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Application of Ag-Cu-Ti active metal composite filler in ceramic joining:a review

Frontiers of materials Science 2023年第4期17卷 1-35页

作者： Yuhang Li Jun WANG Ziyan SHEN Hangli Qian Wanliang Zhang Kaiyu Zhang Danqing Ying Qihang Zhou Chengshuang Zhou Lin Zhang Institute of Material Forming and Control Engineering Zhejiang University of TechnologyHangzhou 310014China Zhejiang Baima Lake Laboratory Co. Ltd.Hangzhou 310000China

As a structural and functional material with excellent properties,ceramics play an extremely important role in a wide range of industries,including life and *** expand the range of applications for ceramic materials,ceramics are often joined to metals and then *** the physical and chemical joining methods of ceramics to metals,the AMB method is efficient and simple,suitable for industrial applications,and has been a hot topic of ***,due to the problems of residual stresses caused by the large difference in thermal expansion coefficients between ceramic and metal brazing,composite fillers have become a very worthwhile solution by regulating the physical properties of the brazing material and improving the weld *** review describes the wetting principle and application of Ag‒Cu‒Ti active metal filler in the field of ceramic joining,with emphasis on the current stage of composite filler,and discusses the influence on the former brazing properties and organization after the introduction of dissimilar materials.

关键词： brazing composite filler residual stress active metal ceramic‒metal joints

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Synergistic Regulation of Nano-Precipitates and Reversed Austenite in Titanium-Free Maraging Steel by Low-Temperature Solution Treatment and Double Aging Treatment

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SSRN 2024年

作者： Liu, Xin Liu, Zheye Zhang, Ye Xiao, Yu Feng, Zhiyuan Zhang, Kaiyu Zhang, Wanliang Zhou, Chengshuang Zhang, Lin Institute of Material Forming and Control Engineering Zhejiang University of Technology Hangzhou310014 China

To synergistically enhance the strength and toughness of titanium-free maraging steel, a multi-scale characterization method was used to illustrate the effects of low-temperature solution treatment and double aging treatment on the microstructure of titanium-free maraging steel in this paper. After the low-temperature solution treatment and the double aging treatment, the tensile strength of titanium-free maraging steel increased from 1954 MPa to 2160 MPa and the elongation increased by 8.95%. By the low-temperature solution treatment, the original austenite grain size of the titanium-free maraging steel was refined to 0.69μm. The double aging treatment promoted the diffusion of Mo and Ni elements, increased the volume fraction of ω phase, Ni3Mo nano-precipitation phase and reversed austenite, and refined the size of ω phase and Ni3Mo by 14.2% and 7.9%, respectively. The nanoparticles of titanium-free maraging steel mainly include the ω phase, Ni3Mo and Mo-rich phase. The strengthening mechanism of nanoparticles was quantitatively evaluated from the shear mechanism and Orowan dislocation loop mechanism. The mechanism shows that the ω phase is the main contributor to the overall precipitation strengthening. Therefore, low-temperature solution treatment and double aging treatment provide a potential solution for achieving high strength and high toughness in maraging steel. © 2024, The Authors. All rights reserved.

关键词： Microstructure

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Microstructure and mechanical properties stability of pre-hardening treatment in Al-Cu alloys for pre-hardening forming process

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International Journal of Minerals,Metallurgy and materials 2024年第3期31卷 539-551页

作者： Liping Tang Pengfei Wei Zhili Hu Qiu Pang Hubei Longzhong laboratory Xiangyang 441000China Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive EngineeringWuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center for Green&Precision Material Forming Wuhan University of TechnologyWuhan 430070China Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education School of Machinery and AutomationWuhan University of Science and TechnologyWuhan 430081China

The stability of the microstructure and mechanical properties of the pre-hardened sheets during the pre-hardening forming(PHF)process directly determines the quality of the formed *** microstructure stability of the pre-hardened sheets was in-vestigated by differential scanning calorimetry(DSC),transmission electron microscopy(TEM),and small angle X-ray scattering(SAXS),while the mechanical properties and formability were analyzed through uniaxial tensile tests and formability *** results in-dicate that the mechanical properties of the pre-hardened alloys exhibited negligible changes after experiencing 1-month natural aging(NA).The deviations of ultimate tensile strength(UTS),yield strength(YS),and sheet formability(Erichsen value)are all less than 2%.Also,after different NA time(from 48 h to 1 month)is applied to alloys before pre-hardening treatment,the pre-hardened alloys possess stable microstructure and mechanical properties as ***,with the extension of NA time before pre-hardening treatment from 48 h to 1 month,the contribution of NA to the pre-hardening treatment is *** a yield strength increment of 20 MPa is achieved,with no loss in *** limited enhancement is mainly attributed to the fact that only a limited number of clusters are transformed into Guinier-Preston(GP)zones at the early stage of pre-hardening treatment,and the formation ofθ''phase inhibits the nucleation and growth of GP zones as the precipitated phase evolves.

关键词： Al-Cu alloy pre-hardened alloy natural aging mechanical properties microstructure

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Trivalent Ni oxidation controlled through regulating lithium content to minimize perovskite interfacial recombination

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Rare Metals 2022年第1期41卷 96-105页

作者： Jin-Jin Zhao Xiao Su Zhou Mi Ying Zhang Yan-Jun Hu Hua-Jun Guo Yi-Nan Jiao Yu-Xia Zhang Yan Shi Wei-Zhong Hao Jing-Wei Wu Yi Wang Cun-Fa Gao Guo-Zhong Cao School of Materials Science and Engineering School of Mechanical EngineeringShijiazhuang Tiedao UniversityShijiazhuang 050043China School of Materials Science and Engineering Hebei Key Laboratory of Material Near Net Forming TechnologyHebei University of Science and TechnologyShijiazhuang 050018China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Materials Science and Engineering University of WashingtonSeattleWA 98195-2120USA

Organic–inorganic hybrid perovskite solar cells,one of the most promising photovoltaic devices,have made great progress in their efficiency and preparation *** this study,uniform,highly conductive Li_(n)NiO_(x)(0≤n≤1;0controlled interfacial oxidation was induced by Ni^(3+).The Li_(0.32)NiO_(x)inhibited charge recombination,reduced the defect density,and enhanced the photocurrent density.A maximum power conversion efficiency of 20.44%was obtained by Li_(0.32)NiO_(x).Further,in the long-term,in-air stabilities of unencapsulated Li_(n)-NiO_(x) perovskite solar cells were demonstrated.

关键词： Lithium ions Ni^(3+) Oxidized defect Photocurrent Perovskite solar cells

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Monitoring the Evolution of Dimensional Accuracy and Product Properties in Property-controlled forming Processes

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SSRN 2023年

作者： Stebner, Sophie Charlotte Martschin, Juri Arian, Bahman Dietrich, Stefan Feistle, Martin Hütter, Sebastian Lafarge, Rémi Laue, Robert Li, Xinyiang Schulte, Christopher Spies, Daniel Thein, Ferdinand Wendler, Frank Wrobel, Malte Vasquez, Julian Rozo Dölz, Michael Münstermann, Sebastian Integrity of Materials and Structures RWTH Aachen University Aachen Germany Institute of Forming Technology and Lightweight Components Dortmund University Dortmund Germany Forming and Machining Technology Paderborn University Paderborn Germany Institute for Applied Materials - Material Science Karlsruhe Institute of Technology Karlsruhe Germany Fraunhofer Institute for Casting Composite and Processing Technology Garching Germany Institute of Materials and Joining Technology Otto-von-Guericke University Magdeburg Germany Forming and Machining Processes Technische Universität Dresden Dresden Germany Institute for Machine Tools and Productions Processes Virtual Production Engineering Chemnitz University of Technology Chemnitz Germany Institute of Metal Forming RWTH Aachen University Aachen Germany Institute of Automatic Control RWTH Aachen University Aachen Germany Institute for Production Engineering and Forming Machines Technical University of Darmstadt Darmstadt Germany Institut für Geometrie und Praktische Mathematik RWTH Aachen University Aachen Germany Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany Digital Process Engineering Group Institute for Mechanical Process Engineering and Mechanics Karlsruhe Institute of Technology Karlsruhe Germany Materials Test Engineering Dortmund University Dortmund Germany

As recent trends in manufacturing engineering disciplines show a clear development in the sustainable as well as economically efficient design of forming processes, monitoring techniques have been gaining in relevance. In terms of monitoring of product properties, most processes are currently open-loop controlled, entailing that the microstructure evolution, which determines the final product properties, is not considered. However, a closed-loop control that can adjust and manipulate the process actuators according to the required product properties of the component will lead to a considerable increase in efficiency of the processes regarding resources and will decrease postproduction of the component. For most forming processes, one set of component dimensions will result in a certain set of product properties. However, to successfully establish closed-loop property controls for the processes, a systematic understanding of the reciprocity of the dimensions after forming and final product properties must be established. This work investigates the evolution of dimensional accuracy as well as product properties for a series of forming processes that utilize different degrees of freedom for process control. © 2023, The Authors. All rights reserved.

关键词： Process control

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Improving recrystallization of ultrasonic welded joint of SiC p /Al composites via pulsed current

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materials Characterization 2025年 227卷

作者： Zhuobin Sun Mengwei Shen Zeyang Li Xiao Yang Jingwei Liang Wenquan Wang Zhimin Liang Xinge Zhang Yongmei Liang State Key Laboratory of Automotive Simulation and Control Jilin University Changchun 130022 PR China Key Laboratory of Automobile Materials of Ministry of Education Jilin University Changchun 130025 PR China Hebei Key Laboratory of Material Near-Net Forming Technology School of Materials Science and Engineering Hebei University of Science and Technology Shijiazhuang 050018 PR China

In this study, we innovatively applied pulsed current to enhance the recrystallization of SiC p /Al composites during ultrasonic welding for the first time. The results show that the grain size of Al matrix is significantly refined from 15 μm to 2 μm by pulsed current. The optimization of grain size observably increases the tensile load of the joint from 2.0 kN to 3.7 kN. The improvement in recrystallization is attributed to the pulsed current facilitating the movement and multiplication of the dislocations in the Al matrix. Meanwhile, due to the lattice mismatch between SiC and Al, the dislocation is difficult to pass through the SiC p , leading to substantial dislocation be accumulated at the SiC/Al interface. Moreover, the electron density around the particles is higher due to the shape effect of particles on electron motion, which will provide a driving force for the evolution of accumulated dislocation towards grain boundary. The process of recrystallization will consume accumulated dislocation and promote the subsequent movement of dislocations. Ultimately, the grain size of the SiC p /Al composites joint is refined and the peak failure load is increased.

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Corrigendum to “Strain-induced twins and martensite: Effects on hydrogen embrittlement of selective laser melted (SLM) 316L stainless steel” [Corros. Sci. 208 (2022) 110669]

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Corrosion Science 2023年 215卷

作者： Yuanjian Hong Chengshuang Zhou Stefan Wagner Sabine Schlabach Astrid Pundt Lin Zhang Jinyang Zheng Institute of Material Forming and Control Engineering Zhejiang University of Technology Hangzhou 310014 China Karlsruhe Institute of Technology (KIT) Institute for Applied Materials Materials Science and Engineering (IAM-WK) Kaiserstraße 12 Karlsruhe 76131 Germany Karlsruhe Institute of Technology (KIT) Karlsruhe Nano Micro Facility (KNMFi) Kaiserstraße 12 Karlsruhe 76131 Germany Institute of Process Equipment Zhejiang University Hangzhou 310027 China

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Corrigendum to “Preparation of high-performance polymer piezoelectric thin film by electric field induction technology” [Polymer 196 (2020) 122486]

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Polymer 2021年 221卷

作者： Tingting Cai Ting Bi Yun Yang Ernest Bi Shuping Xue Department of Chemistry and Chemical Engineering Luliang University Lvliang 033000 PR China Material Forming and Control Engineering Taiyuan University of Science and Technology Jincheng 048011 PR China Department of Mining Engineering Luliang University Lvliang 033000 PR China

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Corrigendum to ‘Preparation of high-performance polymer piezoelectric thin film by electric field induction technology’ [Polymer 196 (2020) 122486]

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Polymer 2021年 216卷

作者： Tingting Cai Ting Bi Yun Yang Huan Bi Shuping Xue Department of Chemistry and Chemical Engineering Luliang University Lvliang 033000 PR China Material Forming and Control Engineering Taiyuan University of Science and Technology Jincheng 048011 PR China Department of Mining Engineering Luliang University Lvliang 033000 PR China School of Chemical Engineering Changchun University of Technology Changchun 130012 PR China

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Music genre influence and artist similarity based on data analysis

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Journal of Physics: Conference Series 2021年第1期1903卷

作者： Yuhui Xiao Zhilin He Huming Liao Kangjian Huang Jianping Zhao Yuchen Wu Nuclear engineering and technology Chengdu University of Technology ChengDu SiChuan Province 610059 China Mathematics and Applied Mathematics Chengdu University of Technology ChengDu SiChuan Province610059 China Department of Computer Science and Technology Chengdu University of Technology ChengDu SiChuan Province 610059 China Material forming and control engineering (Welding and inspection) Southwest Petroleum University ChengDu SiChuan Province 610599 China Physics Southwest University ChongQing City 400715 China

Based on related data and cluster analysis, this paper creates a mathematical model of similarity measurement based on the data set, and finally obtains the influence of different music genres on their followers and the similarity of artists of different musical genres. Here, since the study is about the similarity of music, it is divided into 2 categories according to the provided music characteristics and related indicators of music type. The data is standardized and normalized. Because there is no clear indicator to measure the similarity of music, we use spss to perform K-means clustering analysis. Here, since the similarity of music is studied, it is built on the music characteristics and music provided. Types of related indicators divide it into two categories for analysis. In order to determine the reliability of the model, this article uses meaningful learning to train 70% of the previous data, 30% to test, and finally establishes a complete mathematical model.

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