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Control of electromechanical performance in 3d printing latticestructured BaTiO_(3) piezoelectric ceramics

Journal of Advanced Ceramics 2024年第7期13卷 987-1001页

作者： Zhujun Jiang Yinghong Sun Jimin Chen Yong Zeng Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China Beijing Engineering Research Center of 3D Printing for Digital Medical Health Beijing University of TechnologyBeijing 100124China

Barium titanate(BaTiO_(3))piezoelectric ceramics with triply periodic minimal surface(TPMS)structures have been frequently used in filters,engines,artificial bones,and other fields due to their high specific surface area,high thermal stability,and good heat ***,only a limited number of studies have analyzed the effect of various parameters,such as different wall thicknesses and porosities of TPMS structures,on ceramic electromechanical *** this study,we first employed vat photopolymerization(VPP)three-dimensional(3d)printing technology to fabricate high-performance BaTiO_(3) *** investigated the slurry composition design and forming process and designed a stepwise sintering postprocessing technique to achieve a density of 96.3%and a compressive strength of 250±25 MPa,with the piezoelectric coefficient(d_(33))reaching 263 pC/***,we explored the influence of three TPMS structures,namely,diamond,gyroid,and Schwarz P,on the piezoelectric and mechanical properties of BaTiO_(3) ceramics,with the gyroid structure identified as exhibiting optimal ***,we examined the piezoelectric and mechanical properties of BaTiO_(3) ceramics with the gyroid structure of varying wall thicknesses and porosities,thus enabling the modulation of ceramic electromechanical performance.

关键词： three-dimensional(3d)printing piezoelectric ceramics porous structure mechanical properties electrical properties

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Simulation Analysis of Stress Field of Walnut Shell Composite Powder in Laser Additive Manufacturing Forming

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Journal of Renewable materials 2023年第1期11卷 333-347页

作者： Yueqiang Yu Tingang Ma Suling Wang Minzheng Jiang Yanling Guo Ting Jiang Shuaiqi Huang Ziming Zheng Bo Yan Jiyuan Lv College of Mechanical Science and Engineering Northeast Petroleum UniversityDaqing163318China College of Mechanical and Electrical Engineering Northeast Forestry UniversityHarbin150040China Research and Development Center of 3D Printing Material and Technology Northeast Forestry UniversityHarbin150040China

A calculation model of stress field in laser additive manufacturing of walnut shell composite powder(walnut shell/Co-PES powder)was *** dFLUX subroutine was used to implement the moveable application of a double ellipsoid heat source by considering the mechanical properties varying with *** stress field was simulated by the sequential coupling method,and the experimental results were in good accordance with the simulation *** addition,the distribution and variation of stress and strain field were obtained in the process of laser additive manufacturing of walnut shell composite *** displacement of laser additive manufacturing walnut shell composite parts gradually decreased with increasing preheating temperature,decreasing laser power and increasing scanning *** the cooling process,the displacement of laser additive manufacturing of walnut shell composite parts gradually increased with the increasing preheating temperature,decreasing scanning speed and increasing laser power.

关键词： Selective laser sintering agricultural and forestry wastes walnut shell stress field warping deformation

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Cutting Experiment of Fraxinus mandshurica UsingWaterjet-Assisted CO_(2)Laser

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Journal of Renewable materials 2023年第9期11卷 3583-3593页

作者： Yueqiang Yu Minzheng Jiang Sheng Gao Ting Jiang Bakary S.doumbia Bo Yan Tingang Ma Kexin Ren Yinsong Liu College of Mechanical Science and Engineering Northeast Petroleum UniversityDaqing163318China Forestry and Woodworking Machinery Engineering Technology Center Northeast Forestry UniversityHarbin150040China Research and Development Center of 3D Printing Material and Technology Northeast Forestry UniversityHarbin150040China

High-quality wood products and valuable wood crafts receive everyone’s favor with the rapid development of the *** order to improve the cutting surface quality of wood forming parts,the cutting experiment of renewable Fraxinus mandshurica was conducted by waterjet-assisted CO_(2)laser(WACL)technology.A quadratic mathematical model for describing the relationship between surface roughness changes and cutting parameters was *** effects of cutting speed,flow pressure and laser power on the kerf surface roughness of Fraxinus mandshurica when cutting transversally were discussed by response surface *** experimental results showed that kerf surface roughness decreased under a lower laser power,higher cutting speed and higher flow *** the cutting speed was 30 mm/s,flow pressure was 1.58 MPa and laser power was 45 W,the actual surface roughness of the optimized Fraxinus mandshurica was 2.41μm,and it was in accord with the theoretically predicted surface roughness value of 2.54μm,so the model fitted the actual situation *** the analysis of 3d profile morphology and micromorphology,it was concluded that the optimized kerf surface of Fraxinus mandshurica was smoother,the cell wall was not destroyed and the tracheid was *** provides the theoretical basis for wood micromachining.

关键词： Green processing waterjet-assisted CO_(2)laser machining transverse cutting response surface method surface roughness

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Construction of Equipment dataset and Model design for SLA-based 3d printing Process Optimization

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Transactions of the Korean Institute of Electrical Engineers 2024年第4期73卷 738-743页

作者： Lim, Tae-Hoon Shin, Hwa-Seon Ha, Cheol-Woo Lee, Hye-In Intelligence Integrated SW Research Center Korea Electronics Technology Institute Korea Republic of 3D Printing Manufacturing Innovation Center Korea Institute of Industrial Technology Korea Republic of Intelligence Integrated SW Research Center Korea Electronics Tech Korea Korea Republic of

This paper describes training data construction and analysis for developing a process-optimized artificial intelligence model to minimize errors occurring during the SLA-based additive manufacturing process. The photocurable resin molding method is a way in which UV lasers are irradiated into a tank containing liquid resin, solidified and stacked layer by layer, and like other additive manufacturing methods, there is an error in output deformation. However, due to the opaque resin, it is more difficult to check the error pattern than other method printer. In this study, to detect these error patterns, collecting data system in the actual process was established for sensor data, image data, and thermal image data and a study on data analysis was conducted. Copyright © The Korean Institute of Electrical Engineers.

关键词： 3d printing

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Effect of Post-heat Treatment on Microstructure and Mechanical Properties of Laser Cladded High Co-Ni Secondary Hardening Steel Coating 11

Effect of Post-heat Treatment on Microstructure and Mechanic...

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11th Annual International Conference on material Science and Environmental Engineering, MSEE 2023

作者： Qin, Renyao Chen, Bingqing Zhang, Guohui Liu, Wei Li, Neng Huang, Shuai Gao, Chao 3D Printing Research & Engineering Technology Center Beijing Institute of Aeronautical Materials Huanshancun Haidian District Beijing100095 China

The effect of post-heat treatment on the microstructure and microhardness of laser cladded high Co-Ni secondary hardening steel coating was investigated. The microstructures were analyzed using a SEM equipped with an EdS, and the microhardness was measured with a Vickers indenter. decomposition of the retained austenite in the coating occurred during the post-heat treatment. As the temperature increased from 200 oC to 600 oC, the quantity of the retained austenite at the boundaries decreased significantly, while that of the needle-shaped M3C cementite and M2C carbides increased. The M2C carbides evidently coarsened when the temperature was higher than500 oC. The microhardness of high Co-Ni steel coating increased as the temperature of post-heat treatment increased from 200 oC to 400 oC because the fine-scale M2C carbides were coherent with the matrix and increased distinctly in this temperature range. It decreased sharply when the temperature further increased from 500 oC to 600 oC due to both the incoherency of the coarsened M2C carbides and the recovery of dislocations in the carbon-supersaturated matrix. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Carbides

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Analysis and modelling of damage mechanism in FdM 3d-printed lattice structure under compression loading

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Journal of Mechanical Science and technology 2023年第3期37卷 1089-1095页

作者： Corvi, Alberto Collini, Luca Sciancalepore, Corrado Kumar, Ajeet Department of Engineering and Architecture University of Parma Parma Italy High Speed 3D Printing Research Center National Taiwan University of Science and Technology Keelung Rd Taipei106 Taiwan

Fused filament fabrication (FFF), commercially known as fused deposition modelling (FdM), is a widespread 3d printing process that builds up components by depositing a continuous filament of material, typically a thermoplastic, along a deTermined path. The mechanical performance of such parts is promising, even if strongly influenced by the deposition process. In this work, the mechanical behaviour of a specific lattice structure printed in acrylonitrile butadiene styrene (ABS) is studied and a model of lattice behaviour up to the damage regime is developed, with emphasis on the resulting anisotropy. The investigation starts with the analysis of the anisotropy of simple prismatic samples printed with various filament orientations. deformation and damage of the lattice structure under compressive loading is observed at the meso- and micro-scales. An anisotropic model is then developed within the ABAQUS© environment to reproduce the elasto-plastic behaviour, incorporating onset and evolution of inter- and intra-layer damage. Good agreement is observed between the modelled and experimental response. © 2023, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Fabrication

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Progress in Nb-Si ultra-high temperature structural materials:A review

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Journal of materials Science & technology 2023年第18期149卷 127-153页

作者： Wei Liu Shuai Huang Chengtong Ye Lina Jia Yongwang Kang Jiangbo Sha Bingqing Chen Yu Wu Huaping Xiong 3D Printing Research and Engineering Technology Center Beijing Institute of Aeronautical MaterialsBeijing 100095China School of Materials Science and Engineering Beihang UniversityBeijing 100191China Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical MaterialsBeijing 100095China

Nb-Si based alloys have the greatest potential to replace nickel-based superalloys and become a new gen-eration ultra-high temperature structural material with service temperature of 1200-1400℃ due to their high melting point,high stiffness,low density,and attractive specific mechanical properties at elevated *** article reviewed the recent progress in the development of Nb-Si based refractory *** attention was paid to the property characteristics,preparation techniques,alloying effects,oxidation resistance and fabrication of Nb-Si based alloy ***,the trend of develop-ment in the future was forecasted,including:Optimization of the composition and microstructure of Nb-Si based alloys to achieve a balance of mechanical properties;Comprehensive properties evaluation for Nb-Si based alloys to accumulate sufficient data for engineering applications;development of practical preparation technology for Nb-Si based alloy components with complex shapes;New multilayer compos-ite coatings for Nb-Si based alloy;Joining technology of Nb-Si alloy to itself and to superalloy.

关键词： Nb-Si based alloys Alloying Mechanical property Fracture toughness Oxidation behavior Coating

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Laser Additive Manufacturing on Metal Matrix Composites: A Review

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Chinese Journal of Mechanical Engineering 2021年第3期34卷 195-210页

作者： Neng Li Wei Liu Yan Wang Zijun Zhao Taiqi Yan Guohui Zhang Huaping Xiong 3D Printing Research&Engineering Technology Center Beijing Institute of Aeronautical MaterialsBeijing 100095China

Important progresses in the study of laser additive manufacturing on metal matrix composites(MMCs)have been *** efforts and advances in additive manufacturing on 5 types of MMCs are presented and *** main focus is on the material design,the combination of reinforcement and the metal matrix,the synthesis principle during the manufacturing process,and the resulted microstructures as well as ***,the trend of development in future is forecasted,including:Formation mechanism and reinforcement principle of strengthening phase;material and process design to actively achieve expected performance;Innovative structure design based on the special properties of laser AM MMCs;Simulation,monitoring and optimization in the process of laser AM MMCs.

关键词： Laser additive manufacturing Metal matrix composites Microstructure Property

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Thermal History Simulation and Support-Based Optimization in L-PBF Manufacturing of Eye-Shaped Catenary Clamps

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Transactions of the Korean Institute of Electrical Engineers 2024年第2期73卷 407-411页

作者： Yun, Seok-Chul Park, Young Shin, Jaeho Intelligence Integrated SW Research Center Intelligent Information R&D Division Korea Electronics Technology Institute Korea Republic of Dept. 3D printing industry-university cooperation foundation Hanbat National University Korea Republic of Dept. of Electrical Engineering Hanbat National University Korea Republic of

This study performed thermal history simulation and strategy optimization for additive manufacturing of eye-shaped catenary clamps used in high-speed railway overhead lines. Instead of the conventional casting material CuAl10Fe2, SUS 316L material suitable for additive manufacturing and having good toughness was used. The thermal analysis simulation software for additive manufacturing was utilized to optimize the additive manufacturing strategy for the parts where heat diffusion was not sufficient. The optimized additive manufacturing strategy was verified by simulation while adding supports, and the accuracy of the simulation was confirmed by comparing the simulation results with the actual experimental results. The results of this study can provide useful guidelines for additive manufacturing of eye-shaped catenary clamps and can be applied to other parts with complex shapes. © 2024 Korean Institute of Electrical Engineers. All rights reserved.

关键词： Thermoanalysis

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Adaptive Layer Thickness and Lifting Force Control for Bottom Lighting LCd Based Additive Manufacturing 49

Adaptive Layer Thickness and Lifting Force Control for Botto...

引用

49th Annual Conference of the IEEE Industrial Electronics Society, IECON 2023

作者： Xue, Hong-Yi Tsai, Ming-Jong Wu, Han-Wei Graduate Institute of Automation and Control National Taiwan University of Science and Technology Taiwan High Speed 3D Printing Research Center National Taiwan University of Science and Technology Taipei Taiwan

ISBN: (纸本)9798350331820

To improve the printing efficiency of LCd Based Additive Manufacturing System, this study integrates adaptive layer thicknesses processing technique and adaptive lifting speed and position control during the printing process. Firstly, this study prints several samples with different thickness to find out the required curing time of the used resin. Secondly, some square samples with different slicing area are printed under different lifting speed and tensile stress force are recorded for analysis. The relationship between tension and lifting speed for different cross-sectional area can be modeled for the used material. Therefore, the lifting speed for different tensile forces and cross-sectional areas can be obtained by different shapes of objects. A safety factor is employed to obtained the maximum lifting force to improve the success rate of printing and save the printing time. A potentiometer is also equipped on the vertical axis for real-time monitoring the position and cooperates with a load cell to determine whether the printed object is separated from the bottom. In this study, a snowman-shaped object with different slopes is printed to demonstrate the benefit of adaptive layer thickness and the adaptive tension value with different lifting speed. The printing time can be reduced over 40% through the proposed method in which the layer thickness and lifting speed/position are adaptively controlled layer by layer. © 2023 IEEE.

关键词： 3d printing

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