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Alloy design paradigms in additive manufacturing:a new era of material innovation 认领 引用
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作者 Li Zhao Tianshu Liu +5 位作者 Hyoung Seop Kim Tarasankar Debroy Tomasz Kurzynowski Konrad Gruber Xiaowei Hu Chaolin Tan 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第3期578-594,共17页
Additive manufacturing(AM)is revolutionizing the aerospace,transportation,energy,and biomedical fields due to its capacity for rapid production of geometrically complex components.The advancement of alloys for AM is c... Additive manufacturing(AM)is revolutionizing the aerospace,transportation,energy,and biomedical fields due to its capacity for rapid production of geometrically complex components.The advancement of alloys for AM is critical to further boost those applications.The first-generation alloys for AM largely rely on conventional commercial alloys that were originally developed under the assumption of near-equilibrium solidification.However,some of these materials are incompatible with the non-equilibrium metallurgical behavior of AM,which may face issues like high crack susceptibility.Thus,the second-generation alloy design for AM builds upon conventional alloy systems by inoculation treatments with alloying elements(e.g.,zirconium)or ceramic reinforcements(e.g.,titanium carbide)to achieve better material printability and properties.Meanwhile,the limitations of commercial materials underscore the need for developing novel alloys specifically tailored for AM.The third-generation empirical approach for material design adopts a knowledge-driven strategy by leveraging established metallurgical principles and empirical correlations to guide targeted composition optimization.Such trial-and-error strategies for discovering new materials face substantial bottlenecks like long development cycles and high costs.Hence,it has propelled research toward the fourth-generation paradigm—data-driven artificial intelligence(AI)assisted materials design for AM,which is an effective and innovative material solution guided by AM-specific metallurgical features.Advances in AI and robotics will shift the future paradigm of AM-specific alloy design toward an autonomous AI-Lab,which leverages an intelligent AM agent and automated high-throughput AM printing and testing for materials discovery. 展开更多
关键词 additive manufacturing material innovation machine learning artificial intelligence alloy design paradigm material agent AI auto-lab
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Strength-based concurrent design for structural topology and building orientation of additively manufactured lattice structure 认领 引用
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作者 Chenyang LI Yamin LI +3 位作者 Shangqin YUAN Shaoying LI Jihong ZHU Weihong ZHANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第9期540-558,共19页
A novel Additive Manufacturing(AM)-driven concurrent design strategy based on the beam characterization model considering strength constraints is proposed.The lattice topology,radius size,Building Orientation(BO),and ... A novel Additive Manufacturing(AM)-driven concurrent design strategy based on the beam characterization model considering strength constraints is proposed.The lattice topology,radius size,Building Orientation(BO),and structural yield strength can be simultaneously adjusted by integrating the overall process-structure-performance relationship of the AM process into the optimization.Specifically,the transverse isotropic material model is adopted to describe the material properties induced by the layer-by-layer manner of additive manufacturing.To bolster lattice strength performance,the stress constraints and ratio constraints of lattice struts are employed.The Tsai-Wu yield criterion is implemented to characterize the lattice strut's strength,while the P-norm method streamlines the handling of multiple constraints,minimizing computational overhead.Moreover,the gradient-based optimization model is established,where both the individual struts diameters and BO can be designed,and the buckling-prone spatial struts are strategically eliminated to improve the lattice strength further.Furthermore,several typical structures are optimized to verify the effectiveness of the proposed method.The optimized results are quite encouraging since the heterogeneous lattice structures with optimized BO obtained by the strength-based concurrent method show a remarkably improved performance compared to traditional designs. 展开更多
关键词 Strength-based design AM-driven design Concurrent design Building orientation Additive manufacturing
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Designing Additive‐Manufactured High‐Performance CoCrNi Matrix Composites Based on Grain Boundary Segregation 认领 引用
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作者 Cunliang Pan Yuxuan Chen +7 位作者 Zhengyi Jin Pinghu Chen Hongmei Zhu Xingwang Bai Hao Luo Xiaoqiang Li Yinghao Zhou Konrad Kosiba 《Rare Metals》 SCIE EI CAS CSCD 2026年第6期640-655,共16页
Through grain boundary segregation engineering,a crack‐free high‐strength CoCrNi medium‐entropy alloy(MEA)can be successfully fabricated via laser powder bed fusion(PBF‐LB).The influence of micron‐sized TiC parti... Through grain boundary segregation engineering,a crack‐free high‐strength CoCrNi medium‐entropy alloy(MEA)can be successfully fabricated via laser powder bed fusion(PBF‐LB).The influence of micron‐sized TiC particles on microstructural evolution,grain boundary segregation behavior,and mechanical properties was systematically investigated in the present study.Additionally,the high‐temperature oxidation mechanism of the CoCrNi alloy was elucidated.At an optimal TiC content of 3 wt%,carbon segregation at grain boundaries significantly reduced the grain boundary energy,hence destabilizing the liquid film and promoting grain coalescence during solidification.This process effectively suppressed hot cracking.Partial dissolution of TiC during PBF‐LB processing led to the formation of nano‐sized Cr23C6precipitates and TiC/TiO2core-shell structures at grain boundaries.These precipitates acted as effective Zener pinning sites,which inhibited columnar grain growth and refined the grain structure.As a result,the CoCrNi-3 wt%TiC composite exhibited markedly superior mechanical properties and excellent high‐temperature oxidation resistance.Furthermore,this composite demonstrated excellent high‐temperature oxidation resistance.The fine‐grained microstructure facilitated selective Cr oxidation,which led to the rapid formation of a dense Cr2O3protective scale.Simultaneously,the relatively high diffusion coefficient of Cr enabled its migration toward loosely packed TiO2regions,contributing to the formation of a continuous and self‐healing Cr2O3layer.Altogether,these mechanisms provide improved oxidation protection and long‐term stability at elevated temperatures. 展开更多
关键词 additive manufacturing CoCrNi MEA grain boundary segregation high‐temperature oxidation laser powder bed fusion
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Advancements in AI-Enabled Design and Process Optimization for Additive Manufacturing 认领 引用
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作者 Lingling Wu Shangqin Yuan 《Additive Manufacturing Frontiers》 CSCD 2025年第2期1-2,共2页
Additive Manufacturing(AM)has significantly impacted the development of high-performance materials and structures,offering new possibilities for industries ranging from aerospace to biomedicine.This special issue feat... Additive Manufacturing(AM)has significantly impacted the development of high-performance materials and structures,offering new possibilities for industries ranging from aerospace to biomedicine.This special issue features pioneering research that integrates AI-driven methods with AM,enabling the design and fabrication of complex,optimized structures with enhanced properties. 展开更多
关键词 additive manufacturing industry applications additive manufacturing am design optimization aerospace high performance materials AI driven methods complex structures
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Progress in additive manufacturing of nickel-based superalloys:materials,processing,microstructures,properties and alloy design 认领 引用 被引量：3
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作者 Li Gong Yu-Bo Li +3 位作者 Xiao-Pei Wang Sai Li Zhi-Gang Yang Hao Chen 《Rare Metals》 SCIE EI CAS CSCD 2025年第10期7041-7087,共47页
Notable advancements have been made in the additive manufacturing(AM)of aerospace materials,driven by the needs for integrated components with intricate geometries and small-lot production of high-value components.Nic... Notable advancements have been made in the additive manufacturing(AM)of aerospace materials,driven by the needs for integrated components with intricate geometries and small-lot production of high-value components.Nickel-based superalloys,pivotal materials for high-temperature bearing components in aeroengines,present significant challenges in the fabrication of complex parts due to their great hardness.Huge attention and rapid progress have been garnered in AM processing of nicklebased superalloys,largely owing to its distinct benefits in the freedom of fabrication and reduced manufacturing lifecycle.Despite extensive research into AM in nickel-based superalloys,the corresponding results and conclusions are scattered attributed to the variety of nickel-based superalloys and complex AM processing parameters.Therefore,there is still a pressing need for a comprehensive and deep understanding of the relationship between the AM processing and microstructures and mechanical performance of nickel-based superalloys.This review introduces the processing characteristics of four primary AM technologies utilized for superalloys and summarizes the microstructures and mechanical properties prior to and post-heat treatments.Additionally,this review presents innovative superalloys specifically accommodated to AM processing and offers insights into the material development and performance improvement,aiming to provide a valuable assessment on AM processing of nickel-based superalloys and an effective guidance for the future research. 展开更多
关键词 Additive manufacturing Nickel-based superalloys Processing optimization Microstructures and mechanical properties Alloy design
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Additive manufacturing-by-design for support structures:a critical review 认领 引用 被引量：2
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作者 Jinlong Su Yang Mo +3 位作者 Peijie Shangguan Chinnapat Panwisawas Fulin Jiang Swee Leong Sing 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2025年第5期52-80,共29页
Support structure,a critical component in the design for additive manufacturing(DfAM),has been largely overlooked by additive manufacturing(AM)communities.The support structure stabilises overhanging sections,aids in ... Support structure,a critical component in the design for additive manufacturing(DfAM),has been largely overlooked by additive manufacturing(AM)communities.The support structure stabilises overhanging sections,aids in heat dissipation,and reduces the risk of thermal warping,residual stress,and distortion,particularly in the fabrication of complex geometries that challenge traditional manufacturing methods.Despite the importance of support structures in AM,a systematic review covering all aspects of the design,optimisation,and removal of support structures remains lacking.This review provides an overview of various support structure types—contact and non-contact,as well as identical and dissimilar material configurations—and outlines optimisation methods,including geometric,topology,simulation-driven,data-driven,and multi-objective approaches.Additionally,the mechanisms of support removal,such as mechanical milling and chemical dissolution,and innovations like dissolvable supports and sensitised interfaces,are discussed.Future research directions are outlined,emphasising artificial intelligence(AI)-driven intelligent design,multi-material supports,sustainable support materials,support-free AM techniques,and innovative support removal methods,all of which are essential for advancing AM technology.Overall,this review aims to serve as a foundational reference for the design and optimisation of the support structure in AM. 展开更多
关键词 additive manufacturing support structure design and optimisation simulation sustainability 3D printing
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An energy-saving design method for additively manufactured integrated valve-controlled cylinders 认领 引用
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作者 Yang TANG Dengting LI +5 位作者 Honghao LIU Chao ZHANG Wujun WANG Jie CAI Huayong YANG Yi ZHU 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS CSCD 2025年第8期723-737,共15页
The integrated valve-controlled cylinder combines various control and execution components in hydraulic transmission systems.Its precise control and rapid response characteristics make it widely used in mobile equipme... The integrated valve-controlled cylinder combines various control and execution components in hydraulic transmission systems.Its precise control and rapid response characteristics make it widely used in mobile equipment for aerospace,robotics,and other engineering applications.Additive manufacturing provides high design freedom which can further enhance the power density of integrated valve-controlled cylinders.However,there is a lack of effective design methods to guide the additive manufacturing of valve-controlled cylinders for more efficient hydraulic energy transmission.This study accordingly introduces an energy-saving design method based on additive manufacturing for integrated valve-controlled cylinders.The method consists of two main parts:(1)redesigning the manifold block to eliminate leakage points and reduce energy losses through integrated design of the valve,cylinder,and piping;(2)establishing a pressure loss model to achieve energy savings through optimized flow channel design for bends with different parameters.Compared to traditional valve-controlled cylinders,the integrated valvecontrolled cylinder developed from our method reduces the weight by 31%,volume by 55%,and pressure loss in the main flow channel by over 30%.This indicates that the design achieves both lightweight construction and improved hydraulic transmission efficiency.This study provides theoretical guidance for the design of lightweight and energy-efficient valve-controlled cylinders,and may aid the design of similar hydraulic machinery. 展开更多
关键词 Valve-controlled cylinder Additive manufacturing Flow channel design Energy-saving machinery Integration
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Design and Mechanical Properties of Layered Gradient Lattice Structures Based on Additive Manufacturing 认领 引用 被引量：4
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作者 Zhixuan Sun Yu Gong +4 位作者 Yuanhao Tian Jianzhi Lang Jianyu Zhang Libin Zhao Ning Hu 《Additive Manufacturing Frontiers》 CSCD 2025年第1期49-59,共11页
Structural gradient changes are common in nature and play an important role in improving the carrying capacity of organisms.Graded lattice structures designed on this basis have received considerable attention due to ... Structural gradient changes are common in nature and play an important role in improving the carrying capacity of organisms.Graded lattice structures designed on this basis have received considerable attention due to their great design potential.In this study,two different layered gradient design strategies were proposed,and three lattice structures were designed.Samples with PA2200 nylon as the matrix material were prepared using additive manufacturing technology,and finite element models of the relevant lattice structures were established.The mechanical properties and energy absorption ability of the structures under different gradient spans and design strategies were investigated using quasi-static compression tests and numerical simulations.The results indicate that the layered design can improve the elastic modulus of the lattice structure by up to 40.05% and the energy absorption per unit volume by up to 13.04% compared to the conventional body-centered cubic(BCC)structure.However,it is worth noting that an excessively large interlayer gradient span can adversely affect the mechanical properties of the structure.In addition,all layered gradient lattice structures show significant anisotropy,and the energy absorption per unit volume can differ by up to 36.59%under different compression directions.The layered gradient structure design strategies proposed in this work can provide an effective reference for the design of gradient lattice structures. 展开更多
关键词 Additive manufacturing Graded lattice structure Numerical simulation Mechanical response
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Design and Manufacturing Strategies for Fused Deposition Modelling in Additive Manufacturing:A Review 认领 引用 被引量：7
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作者 Hugo I.Medellin-Castillo Jorge Zaragoza-Siqueiros 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2019年第3期1-16,共16页
Although several research works in the literature have focused on studying the capabilities of additive manufacturing(AM) systems, few works have addressed the development of Design for Additive Manufacturing(DfAM) kn... Although several research works in the literature have focused on studying the capabilities of additive manufacturing(AM) systems, few works have addressed the development of Design for Additive Manufacturing(DfAM) knowledge,tools, rules, and methodologies, which has limited the penetration and impact of AM in industry. In this paper a comprehensive review of design and manufacturing strategies for Fused Deposition Modelling(FDM) is presented.Consequently, several DfAM strategies are proposed and analysed based on existing research works and the operation principles, materials, capabilities and limitations of the FDM process. These strategies have been divided into four main groups: geometry, quality, materials and sustainability. The implementation and practicality of the proposed DfAM is illustrated by three case studies. The new proposed DfAM strategies are intended to assist designers and manufacturers when making decisions to satisfy functional needs, while ensuring manufacturability in FDM systems.Moreover, many of these strategies can be applied or extended to other AM processes besides FDM. 展开更多
关键词 Additive manufacturing(AM) Design for additive manufacturing(DfAM) Fused Deposition Modelling(FDM) Design and manufacturing strategies
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Design and development of the additively manufactured Zn-Li scaffolds for posterolateral lumbar fusion 认领 引用 被引量：1
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作者 Yu Qin Chunhao Yu +9 位作者 Peng Wang Hongtao Yang Aobo Liu Shuhan Wang Zhenquan Shen Senju Ma Yongcan Huang Binsheng Yu Peng Wen Yufeng Zheng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第12期180-191,共12页
Spinal fusion is a commonly used technique to treat acute and chronic spinal diseases by fusion of the adjacent vertebrae, aiming at achieving stability and eliminating the mobility of the objective segment. While bon... Spinal fusion is a commonly used technique to treat acute and chronic spinal diseases by fusion of the adjacent vertebrae, aiming at achieving stability and eliminating the mobility of the objective segment. While bone autografts and allografts have been conventionally used for spinal fusion, limitations persist in achieving optimization of both good osteoinductive capacity and mechanical stability. In this study, additively manufactured Zn-Li scaffolds were developed and evaluated for their potential in spinal fusion. First, three scaffold structures (BCC, Diamond, and Gyroid) were designed and verified in vitro. Due to the smooth transition surfaces and uniform degradation behavior, the Gyroid Zn-Li scaffold demonstrated mechanical integrity during degradation and enhanced cellular proliferation compared to the other two scaffolds. Subsequently, Zn-Li scaffolds (Gyroid) were selected for posterolateral lumbar fusion (L4/L5) in rabbits. Following 12 weeks of implantation, the Zn-Li scaffolds demonstrated a moderate biodegradation rate and satisfactory biocompatibility. Compared to bone allografts, the Zn-Li scaffolds significantly improved osseointegration adjacent to the transverse processes, which led to enhanced segmental stability of the fused vertebrae post posterolateral lumbar fusion. Overall, the results show that the biodegradable Zn-Li scaffold holds substantial potential as the next-generation graft for spinal fusion. 展开更多
关键词 Zn alloy Additive manufacturing Spinal fusion Biodegradable metals Osseointegration
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Fundamental approach to superior trade-off between strength and ductility of TiB/Ti64 composites via additive manufacturing:From phase diagram to microstructural design 认领 引用 被引量：2
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作者 Chen-Wei Liu Jianchao Li +7 位作者 Xiang Gao Yongkun Mu Zhouyang He Huan Wang Yandong Jia Bo Yuan Gang Wang Hua-Xin Peng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第18期220-232,共13页
Reinforcement distribution tailoring has been proven effective in strengthening and toughening titanium matrix composites(TMCs).In this work,the analysis of the Ti64(Ti-6Al-4V)-B phase diagram indicated that B content... Reinforcement distribution tailoring has been proven effective in strengthening and toughening titanium matrix composites(TMCs).In this work,the analysis of the Ti64(Ti-6Al-4V)-B phase diagram indicated that B content dominates the TiB distribution.With this philosophy,B content regulation was applied to tailor homogeneous and network structures in Ti64-B composites fabricated via laser-directed energy deposition additive manufacturing(AM).The unique plate-like TiB attends inhomogeneous composites(Ti64–0.05B).However,in network composite(Ti64–0.25B),the TiB whisker(TiBw)arranges along priorβ-Ti grains with the same orientation.Moreover,the synergistic improvement of strength(988 MPa→1202 MPa),stiffness(106 GPa→116 GPa),hardness(325 HV→362 HV),and uniform elongation(5%→7.8%)were achieved.This work exhibited a balanced strength/ductility trade-off,which provides a good guide on microstructure tailoring. 展开更多
关键词 Titanium-matrix composites(TMCs) Additive manufacturing(AM) Reinforcement distribution tailoring Strength/ductility trade-off Composition regulation
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Parametric Analysis and Designing Maps for Powder Spreading in Metal Additive Manufacturing 认领 引用
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作者 Yuxuan Wu Sirish Namilae 《Computer Modeling in Engineering & Sciences》 SCIE EI 2025年第2期2067-2090,共24页
Powder bed fusion(PBF)in metallic additive manufacturing offers the ability to produce intricate geometries,high-strength components,and reliable products.However,powder processing before energy-based binding signific... Powder bed fusion(PBF)in metallic additive manufacturing offers the ability to produce intricate geometries,high-strength components,and reliable products.However,powder processing before energy-based binding significantly impacts the final product’s integrity.Processing maps guide efficient process design to minimize defects,but creating them through experimentation alone is challenging due to the wide range of parameters,necessitating a comprehensive computational parametric analysis.In this study,we used the discrete element method to parametrically analyze the powder processing design space in PBF of stainless steel 316L powders.Uniform lattice parameter sweeps are often used for parametric analysis,but are computationally intensive.We find that non-uniform parameter sweep based on the low discrepancy sequence(LDS)algorithm is ten times more efficient at exploring the design space while accurately capturing the relationship between powder flow dynamics and bed packing density.We introduce a multi-layer perceptron(MLP)model to interpolate parametric causalities within the LDS parameter space.With over 99%accuracy,it effectively captures these causalities while requiring fewer simulations.Finally,we generate processing design maps for machine setups and powder selections for efficient process design.We find that recoating speed has the highest impact on powder processing quality,followed by recoating layer thickness,particle size,and inter-particle friction. 展开更多
关键词 Powder bed fusion additive manufacturing discrete element method parameter sweep process design
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Design and Additive Manufacturing of Metamaterial-Enabling Structure-Driven Material Properties 认领 引用
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作者 Ling Wang Bo Song 《Additive Manufacturing Frontiers》 CSCD 2025年第1期1-2,共2页
Additive manufacturing(AM)technology has revolutionized engineering field by enabling the creation of intricate,high-performance structures that were once difficult or impossible to fabricate.This transformative techn... Additive manufacturing(AM)technology has revolutionized engineering field by enabling the creation of intricate,high-performance structures that were once difficult or impossible to fabricate.This transformative technology has particularly advanced the development of metamaterials-engineered materials whose unique properties arise from their structure rather than composition-unlocking immense potential in fields ranging from aerospace to biomedical engineering. 展开更多
关键词 metamaterials structure driven additive manufacturing biomedical engineering material properties metamaterials engineered materials engineering
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An Optimization-Driven Design Scheme of Lightweight Acoustic Metamaterials for Additive Manufacturing 认领 引用 被引量：1
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作者 Ying Zhou Jiayang Yuan +3 位作者 Zhengtao Shu Mengli Ye Liang Gao Qiong Wang 《Computers, Materials & Continua》 SCIE EI 2025年第10期557-580,共24页
Simultaneously,reducing an acoustic metamaterial’s weight and sound pressure level is an important but difficult topic.Considering the law of mass,traditional lightweight acoustic metamaterials make it difficult to c... Simultaneously,reducing an acoustic metamaterial’s weight and sound pressure level is an important but difficult topic.Considering the law of mass,traditional lightweight acoustic metamaterials make it difficult to control noise efficiently in real-life applications.In this study,a novel optimization-driven design scheme is developed to obtain lightweight acoustic metamaterials with a strong sound insulation capability for additive manufacturing.In the proposed design scheme,a topology optimization method for an acoustic metamaterial in the acoustic-solid interaction system is implemented to obtain an initial cross-sectional topology of the acoustic microstructure during the conceptual design phase.Then,in the detailed design phase,the parametric model for a higher-dimensional design is formulated based on the topology optimization result.An adaptive Kriging interpolation approach is proposed to accurately reformulate a much easier surrogate model from the original parameterization formulation to avoid repeating calls for nonlinear analyses in the 3D acoustic-structure interaction system.A surrogate model was used to optimize a ready-to-print acoustic metamaterial with improved noise reduction performance.Experimental verification based on an impedance tube is implemented.Results demonstrate characteristics of the devised metamaterial as well as the proposed method. 展开更多
关键词 Topology optimization surrogate model additive manufacturing acoustic metamaterial sound pressure level
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Additive Design and Manufacturing of Jet Engine Parts 认领 引用 被引量：11
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作者 Pinlian Han 《Engineering》 SCIE EI CAS 2017年第5期648-652,共5页
The additive design （AD） and additive manufacturing （AM） of jet engine parts will revolutionize the traditional aerospace industry. The unique characteristics of AM, such as gradient materials and micro-structures... The additive design （AD） and additive manufacturing （AM） of jet engine parts will revolutionize the traditional aerospace industry. The unique characteristics of AM, such as gradient materials and micro-structures, have opened up a new direction in jet engine design and manufacturing. Engineers have been liberated from many constraints associated with traditional methodologies and technologies. One of the most significant features of the AM process is that it can ensure the consistency of parts because it starts from point（s）, continues to line（s） and layer（s）, and ends with the competed part. Collaboration between design and manufacturing is the key to success in fields including aerodynamics, thermodynamics, structural integration, heat transfer, material development, and machining. Engineers must change the way they design a part, as they shift from the traditional method of ＂subtracting material＂ to the new method of ＂adding material＂ in order to manufacture a part. AD is not the same as designing for AM, A new method and new tools are required to assist with this new way of designing and manufacturing. This paper discusses in detail what is required in AD and AM, and how current problems can be solved. 展开更多
关键词 Additive manufacturing Additive design Jet engine Porous structure
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Variable stiffness design optimization of fiber-reinforced composite laminates with regular and irregular holes considering fiber continuity for additive manufacturing 认领 引用 被引量：2
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作者 Yi LIU Zunyi DUAN +6 位作者 Chunping ZHOU Yuan SI Chenxi GUAN Yi XIONG Bin XU Jun YAN Jihong ZHU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第3期334-354,共21页
Fiber-reinforced composites are an ideal material for the lightweight design of aerospace structures. Especially in recent years, with the rapid development of composite additive manufacturing technology, the design o... Fiber-reinforced composites are an ideal material for the lightweight design of aerospace structures. Especially in recent years, with the rapid development of composite additive manufacturing technology, the design optimization of variable stiffness of fiber-reinforced composite laminates has attracted widespread attention from scholars and industry. In these aerospace composite structures, numerous cutout panels and shells serve as access points for maintaining electrical, fuel, and hydraulic systems. The traditional fiber-reinforced composite laminate subtractive drilling manufacturing inevitably faces the problems of interlayer delamination, fiber fracture, and burr of the laminate. Continuous fiber additive manufacturing technology offers the potential for integrated design optimization and manufacturing with high structural performance. Considering the integration of design and manufacturability in continuous fiber additive manufacturing, the paper proposes linear and nonlinear filtering strategies based on the Normal Distribution Fiber Optimization (NDFO) material interpolation scheme to overcome the challenge of discrete fiber optimization results, which are difficult to apply directly to continuous fiber additive manufacturing. With minimizing structural compliance as the objective function, the proposed approach provides a strategy to achieve continuity of discrete fiber paths in the variable stiffness design optimization of composite laminates with regular and irregular holes. In the variable stiffness design optimization model, the number of candidate fiber laying angles in the NDFO material interpolation scheme is considered as design variable. The sensitivity information of structural compliance with respect to the number of candidate fiber laying angles is obtained using the analytical sensitivity analysis method. Based on the proposed variable stiffness design optimization method for complex perforated composite laminates, the numerical examples consider the variable stiffness design optimization of typical non-perforated and perforated composite laminates with circular, square, and irregular holes, and systematically discuss the number of candidate discrete fiber laying angles, discrete fiber continuous filtering strategies, and filter radius on structural compliance, continuity, and manufacturability. The optimized discrete fiber angles of variable stiffness laminates are converted into continuous fiber laying paths using a streamlined process for continuous fiber additive manufacturing. Meanwhile, the optimized non-perforated and perforated MBB beams after discrete fiber continuous treatment, are manufactured using continuous fiber co-extrusion additive manufacturing technology to verify the effectiveness of the variable stiffness fiber optimization framework proposed in this paper. 展开更多
关键词 Variable stiffness composite laminates Discrete material interpolation scheme Normal distribution fiber optimization Discrete fiber continuous filtering strategy Additive manufacturing of composite laminates
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Synergistic solvation and interphase design via a steric-electronic additive for ultra-long cycling lithium metal batteries 认领 引用
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作者 Min Cheng Xu Zhou +1 位作者 Yuhang Liang Yuanhui Zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第9期759-768,I0020,共10页
The electrochemical instability of traditional ether-based electrolytes poses a challenge for their use in high-voltage lithium metal batteries.Herein,a synergetic optimization strategy was proposed by introducing an ... The electrochemical instability of traditional ether-based electrolytes poses a challenge for their use in high-voltage lithium metal batteries.Herein,a synergetic optimization strategy was proposed by introducing an additive with a strong electron-withdrawing group and significant steric hindrance-isosorbide dinitrate(ISDN),reconstructing the solvation structure and solid electrolyte interphase(SEI),enabling highly stable and efficient lithium metal batteries.We found that ISDN can strengthen the interaction between Li+and the anions of lithium salts and weaken the interaction between Li+and the solvent in the solvation structure.It promotes the formation of a LiF-rich and LiNxOy-rich SEI layer,enhancing the uniformity and compactness of Li deposition and inhibiting solvent decomposition,which effectively expands the electrochemical window to 4.8 V.The optimized Li‖Li cells offer stable cycling over 1000 h with an overpotential of only 57.7 mV at 1 mA cm-2.Significantly,Li‖3.7 mA h LiFePO4cells retain 108.3%of initial capacity after 546 cycles at a rate of 3 C.Under high-loading conditions(Li‖4.9 mA h LiNi0.8Co0.1Mn0.1O2full cells)and a cutoff voltage of 4.5 V,the ISDN-containing electrolyte enables stable cycling for 140 cycles.This study leverages steric hindrance and electron-withdrawing effect to synergistically reconstruct the Li+solvation structure and promote stable SEI formation,establishing a novel electrolyte paradigm for high-energy lithium metal batteries. 展开更多
关键词 Electrolyte additives Steric-electronic synergy Dual-function optimization Solvation structure Solid electrolyte interphase Lithium metal anodes
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Architectural Design and Additive Manufacturing of Mechanical Metamaterials:A Review 认领 引用 被引量：13
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作者 Chenxi Lu Mengting Hsieh +5 位作者 Zhifeng Huang Chi Zhang Yaojun Lin Qiang Shen Fei Chen Lianmeng Zhang 《Engineering》 SCIE EI CAS CSCD 2022年第10期44-63,共20页
Mechanical metamaterials can be defined as a class of architected materials that exhibit unprecedented mechanical properties derived from designed artificial architectures rather than their constituent materials.While... Mechanical metamaterials can be defined as a class of architected materials that exhibit unprecedented mechanical properties derived from designed artificial architectures rather than their constituent materials.While macroscale and simple layouts can be realized by conventional top-down manufacturing approaches,many of the sophisticated designs at various length scales remain elusive,due to the lack of adequate manufacturing methods.Recent progress in additive manufacturing(AM)has led to the realization of a myriad of novel metamaterial concepts.AM methods capable of fabricating microscale architectures with high resolution,arbitrary complexity,and high feature fidelity have enabled the rapid development of architected meta materials and drastically reduced the design-computation and experimental-validation cycle.This paper first provides a detailed review of various topologies based on the desired mechanical properties,including stiff,strong,and auxetic(negative Poisson’s ratio)metamaterials,followed by a discussion of the AM technologies capable of fabricating these metamaterials.Finally,we discuss current challenges and recommend future directions for AM and mechanical metamaterials. 展开更多
关键词 Mechanical metamaterials Auxetic materials Architectural design Additive manufacturing
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Design for Ti-Al-V-Mo-Nb alloys for laser additive manufacturing based on a cluster model and on their microstructure and properties 认领 引用 被引量：10
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作者 Tian-yu Liu Zhi-hao Zhu +2 位作者 Shuang Zhang Xiao-hua Min Chuang Dong 《China Foundry》 SCIE CAS CSCD 2021年第4期424-432,共9页
In this study,α+βTi-Al-V-Mo-Nb alloys with the addition of multiple elements that are suitable for laser additive manufacturing(LAM)were designed according to a Ti-6Al-4V cluster formula.This formula can be expresse... In this study,α+βTi-Al-V-Mo-Nb alloys with the addition of multiple elements that are suitable for laser additive manufacturing(LAM)were designed according to a Ti-6Al-4V cluster formula.This formula can be expressed as 12[Al-Ti12](AlTi2)+5[Al-Ti14]((Mo,V,Nb)2Ti),in which Mo and Nb were added into the alloys partially instead of V to give alloys with nominal compositions of Ti-6.01Al-3.13V-1.43Nb,Ti-5.97Al-2.33V-2.93Mo,and Ti-5.97Al-2.33V-2.20Mo-0.71Nb(wt.%).The microstructures and mechanical properties of the as-deposited and heat-treated samples prepared via LAM were examined.The sizes of theβcolumnar grains andαlaths in the Nb-containing samples are found to be larger than those of the Ti-6Al-4V alloy,whereas Mo-or Mo/Nb-added alloys contain finer grains.It indicates that Nb gives rise to coarsenedβcolumnar grains andαlaths,while Mo significantly refines them.Furthermore,the single addition of Nb improves the elongation,whereas the single addition of Mo enhances the strength of the alloys.The simultaneous addition of Mo/Nb significantly improves the comprehensive mechanical properties of the alloys,leading to the best properties with an ultimate tensile strength of 1,070 MPa,a yield strength of 1,004 MPa,an elongation of 9%,and micro-hardness of 355 HV.The fracture modes of all the alloys are ductile-brittle mixed fracture. 展开更多
关键词 titanium alloy laser additive manufacturing cluster-plus-glue-atom model composition design microstructure mechanical properties
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Additive manufacturing of porous magnesium alloys for biodegradable orthopedic implants:Process,design,and modification 认领 引用 被引量：11
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作者 Bo Peng Haojing Xu +3 位作者 Fei Song Peng Wen Yun Tian Yufeng Zheng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第15期79-110,共32页
Biodegradable magnesium(Mg)alloys exhibit excellent biocompatibility,adequate mechanical properties,and osteogenic effect.They can contribute to complete recovery of damaged tissues without concerns about a second sur... Biodegradable magnesium(Mg)alloys exhibit excellent biocompatibility,adequate mechanical properties,and osteogenic effect.They can contribute to complete recovery of damaged tissues without concerns about a second surgery and have achieved clinical applications in orthopedic and cardiovascular fields.Porous scaffolds can provide functions such as bone integration and adjustable mechanical properties,thus widely used for bone repair.Additive manufacturing(AM)offers the advantages of design freedom and high precision,enabling the reliable production of porous scaffolds with customized structures.The combination of biodegradable Mg alloys,porous scaffolds,and AM processes has created tremendous opportunities for the precision treatment of bone defects.This article reviews the current development in the additive manufacturing process and design of Mg alloy biodegradable orthopedic implants,fo-cusing on chemical compositions,structural design,surface treatment,and their effects on mechanical properties,degradation behavior,and biocompatibility.Finally,the future perspective of porous Mg alloy biodegradable orthopedic implants is proposed. 展开更多
关键词 Biodegradable magnesium alloys Additive manufacturing Laser powder bed fusion Orthopedic implants Porous structure design Degradation behavior
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