near the bridge is remarkable, and the local scouring depth of the pier is superimposed, which significantly will reduce the minimum elevation of the bed around the pier.
Effect of Low-intensity Ultrasound on Cd Tolerance of Partial Nitrification Sludge
Authors: Chen Peiwen , Zhu Yichun , Yang Jieyuan , Lai Yafen 
Published: April 2023

Abstract
Cadmium (Cd) is a typical nitrification inhibitor, which has a strong inhibitory effect on partial nitrification (PN). The discrepancy on Cd tolerance of PN sludge caused by low-intensity ultrasound (LIU) was studied. It suggested that the half inhibitory concentration (IC50) of sludge was increased from 24.51 to 29.07 mg/L by 35 days of ultrasonic treatment, and the Cd tolerance of sludge was enhanced. Further analysis indicated that contents of extracellular polymeric substances (EPS) rose substantially because of LIU, which played a catalytic role on increasing adsorption capacity of PN sludge for Cd.
Effects of Fly Ash Proportion on the Compressive Strength of the Fly Ash & Malan Loess Based Geopolymer Paste
Authors: Zhu Jiayuan , Gao Yuting , Wu Jie 
Published: April 2023

Abstract
This paper presents the results of an experimental investigation on the 7-day and 14-day compressive strength of the fly ash & Malan loess based geopolymer paste. The sodium hydroxide solution and sodium silicate solution are used as the alkali solutions. The mass proportion of fly ash varies from 0% to 100%. A total of 66 specimens were cast. The 7-day and 14-day compressive strength vs the mass proportion of fly ash were discussed. According to the development changes of the compressive strength and density, the feasibility of loess in replacing fly ash was discussed, the geopolymer paste curing measures and the optimum mass proportion of fly ash were recommended.
Study on the Vertical Vibration Comfort of Prefabricated Skyscraper Steel-Concrete Composite Industrial Plant
Authors: Lu Wanzhu , Shen Yang , Zhou Ruoyang , Zhou Shujing , Qu Ming , Chen Jianghua 
Published: April 2023

Abstract
Steel-concrete composite structure is widely used in the present skyscraper industrial plant. This type of structure has a lot of advantages, such as high structural strength, efficient construction etc. However, the stiffness of this composite structure is lower than that of steel structures or reinforced-concrete structure, especially in the skyscraper industrial plant. The skyscraper industrial plant has a large span and high floor height, which means that the vibration comfort issues must be considered. This paper takes the actual skyscraper industrial plant under construction as the background, adopts the two methods of field measurement and finite element simulation, to obtain the first order vertical self-vibration frequency value of the steel-concrete composite slabs. The results show that the value is within the allowable range of error.
Development Trends of Low-Carbon Technologies of Chinese Steel Industry to Achieve Carbon Peaking and Neutrality Goals
Authors: Wang Haifeng , Ping Xiaodong , Lu Lijin , Ju Dianchun 
Published: April 2023

Abstract
The specific CO2 emissions per tonne of steel have been significantly reduced in Chinese steel industry. The effects of Chinese steel industry on the carbon peaking and carbon neutrality goals were analyzed in this paper. A number of low-carbon solutions are proposed for carbon peaking and carbon neutrality goals in order to achieve the development targets.