bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the effect of enhanced magnesium and copper contents on microstructure and property of Al-Zn-Mg-Cu alloys with high zinc element content during fabrication processes
Authors: Zhou Hua , Wen Kai , Yin He , Yu Ming-yang , Shi Guo-hui 
Published: August 2023

Abstract
Magnesium and copper elements can significantly influence precipitation characteristics, and furtherly change the property of final products in Al-Zn-Mg-Cu alloys. The current work chose a high Zn-containing Al-Zn-Mg-Cu alloy with synchronously enhanced magnesium and copper contents. Related microstructure and property were thoroughly investigated during the preparation process. The results showed that the solidification phase in as-cast microstructures was mainly AlZnMgCu. At the same time, the amount of it was enhanced with the increased content of magnesium and copper elements. After homogenization by 400°C/10h+472°C/56h, the eutectic ones dissolved into the α(Al), and only a sporadically distributed Fe-rich phase was observed. Mg(Zn, Cu, Al)2 phases with dense distribution and small size existed in extruded microstructure, most of them were re-dissolved in the α(Al) by solution treated with a regime of 472°C/4h. After single aged by 120°C/24h, the strength possessed an incremental trend with the increased content of magnesium and copper elements, while the elongation and electrical conductivity showed an opposite trend. MMC alloy possessed the largest fracture toughness value. When the alloys were aged by double-stage regimes, the strength, and electrical conductivity had incremental trends, while elongation possessed a decremental trend, as same as the single-aging ones.
The effects of Co percent on structure and electrochemical properties of LiNixMnyCo1-x-yO2 cathodes
Authors: Bai Xue , He Rui , Wei Aijia , Ji Yangfan , Zhang Lihui , Liu Zhenfa 
Published: August 2023

Abstract
The stretched supply and high cost of cobalt harm commercial Lithium-ion batteries production and manufacturing, and the fundamental understanding of the influences of Co percent on the structure and electrochemical performance of LiNixMnyCo1-x-yO2 cathodes is lacking. Therefore, hydrothermal and high-temperature solid-phase methods prepared the LiNixMnyCo1-x-yO2 cathodes with different Co content. The basic properties of materials, such as crystal structure and overall morphology, are studied in detail using common XRD diffraction and scanning electron microscopy techniques. Meanwhile, the electrochemical performance was tested by a battery-testing workstation. For different Co content, all LiNixMnyCo1-x-yO2 cathodes present an intact layered structure with R-3m space group and exhibit acceptable reversible discharge specific capacities. The cathodes deliver higher initial discharge-specific capacity when the Co content is 0.08. The LiNi0.92Co0.08Mn0.1O2 presents higher discharge capacities of 191.8, 182.6, 167.3, 157.9, 143.8, and 116.6 mAh g−1 at different rates from 0.2 to 10 C, respectively. The electrochemical performance analysis results indicate that the LiNi0.92Co0.08Mn0.1O2 cathode exhibits better rate capacities and cycle performance before the 200 cycles.
Preparation and Properties of New Starch-based Ceramic Body Reinforcing Agent
Authors: Nie Yufan , Li Yinger , Fan Bo , Qi Tao , Lu Ke , Liu Hongbo , Wang Ying 
Published: August 2023

Abstract
In ceramic production, the finished product is often fragile and defective due to low green strength, which greatly affects the ceramic yield and the preparation of advanced ceramics. It is important to develop a ceramic body reinforcement agent with an obvious reinforcement effect, no impact on slurry properties, low cost, and simple preparation process. In order to solve the above problems and analyze the influence of modification conditions on the green body enhancement results, the properties of three common starches were compared and corn starch was modified by substitution method to prepare a novel starch-based ceramic green body enhancer. The structural characterization and enhancement effect of the modified corn starch prepared by infrared spectroscopy and X-ray diffraction analysis showed that the addition of starch-based ceramic green body enhancer made the green body enhancement rate reach 61% and the mildew resistance increase for more than 4 days. The best preparation conditions for modified starch were soluble corn starch 33.3 g, 85% ethanol solution 300 mL, sodium hydroxide 16.46 g, chloroacetic acid 26.6 g, and reaction at 40 °C for 2.5 h.
Contour-Line Optimization and Performance Analysis of Yin-Yang Rotor in Twin-Screw Compressor
Authors: Chen Changsheng , Zhou Yalan , Wang Yuewu , Chen Biwen , Bian Jiahui , Wo Yang 
Published: August 2023

Abstract
To investigate the influence of the profile design of the Yin and Yang rotor on the performance of the twin-screw compressor such as outlet flow, exhaust pressure and turbulence intensity. In this paper, the Yin and Yang rotor profile optimization is carried out based on a type of twin-screw compressor, and the optimization profile and the original profile are numerically simulated, and the performance curves of the two groups of profile parameters are obtained. The results show that the optimized profile has better performance parameters under the same flow condition, that is, it is more stable in operation and has better vibration and noise index in operation.
A study on the variation of mechanical properties of Ti-8Al-1Mo-1V titanium alloy after electro-shocking treatment
Authors: Yao Yupeng , Zhou Jian , Zhao Hongjie 
Published: August 2023

Abstract
The electro-shocking treatment (EST) was a rising method for the strengthening of titanium alloys. This work conducted EST on Ti-8Al-1Mo-1V titanium alloy specimens with the purpose to shed insights on the influence of EST on the properties of the alloy. The results indicated that the number of the pulse current increased, the properties of the Ti-8Al-1Mo-1V titanium alloy were notably improved, and the fracture mode varied from ductile fracture to a mixed fracture mode of brittle and ductile.
Study on the effect of aging treatment on the mechanical properties of the die-forged Al-Cu-Mg-Ag heat-resistant alloy
Authors: Chen Lifang , Zhu Kai , Liu Qilong , Lin Haitao , Wang Zhengan , Liu Hongwei 
Published: August 2023

Abstract
In this research, the microstructure of large industrial Al-Cu-Mg-Ag alloy die-forgings at key load-bearing locations was examined using optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and electron back-scattered diffraction (EBSD). Also, the impact of various age treatment methods on the mechanical characteristics of die-forged Al-Cu-Mg-Ag alloys was investigated. The findings indicate that deformed grains predominate in this alloy’s grain type at this site. The microstructure of the alloy exhibits distinct forging flow lines, according to the results of color metallographic characterization. In the direction of matrix deformation, the alloy’s second-phase particle distribution is streamlined. The peak aging time of the alloy gradually shortens as the temperature of the aging treatment rises. The mechanical characteristics of the alloy first show a rising trend at various aging treatment temperatures, followed by a steady fall as the aging duration is extended. For this forged aluminum alloy, optimization suggests that the ideal single-stage aging heat treatment regime is 165°C/20h.
Powder Preparation by Vacuum Atomization and 3D Printing Forming Performance of 316 Stainless Steel
Authors: Zhang Fenglong , Wang Shiyi , Yang Yu , Zhang Kexin , Li Zhenlong , Wei Zhaozhao , Li Likun 
Published: August 2023

Abstract
This work describes the process of preparing 316 L stainless steel powder by vacuum atomization, then a 3D print sample of 316 L stainless steel is prepared by selective laser melting (SLM) experiments. Over 77% of the powder particle size distribution ranges from 15 to 45 μm. The prepared sample shows a smooth surface with few satellite globules and high sphericity with the 4.5 Mpa atomization pressure. Under these atomization pressure conditions, the tensile strength can reach 798 Mpa and the elongation up to 32.3%. This work demonstrated that 3D printing metal materials with high tensile strength and good plasticity could be obtained under appropriate atomization pressure conditions.
Design of self-healing carbon-based hydrogels for wearable motion monitoring
Authors: Li Wen , Zhu Congcong , Wang Ping , Tao Luqi 
Published: August 2023

Abstract
Conductive hydrogels have been extensively exploited in wearable medical monitoring, intelligent robotics, and human-machine interaction. Here, we construct an interpenetrating network of self-healing hydrogel using gelatine-modified carbon nanotubes (G/C) and polyvinyl alcohol (PVA) polymerization chains (given as PGC). A bonding agent, borax, was chemically cross-linked with PVA molecular chains to impart self-healing ability. The addition of G/C enhances the tensile behavior and conductivity of the hydrogels. With superior sensing capability and favorable biocompatibility, the PGC hydrogel described in this study offers valuable insights for developing ideal wearable strain sensors.
Research on the gel casting process and flexural strength of high-stability alumina ceramics
Authors: Deng Zhe , Liu Rong 
Published: August 2023

Abstract
Gel casting is an advanced wet-forming method for ceramics. In this paper, Isoabm 104 is selected as the dispersant and gelation agent for gel casting. The optimization of gel casting slurry and the preparation of the green and sintered alumina bodies are investigated. TAC reduces the viscosity of the slurry significantly due to electrostatic interaction. Isopropanol alcohol and vacuum tank eliminates the slurry’s air bubbles, thus improving the density of green bodies. A staged drying process is necessary to produce smooth and defect-free green bodies. After optimization of the slurry formulation and gel casting process, alumina ceramics with a Weibull modulus of 11.1 are successfully prepared.
Synthesis and properties of novel drug-loaded nano micelles based on Jerusalem Artichoke polysaccharides.
Authors: Gao Ying , Qi Weiguo , Song Zifan , Zhang Ningning , Yang Yang , Song Yimin 
Published: August 2023

Abstract
To develop a novel polymeric nano micelle drug delivery system, JAP-based drug-loaded nano micelles (FFC/JAP-HA) were prepared by chemical modification/ultrasound/molecular self-assembly method. The results showed that JAP was connected with hyaluronic acid (HA) by an ester bond, the particle sizes of FFC/JAP-HA were 329.8 ± 2.3 nm, and the critical micelle concentration (CMC) of FFC/JAP-HA was 3.3 × 10−2 mg/mL. The hemolysis results, cytotoxicity test results, and histological results also showed that the FFC/JAP-HA had good biocompatibility. Furthermore, pharmacokinetic results suggested that the retention time (MRTINF_obs) of FFC/JAP-HA could be extended to 918.23 ± 37.25 min, which laid a foundation for the development of a new polymeric nano micelle drug loading system.
Programmable Multi-stable Structure Based on Cosine Beam
Authors: Wang Xin , Chen Zhuo , Yang Ao Hao , Zhou Deng Yu 
Published: August 2023

Abstract
Mechanical metamaterials with multi-stable properties are an emerging field of interest. In this paper, we present a novel 3D bi-stable cell element with negative stiffness characteristics designed based on a cosine-curved beam. Static compression simulations were performed for the single-cell model and the series model. Using “E” and “F” states as programming units, five array models were designed to analyze the stiffness variation rules. Dynamic simulations were conducted to compare the energy absorption rate and collision force of the model with variable stiffness. The conclusion shows that the structure has multi-stable and negative stiffness characteristics, and its stiffness can be adjusted in the range of 113.0 to 197.6 N/mm. Additionally, the energy absorption rate can be adjusted in the range of 8% to 65%. This study has made the structure configurable after manufacturing, breaking through the application limitations of predefined objects, and broadening its application prospects.
Thermal stability of epoxy-based Sn-58Bi solder joint
Authors: Li Xiao-guang , Yang Xiao-jun , Ma Limin , He Ding-yong 
Published: August 2023

Abstract
The epoxy(EP)-based Sn-58Bi solder paste consists of a curable flux and Sn-58Bi particles. In addition to its function as a flux, the curable flux forms a cured shell on the periphery of the solder joint. Under appropriate process parameters, the EP-based Sn-58Bi solder paste can form solder joints with a shell-core structure on the Cu substrate. Compared to conventional Sn-58Bi solder paste, the solder joint of EP-based Sn-58Bi solder paste has a higher heat resistance and joint strength. To investigate the heat resistance of the solder joint of EP-based Sn-58Bi solder paste, the thermal cycle test was carried out in the temperature range of 130-170°C. Metallographic microscopy and scanning electron microscopy (SEM) were used to observe the interfacial microstructure of the solder joints and to analyze the difference in the microstructure of the solder joints in relation to the thermal history. The results show that the solder joint interface of the EP-based Sn-58Bi solder paste is more stable than that of the conventional Sn-58Bi solder paste, indicating that the cured EP shell on the periphery of the solder joint can effectively improve the thermal stability of the solder joint.
Design of a constitutive model based on the evolution of creep cavities damage for 9Cr-1Mo steel
Authors: Cheng Huaxing , Yan Yabin 
Published: August 2023

Abstract
Considering the impact creep cavity evolution damage of 9Cr-1Mo steel, a new creep constitutive model was established based on the damage-coupled Norton equation and the strain hardening term in the theta projection method model, and the parameters were solved by optimization technique. The creep behavior was compared with that of the Kachanov-Robotnov model. According to the simulation results, the proposed constitutive model can represent the strengthening phenomenon during the first creep stage of 9Cr-1Mo steel. It provides a more accurate description of the behavior during the three creep periods.
Application of the Substructure Method in Direct Calculation of Hull Structures
Authors: Wang Xiaoqiang , Li Jiahao , Zhang Zhenhai 
Published: August 2023

Abstract
To study the application of the substructure method in the direct calculation of ship hull structures, this paper uses MSC. PATRAN software for modeling. Based on the full ship model, the structure components corresponding to the units before the tail structure are deleted to form a finite element submodel that only contains the tail structure. The constraints and various design loads under each working condition are retained on the units of the tail section model. The node displacement at the “boundary” of the submodel obtained from the full ship model is used as its constraint condition to study the correctness and applicability of the finite element analysis of the tail section structure based on full ship FEA (Finite Element Analysis). Comparing the deformation and stress results of the stern of the main hull obtained from the full ship model and the tail section model, it is shown that the substructure method is correct and feasible.
Construction of the visco-elastic constitutive model for polyethylene terephthalate in a rubbery state
Authors: Yin Zhansong , Zeng Lianghua , Peng Engao 
Published: August 2023

Abstract
Polyethylene terephthalate (PET) is an important commercial engineering polyester thermoplastic used in beverage bottles. PET is usually biaxial stretched above its glass transition temperature (T
g
) and molded into containers by injection stretch blow molding (ISBM) under a rubbery state. This paper constructs a visco-elastic constitutive model for PET above T
g
. The stress-strain behaviors of PET can be explained by the Eyring activation mechanism and the Arruda-Boyce eight-chain rubber model(A-B model). In the constitutive model, the overall stress of PET is equivalent to the sum of Eyring dashpot and A-B model stresses. The uniaxial tensile test data confirms the constitutive model under three stretch rates and temperatures. The constitutive model can furtherly be applied in the numerical simulation of the PET ISBM process.
Design of a Fatigue Analysis Method for Adhesive Bonding in Wind Turbine Blades Considering Multiple Uncertainties
Authors: Liu Haodong , He Zhenfeng , Li Yongjie , Liu Zheng 
Published: August 2023

Abstract
Adhesive bonding is widely distributed in wind turbine blades, and the fatigue performance analysis of the bonded layer is critical to investigate the safety and reliability of the whole structure. Various uncertainties influence the fatigue performance of adhesive bonding, originating from material, load, etc. A method for simulating fatigue that considers multiple uncertainties has been proposed in this paper based on the Cohesive Zone Model (CZM) and stochastic finite element theory. The study can provide reliable results for fatigue performance investigation of adhesive bonding in wind turbine blades.
Study on the effect of annealing and solution treatment on the peripheral coarse grain of 2195 alloy
Authors: Wang Tao , Wen Kai , Lin Ben , Li Yanan , Xiong Baiqing 
Published: August 2023

Abstract
In the actual production process, some aluminum alloys need to go through annealing heat treatment followed by solution treatment; this paper explores the evolution of peripheral coarse grain (PCG) structure during annealing and solution treatment by metallographic observation and electron back-scattered diffraction (EBSD) of materials in the extruded state, after different annealing heat treatments and different solution treatments. It was found that recrystallization occurred in the surface layer of the material during the extrusion process, and the recrystallized grains developed into PCG during the solution process. The PCG was smaller when the annealing temperature was too low, or the solution temperature was too high, but the PCG structure was thicker. The annealing time had no significant effect on the PCG structure. The coarse grains appeared first at the edge of the material and then engulfed each other to develop into several huge grains.
Effect of pulling speed on directional solidification structure of the single crystal blade
Authors: Zhao Xiao Yun , Cao Guo Qiang 
Published: August 2023

Abstract
In this paper, the influence of withdraw speed on the directional solidification structure of the single crystal blade was studied. The influence of 2.7 mm/min, 5.4 mm/min, and 9.5 mm/min drawing speed on temperature field, temperature gradient, and microstructure were analyzed. The results show that as the casting speed increases, the temperature gradient G decreases, the degree of downward depression of the temperature field also increases, and more stray grains appear at the single crystal blade platform. In addition, it is also found that the increase in the withdrawal speed helps to reduce the secondary dendrite arm spacing and refine the grains. This paper provides a theoretical basis for optimizing the directional solidification process of single crystal blades.
Study on the influence of pre-stretching degree on the strength and microstructure evolution of an Al-Cu-Li alloy
Authors: Li Changlin , Zhang Yongan , Xun Chenyang , Zhu Kai , Chen Pengcheng 
Published: August 2023

Abstract
Al-Li alloys can be strengthened by pre-stretching before artificial aging to promote the precipitation of the strengthened phase. This study investigates the mechanical properties and evolution of a 2 mm thick Al-Cu-Li alloy sheet’s microstructure with various pre-stretching degrees. From the results, as the degree of pre-stretching is increased, the strength gradually increases. Particularly noticeable is the upward trend in yield strength. By the pre-stretching volume of 4%, tensile strength can be enhanced by 95 MPa and yield strength by 187 MPa. Pre-stretching leads to a gradual reduction in precipitation of θ′, an increase in T1 phase number density but a reduction in T1 phase diameter. Meanwhile, a combination of strain-hardening and precipitation-strengthening determines the yield strength. Increasing the pre-stretching degree increases strain-hardening, while T1 phase strengthening decreases gradually.
Design of a Mobile Manipulator for Curtain Wall Installation
Authors: Gao Zhenzhou , Li Yang , Zhu Xiaoliu , Xiao Ming , Liu Hui , Wei Bo 
Published: August 2023

Abstract
The installation of the high-altitude curtain wall is mainly completed manually with simple mechanical assistance. The construction process is characterized by high labor intensity, high risk, low efficiency and low quality. To improve the automation and intelligence of curtain wall installation, improve construction efficiency and reduce labor intensity, a mobile manipulator for curtain wall installation is developed. Firstly, the curtain wall installation process is analyzed. Secondly, kinematics modeling is established, and the forward and inverse kinematics are analyzed and solved. Finally, the experiment is carried out to complete the tasks of grasping, rolling over and transporting stone, glass, ALC plate and other dense and semi-dense materials.
Preparation process optimization and characterization of Litinan-based drug delivery system
Authors: Yang Yang , Song Zifan , Qi Weiguo , Zhang Ningning , Gao Ying , Song Yimin 
Published: August 2023

Abstract
Adriamycin is an antitumor antibiotic, but its systemic side effects and large adverse effects in clinical application limit its wide application. In this study, we prepared Lentinan-oleic acid polymers by esterification reaction and optimized their preparation process by response surface methodology. ADM/LNT-OA micelles were prepared by self-assembly to alleviate the side effects associated with drug administration. The morphology and performance measurements of ADM/LNT-OA were investigated by particle size potentiometry, fluorescence spectroscopy, scanning electron microscopy, and transmission electron microscopy. The results showed that the reaction between Lentinan and oleic acid at pH 7 for 16 h at 25 °C was the best preparation condition for LNT-OA, and the degree of substitution of Lentinan could reach 53.6% with 97.5% yield. The ADM/LNT-OA micelles were spherical micelles of 164.2±11.4 nm with a potential of -30.9±1.5 mV, and their critical micelle concentration was 0.063 mg. In summary, our results suggest that the ADM/LNT-OA drug delivery system provides a basis for improving the efficacy and reducing the toxic side effects of the antitumor drug ADM.
Research on the Synchronization Theory of the Vibration System of Four Circularly Symmetrical Vibrator
Authors: Zhang Nan , Zhang Sheng , Jia Yijun 
Published: August 2023

Abstract
This dissertation aims to study the synchronization properties of a vibrating system consisting of four oscillators, with three located equidistantly on the same circular trajectory and the fourth exciter situated at the center. This study is divided into three stages. Firstly, by utilizing the Lagrange equation, the dynamic model is developed for the research object, and the differential equation is derived when the body runs stable. Secondly, the differential equation obtained in the previous step is solved using Hamiltonian theory, and the solution of the equation is obtained. The necessary conditions required for the vibration system to achieve stable synchronization are also deduced. Finally, the accuracy of the synchronization characteristics is verified by using simulation techniques. The findings indicate that with specific prerequisites met, four motors can achieve synchronicity while the vibration system maintains stability and elliptical motion of the system centroid. These research outcomes establish a theoretical basis for the development of similar vibrational equipment.