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Preparation of B4C-ZrB2-SiC ternary eutectic composites by arc melting and their properties

Materials Research Innovations 2015年第Sup10期19卷 26-29页

作者： Tu, R. Li, N. Li, Q.Z. Zhang, S. Goto, T. Zhang, L.M. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China Institute for Materials Research Tohoku University Sendai980-8577 Japan

B4C-ZrB2-SiC composites were synthesised by arc melting in Ar atmosphere using B4C, ZrB2 and β-SiC powders as starting materials. The ternary eutectic composition of 40B4C-20ZrB2-40SiC (mol-%) was first identified and a lamellar eutectic texture was observed. SiC and ZrB2 grains about 1 μm in thickness were uniformly dispersed in B4C matrix of B4C-ZrB2-SiC eutectic composite. B4C (003) and ZrB2 (100) planes were perpendicular to the growth direction. The Vickers hardness of B4C-ZrB2-SiC ternary eutectic composite was 30-34 GPa. The fracture toughness of B4C-ZrB2-SiC composite increased with the decrease of B4C content and the rise of ZrB2 content. © 2015 W. S. Maney & Son Ltd.

关键词： Silicon carbide

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Hot deformation behavior and constitutive modeling of Q345E alloy steel under hot compression

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Journal of Central South University 2017年第2期24卷 284-295页

作者：钱东升彭亚亚邓加东 School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China School of Automotive Engineering Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan 430070 China State Key Laboratory of Materials Processing and Die & Mould Technology Wuhan 430070 China

Q345E as one of typical low alloy steels is widely used in manufacturing basic components in many fields because of its eminent formability under elevated temperature. In this work, the deformation behavior of Q345E steel was investigated by hot compression experiments on Gleeble-3500 thermo-mechanical simulator with the temperature ranging from 850 ℃ to 1150 ℃ and strain rate ranging from 0.01 s-1 to 10 s-1. The experimental results indicate that dynamic softening of Q345E benefits from increasing deformation temperature and decreasing strain rate. The mathematical relationship between dynamic softening degree and deformation conditions is established to predict the dynamic softening degree quantitatively, which is further proved by some optical microstructures of Q345E. In addition, the experimental results also reveal that the stress level decreases with increasing deformation temperature and decreasing strain rate. The constitutive equation for flow stress of Q345E is formulated by Arrihenius equation and the modified Zener-Hollomon parameter considering the compensation of both strain and strain rate. The flow stress values predicted by the constitutive equation agree well with the experimental values, realizing the accurate prediction of the flow stress of Q345E steel under hot deformation.

关键词： hot deformation behavior dynamic softening flow stress constitutive model

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Surface-strengthened thermal stable gradient nanostructured CSS-42L fabricated by ultrasonic shot peening and subsequent annealing

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Materials Today Communications 2025年 46卷

作者： Chao Song Guangchao Wang Xinhao Zhao Qingyou Han Fei Yin Hubei Longzhong Laboratory Xiangyang Hubei 441000 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China School of Automotive Engineering Wuhan University of Technology Wuhan 430070 China AECC Zhongchuan Transmission Machinery Co. Ltd. Changsha 410219 China School of Mechanical Engineering Southeast University Nanjing Jiangsu 210009 China

Grain refinement from the microscale to the nanoscale significantly enhances the performance of metals. Ensuring stable grain size and mechanical properties at high temperatures is critical for the production and utilization of nanomaterials. In this work, we fabricated average surface ferrite size of 33.9 nm gradient nanostructured CSS-42L using ultrasonic shot peening (USP). To investigate the stability of the nanocrystals at service temperature of 500 °C, the gradient heterogeneous nanostructured samples were annealed at temperatures ranging from 300 to 600 °C for 30 minutes, followed by exposure at 500 °C for one week. The results show that the average surface ferrite size stable at 38.4 nm after annealing at 400 °C, and it stabilized at 36.4 nm after one week of heat preservation, demonstrating the significant stability of the gradient nanostructure. Therefore, the optimal surface strengthening process for CSS-42L is USP-15 min+ AT-400 °C. Fundamental mechanisms of surface nanocrystallization and stable ferrite size are discussed based on both experimental and simulation results.

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Accurate simulation on the forming and failure processes of fiber metal laminates: A review

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International Journal of Lightweight Materials and Manufacture 2023年第3期6卷 344-356页

作者： Chen, Yizhe Yang, Yusen Wang, Zhuoqun Wang, Hui Li, Jun Hua, Lin Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China Jiangsu Xinyang New Material Co. Ltd. Yangzhou225000 China

Fiber metal laminates (FMLs) are a kind of composite material prepared by alternately arranging fiber layers and metal sheets at a certain temperature and pressure. It has been widely used in aerospace and automobile transportation for its excellent combined mechanical properties. For the forming and failure processes of FMLs, the interfacial behavior and damage evolution of components are hard to be observed experimentally. Therefore, it is of great importance to simulate them accurately. In this article, the development and application of FMLs were first introduced. Then the comparison of constitutive models in FMLs simulation was given, especially the dynamic constitutive model applied to the metal layer. After that, the important aspects of damage evolution, interface behavior, and model optimization in the simulation on the forming and failure process of FMLs were analyzed, and the emphasis is on the nonlinear progressive damage model of different materials, the construction of cohesive zone model and superior meshing methods. Furthermore, the experimental verifications of FMLs simulation were given. It is shown that the deformation behavior and damage characteristics of various kinds of FMLs during forming and failure processing can be accurately predicted by reasonable numerical simulation. Eventually, the future outlooks for numerical simulation of FMLs was proposed. Through this review, scholars and engineers who are interested in FMLs can systematically understand the numerical simulation work of FMLs, which is helpful in improving the quality of research in this field. © 2023 The Authors

关键词： Constitutive models

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Numerical simulation on dendritic growth of Al-Cu alloy under convection based on the cellular automaton lattice Boltzmann method

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Chinese Physics B 2022年第9期31卷 575-586页

作者： Kang-Wei Wang Meng-Wu Wu Bing-Hui Tian Shou-Mei Xiong School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

A numerical model is developed by coupling the cellular automaton(CA)method and the lattice Boltzmann method(LBM)to simulate the dendritic growth of Al-Cu alloy in both two and three *** improved decentered square algorithm is proposed to overcome the artificial anisotropy induced by the CA cells and to realize simulation of dendritic growth with arbitrary *** on the established CA-LBM model,effects of forced convection and gravity-driven natural convection on dendritic growth are *** simulation results show that the blocking effect of dendrites on melt flow is advanced with a larger number of *** competitive growth of the converging columnar dendrites is determined by the interaction between heat flow and forced ***-driven natural convection leads to highly asymmetric growth of equiaxed *** sinking downwards of the heavy solute,chimney-like or mushroom-like solute plumes are formed in the melt in front of the columnar dendrites when they grow along the gravitational *** details on dendritic growth of Al-Cu alloy under convection are revealed by 3D simulations.

关键词： simulation cellular automaton dendritic growth melt convection

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The Crystallization and Fracture Toughness of Transparent Glass-ceramics with Various Al_(2)O_(3) Additions for Mobile Devices

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Journal of Wuhan University of technology(Materials Science) 2022年第3期37卷 378-384页

作者： ZHENG Weihong LI Changqin YUAN Jian TIAN Peijing TENG Fei WANG Weizheng PENG Zhigang WANG Wei State Key Laboratory of Silicate Building Materials Wuhan University of TechnologyWuhan 430070China Shahe Research Institute of Glass Technology Shahe 054100China School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China

Li_(2)O-Al_(2)O_(3)-SiO_(2)(LAS)glass-ceramics were prepared by a melting *** of different Al_(2)O_(3)content on the structure,crystallization,transmittance and fracture toughness of LAS glassceramics were investigated by means of XRD,FESEM and other methods as *** results showed that the glass transition temperature and crystallization temperature of samples increased as the content of Al_(2)O_(3)increased from 4.1 wt%to 13.1 wt%,which restrained the precipitation of lithium disilicate *** main crystalline phase of glass-ceramics transformed from lithium disilicate and petalite to silicon dioxide,which reduced the fracture toughness of *** the Al_(2)O_(3)content was 7.1 wt%,the specimen had outstanding transmittance and fracture *** transmittance was 90.32%.The fracture toughness was 1.13 MPa•m^(1/2).Compared with high-alumina glass,the fracture toughness of the glass-ceramic was greatly improved,and it could be used as a new type of protective material for mobile devices.

关键词： transparent glass-ceramics crystallization Al_(2)O_(3) lithium disilicate petalite

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Design and simulation of a foldable hexagon array solar panel for electric vehicles 31

Design and simulation of a foldable hexagon array solar pane...

引用

31st Youth Academic Annual Conference of Chinese Association of Automation, YAC 2016

作者： Huang, Yuhang Wei, Xiaoxu Liu, Chong hubei, Anqi Zheng Key Laboratory of Advanced Technology for Automotive Components Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan China

ISBN: (纸本)9781509044238

Hexagonal array solar cell as the energy of the solar car, and further analyzes it. This article describes the working principle of the solar cells. Establishing the simulation model for the solar mathematical module, and get the same solar cells output characteristic curves in any number of series and parallel at different temperatures and different light intensity based on MATLAB/SIMULINK. Meanwhile designing an array solar panel consisted of various kinds of different parameters solar cells. By analyzing the output characteristics of the actual solar cells module, verify the feasibility and the importance of the simulation module. © 2016 IEEE.

关键词： Solar panels

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Preparation and Composition Distribution in Hollow Tubular TiB-Ti Composites during Centrifugal Spraying Process

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Journal of Wuhan University of technology(Materials Science) 2022年第3期37卷 518-524页

作者： ZHANG Zhongren DU Runkun ZHANG Fan ZHANG Jinyong LEI Liwen WANG Wei School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China

The hollow cylinders of TiB-Ti composites with a gradient distribution of Ti phase were synthesized by the combination of traditional slurry spray with centrifugal forming *** influences of the concentration of sodium hexametaphosphate(SHMP),the concentration of polyvinyl alcohol(PVA)and solid content(20 vol%-35 vol%)on the rheological properties of the TiB_(2)-Ti composite slurries were *** with low viscosity,weak thixotropy and shear-thinning behaviour were obtained for facilitating the slurry spraying *** effects of different centrifugal conditions on the migration of components during the forming process were *** phase composition and the elements distribution of the prepared samples were characterized by the energy-dispersive X-ray *** observations revealed that the samples fabricated at 1500 r/min for 3 min had a significant composition *** two-phase systems with small density differences and large particle size variation,centrifugal time was more important than centrifugal speed in forming a continuous gradient structure.

关键词： hollow tubular TiB-Ti composites centrifugal spraying process rheological properties composition distribution

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Force and strength analysis of FSAE racing suspension based on spatial analytic geometry 6

Force and strength analysis of FSAE racing suspension based ...

引用

2019 6th International Conference on advanced Composite Materials and Manufacturing Engineering, ACMME 2019

作者： Rui, Ren Gong, Bian Fang, Zhigang School of Automobile and Traffic Engineering Wuhan University of Science and Technology Wuhan430065 China Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan430070 China

Based on spatial analytic geometry, the paper established a mechanical of suspension system, which is aimed at the structure of double transverse arm suspension of FSAE racing car. Combined with the typical driving conditions of the car, we have worked it out with the MATLAB. Based on that, we have made the finite element static checking analysis with ANSYS, which is aimed at providing effective basis for the design and optimization of racing car. © Published under licence by IOP Publishing Ltd.

关键词： automobile suspensions

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Effect of film types on thermal response,cellular structure,forming defects and mechanical properties of combined in-mold decoration and microcellular injection molding parts

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Journal of Materials Science & technology 2021年第33期92卷 98-108页

作者： Wei Guo Zhihui Yu Wenting Wei Zhenghua Meng Huajie Mao Lin Hua School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced Technology for Automotive Components(Wuhan University of Technology) Wuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan 430070China Hubei Research Center for New Energy&Intelligent Connected Vehicle Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

Different types of polymer films were used in the combined in-mold decoration and microcellular injection molding(IMD/MIM)*** multiphase fluid-solid coupled heat transfer model was established to study the thermal response at the melt filling stage in the IMD/MIM *** was found that the temperature distributed asymmetrically along the thickness direction due to the changed heat transfer coefficient of the melt on the film *** polyethylene terephthalate(PET)films were applied,the temperature of the melt-film interface increased faster and to be higher at the end of melt filling stage in comparison with the application of polycarbonate(PC)and thermoplastic polyurethane(TPU)*** the effects of film types on the cellular structure,forming defects and mechanical properties of IMD/MIM parts were also studied *** results showed that the film types had no obvious effect on the cells size in the transition layer and the mechanical properties of the *** certain film thickness,the offset distance of core layer was the largest with PET film used,while the offset distance was the smallest with TPU film *** similar results were found for the warpage of the ***,an exactly opposite change occurred for the thickness of film-side transition layer and the bubble marks on the surface of the parts.

关键词： Microcellular injection molding In-mold decoration Thermal response Cellular structure Forming defects Mechanical properties

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