Additive manufacturing最新文献

Influence of anisotropic microstructure on chip formation mechanism in additively manufactured Ti6Al4V 各向异性组织对增材制造Ti6Al4V晶片形成机制的影响

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-13 DOI: 10.1016/j.addma.2025.104813

Xinyu Zhou, Fangyuan Zhang, Zhian Lin, Yabin Liu, Yutao Chen

{"title":"Influence of anisotropic microstructure on chip formation mechanism in additively manufactured Ti6Al4V","authors":"Xinyu Zhou, Fangyuan Zhang, Zhian Lin, Yabin Liu, Yutao Chen","doi":"10.1016/j.addma.2025.104813","DOIUrl":"10.1016/j.addma.2025.104813","url":null,"abstract":"<div><div>Integrating machining and additive manufacturing (AM) can improve the machining quality of titanium alloy components. However, the anisotropic characteristics of the microstructure in AM titanium alloys significantly affect chip morphology, which influences the vibrations in the cutting process, resulting in lower machining quality than isotropic materials. Therefore, this study explores the effects of the anisotropic microstructure on the chip formation mechanisms of AM Ti6Al4V. The morphology and microstructure of the chips and the Adiabatic Shear Bands (ASBs) were observed, and the crystal orientation and grain size of the chips and those near the ASBs were discussed. The results demonstrate that the microstructure type, texture, grain size, and grain boundary of the AM Ti6Al4V cause the bending and bifurcation of the ASBs, and the chip morphology depends on the slip path of the ASBs. Widmanstätten and the pyramidal slip system are more susceptible to dislocation movement and ASB slip; the large grains decrease the critical resolved shear stress of the slip system, which is more conducive to shear slip; the grain boundaries along the columnar crystals are prone to shear slip and crack propagation, leading to the bending of ASB and unusual chip morphology. As the cutting speed increases, the effects of the anisotropic microstructure on the chip formation become more significant, leading to more complex chip morphology. This research, for the first time, discovered the influence of anisotropic microstructures on adiabatic shear bands and chip morphology by analyzing the crystal orientation and grain morphology within the chips. The findings can help reduce cutting vibrations and tool wear, thereby improving the cutting quality of AM Ti6Al4V.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104813"},"PeriodicalIF":10.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-process density measurement for model-based process optimization of functionally graded foam microcellular structures in material extrusion additive manufacturing 材料挤压增材制造中基于模型的功能梯度泡沫微孔结构工艺优化过程密度测量

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-13 DOI: 10.1016/j.addma.2025.104817

Donghua Zhao , Zhaowei Zhou , Kaicheng Ruan , Xuguang Xu , Guoquan Zhang , Ziwen Chen , Kui Wang , Yi Xiong

{"title":"In-process density measurement for model-based process optimization of functionally graded foam microcellular structures in material extrusion additive manufacturing","authors":"Donghua Zhao , Zhaowei Zhou , Kaicheng Ruan , Xuguang Xu , Guoquan Zhang , Ziwen Chen , Kui Wang , Yi Xiong","doi":"10.1016/j.addma.2025.104817","DOIUrl":"10.1016/j.addma.2025.104817","url":null,"abstract":"<div><div>Additive manufacturing with in-process foaming enables the creation of complex, porous structures with graded density and porosity. However, the current process planning method, based on volume conservation principles, fails to accurately capture the nonlinear process-density relationship, thereby limiting the precision of density control. Herein, this study proposes a model-based process optimization approach that utilizes a non-contact in-process density measurement method, enabling optimization of both density and track width. First, this approach accelerates data collection and constructs a reliable process-density and process-width regression model, facilitating rapid process optimization of functionally graded foam. Then, the model captures the nonlinear effects of temperature and printing speed on thermally expandable microspheres, where high temperatures and low speeds promote foaming, and vice versa. Finally, foam samples with gradient densities, produced using optimized parameters, validate the regression model's accuracy and feasibility for customizing intralayer and interlayer density, investigating continuous density gradients, and pressure distribution-driven insoles. Generally, the results highlight the critical role of temperature and printing speed in determining foam density and microstructure, significantly advancing high-quality, controlled-density foam production via material extrusion additive manufacturing. Moreover, the study presents a framework for in-situ, in-process density measurement, aiding the rapid development of process parameter windows for density-variable novel materials based on mass conservation.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104817"},"PeriodicalIF":10.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Process research of the powder bed-based 5-axis additive/subtractive hybrid manufacturing for internal features 基于粉末床的五轴内件增减混合制造工艺研究

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-12 DOI: 10.1016/j.addma.2025.104812

Yukai Chen, Yin Wang, Yu Lu, Yuxuan Jiang, Ke Huang, Bin Han, Qi Zhang

{"title":"Process research of the powder bed-based 5-axis additive/subtractive hybrid manufacturing for internal features","authors":"Yukai Chen, Yin Wang, Yu Lu, Yuxuan Jiang, Ke Huang, Bin Han, Qi Zhang","doi":"10.1016/j.addma.2025.104812","DOIUrl":"10.1016/j.addma.2025.104812","url":null,"abstract":"<div><div>Additive/subtractive hybrid manufacturing (ASHM) has emerged as a promising solution to overcome the surface roughness and dimensional accuracy issues commonly encountered in the traditional additive manufacturing (AM) process. Particularly, when processing complex internal features using laser powder bed fusion (L-PBF), there are limitations in the existing powder bed-based (PB-based) ASHM processes. Therefore, this study developed a novel PB-based 5-axis ASHM system to address the challenges. The PB-based 5-axis ASHM process was proposed and validated through in situ manufacturing of internal cavity and internal channel features by using Inconel 718. The results demonstrated significant improvements in surface quality, with a reduction in surface roughness to below Ra 0.8 μm, a 77.5 % increase in dimensional accuracy, and closure of surface pore defects. The study further explored the comprehensive effects of the PB-based ASHM process on microstructure and mechanical performance, revealing the formation of low-angle grain boundaries (LAGBs) caused by side milling process and lack-of-fusion (LOF) defects resulting from interval AM process. The results showed that the hybrid process enhanced strength and surface hardness but significantly reduced elongation of the material, with optimal performance observed in specimens determined by AM matrix and process alternation frequency at small-cutting-volume conditions. Additionally, the impacts of milling chips on the PB-based ASHM process for parts with minimal cross-sectional variation were demonstrated to be controllable in this study. Overall, the PB-based 5-axis ASHM system development and process research offer a promising approach to manufacturing more kinds of complex internal features, contributing to the wider application in the future.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104812"},"PeriodicalIF":10.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser powder bed fusion of difficult-to-print γ′ Ni-based superalloys: A review of processing approaches, properties, and remaining challenges 难打印γ′ni基高温合金的激光粉末床熔合：加工方法、性能和仍然存在的挑战综述

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-11 DOI: 10.1016/j.addma.2025.104811

Pablo D. Enrique, Tatevik Minasyan, Ehsan Toyserkani

{"title":"Laser powder bed fusion of difficult-to-print γ′ Ni-based superalloys: A review of processing approaches, properties, and remaining challenges","authors":"Pablo D. Enrique, Tatevik Minasyan, Ehsan Toyserkani","doi":"10.1016/j.addma.2025.104811","DOIUrl":"10.1016/j.addma.2025.104811","url":null,"abstract":"<div><div>Metal additive manufacturing (AM) promises a revolution with the potential to fabricate more complex, lighter, and higher performance components while simplifying supply chains and reducing material waste. However, many of the superalloys that are critical to applications requiring superior high-temperature properties are also challenging to process using fusion-based AM. The number of publications on this topic has grown significantly in the past five years, reflecting a growing interest within industry and academia. This article reviews and discusses the challenges associated with powder bed fusion - laser beam (PBF-LB) of γ′ Ni-based superalloys and recent approaches that have enabled their processing. This includes process parameter optimization, alloy modification, and heat treatment, all of which have been shown to produce material with reduced defect density. Additionally, the properties of γ′ Ni-based superalloys made with PBF-LB and conventional (cast and wrought) processes are compared and the reasons for the observed differences are discussed. Current and future research trends are provided based on the current outstanding challenges and prevailing theories in the literature, as well as an outlook on the adoption of PBF-LB γ′ Ni-based superalloys in industry.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104811"},"PeriodicalIF":10.3,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterizing gas flow in the build chamber of laser powder bed fusion systems utilizing particle image velocimetry: A path to improvements 利用粒子图像测速技术表征激光粉末床融合系统构建室中的气体流动：改进之路

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-10 DOI: 10.1016/j.addma.2025.104810

Aaron Abeyta , Cole Nouwens , Ashley M. Jones , Troy A. Haworth , Alex Montelione , Mamidala Ramulu , Dwayne Arola

{"title":"Characterizing gas flow in the build chamber of laser powder bed fusion systems utilizing particle image velocimetry: A path to improvements","authors":"Aaron Abeyta , Cole Nouwens , Ashley M. Jones , Troy A. Haworth , Alex Montelione , Mamidala Ramulu , Dwayne Arola","doi":"10.1016/j.addma.2025.104810","DOIUrl":"10.1016/j.addma.2025.104810","url":null,"abstract":"<div><div>Laser Powder Bed Fusion (L-PBF) is increasingly being utilized for the manufacture of structural components for the aerospace industry. In L-PBF an inert gas is used to protect the melt pool from contamination by reactive elements in the build chamber and to carry away by-products generated by the laser-powder interaction, including soot, condensate, etc. Spatial variations or other undesirable characteristics (e.g., turbulence, dead zones, etc.) in the gas flow distribution could enable build defects to develop that cause spatial variability in metal quality and microstructure, as well as variability in the mechanical properties. This investigation analyzed the gas flow in a full-scale model of the build chamber for a commercial system utilizing high-fidelity Particle Image Velocimetry (PIV). Planar mode views showed that the gas flow within the build chamber is not uniform and that the flow distribution across the build plate undergoes a reduction in velocity laterally of nearly 50 %; the reduction in flow downstream from the gas inlet to the exit reaches nearly 70 %. Serial views involving multiple planes of evaluation revealed regions of stagnation as well as recirculation zones that could entrain soot and metal vapor condensate. Lastly, a modified Y-Duct design is conceived and shown through analysis performed using PIV to substantially improve the flow field distribution across the build plate. Details of the flow fields, locations of concern, and benefits of the PIV approach to assess and inform improvements in the gas flow distribution are discussed. These findings can lead to improvements in quality realized by part placement and distinguish opportunities for further tuning of the gas flow overall.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104810"},"PeriodicalIF":10.3,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlating the evolution of spatial-resolved microscale residual stress and the associated dislocation behavior in additively manufactured 316L stainless steel upon short-term annealing 增材制造316L不锈钢短期退火后空间分辨微尺度残余应力演变与位错行为的关系

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-09 DOI: 10.1016/j.addma.2025.104807

Dayong An , Xinxi Liu , Yao Xiao , Xifeng Li , Jun Chen

{"title":"Correlating the evolution of spatial-resolved microscale residual stress and the associated dislocation behavior in additively manufactured 316L stainless steel upon short-term annealing","authors":"Dayong An , Xinxi Liu , Yao Xiao , Xifeng Li , Jun Chen","doi":"10.1016/j.addma.2025.104807","DOIUrl":"10.1016/j.addma.2025.104807","url":null,"abstract":"<div><div>Additive manufacturing (AM) processes, such as laser powder bed fusion (L-PBF), <em>often</em> introduce significant residual stresses in components, which are typically mitigated through heat treatments (HTs) to optimize mechanical properties. However, the evolution of microscale residual stresses during annealing and their underlying mechanisms remain poorly understood. In this study, we employed quasi <em>in-situ</em> electron channeling contrast imaging (ECCI) combined with cross-correlation electron backscatter diffraction (CC-EBSD) to track the spatially resolved evolution of microscale residual stresses and associated dislocation behaviors in a L-PBF fabricated 316L stainless steel upon annealing. A direct correlation is established between dislocation arrangements within dislocation cells and sub-grain boundaries (SGBs) and the distribution of microscale residual stresses. Our results reveal that dislocation activity is modulated by the presence of these microscale residual stresses, which, subsequently, dictate their redistribution during annealing. Furthermore, the influence of different HTs on governing deformation mechanisms and microscale residual stress evolution under plastic deformation is quantitatively estimated. This work provides new insights into the intricate interplay between dislocation dynamics and microscale residual stress evolution during annealing, with implications for optimizing the mechanical properties of AM components.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104807"},"PeriodicalIF":10.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-speed imaging investigation and process mapping of the plume behavior in laser powder bed fusion 激光粉末床熔合中羽流行为的高速成像研究和过程映射

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-09 DOI: 10.1016/j.addma.2025.104797

Alexander J. Myers, Christian Gobert, Jack L. Beuth, Jonathan A. Malen

{"title":"High-speed imaging investigation and process mapping of the plume behavior in laser powder bed fusion","authors":"Alexander J. Myers, Christian Gobert, Jack L. Beuth, Jonathan A. Malen","doi":"10.1016/j.addma.2025.104797","DOIUrl":"10.1016/j.addma.2025.104797","url":null,"abstract":"<div><div>In this work, high-speed imaging of experiments was conducted with varied processing conditions and materials to parametrically understand the plume’s severity, size, and trajectory on a commercial laser powder bed fusion (LPBF) machine. In this context, the plume refers to the bright melt-pool-scale metal vapor and condensate. A U-Net convolutional neural network (CNN) was trained to segment the plume from experimental images. A comparison of the plume generated from different metals shows that Ti-6Al-4V has a significantly brighter and larger plume than Inconel 718 and 316L SS, which may be attributed to increased emission from the melt pool, increased scattering of the emission from the melt pool, or elemental emission lines. The effect of powder was studied for both Ti-6Al-4V and 316L SS and shows a reduction in the size and brightness of the plume in most overhead images, suggesting that the plume visibility and/or the plume itself is suppressed by the powder and spatter. Process mapping the plume in power and scanning velocity space shows that the plume transitions from ejecting toward the rear of the melt pool in the transitional regime to ejecting directly above the melt pool in both the severe keyholing and conduction-dominated regimes, consistent with the vapor depression geometry under the laser. The temporal variability of the plume increases with increasing power-to-velocity ratio, which is attributed to melt pool and vapor depression instability, but can also be large at very low power-to-velocity ratios. This experimental study aims to increase our understanding of the plume’s behavior at the melt pool scale in LPBF and can be used to validate multi-physics models of the plume and inform parameter selection for both minimal melt-pool-scale laser-plume interaction and avoiding plume interference in melt pool imaging.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104797"},"PeriodicalIF":10.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advances in 3D printed electromechanical sensors: Performance comparison, trends, and future directions 3D打印机电传感器的进展：性能比较、趋势和未来方向

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-08 DOI: 10.1016/j.addma.2025.104799

Anders Frem Wolstrup , Jon Spangenberg , Akio Yamamoto , Andrew Gleadall , Gabriel Zsurzsan

{"title":"Advances in 3D printed electromechanical sensors: Performance comparison, trends, and future directions","authors":"Anders Frem Wolstrup , Jon Spangenberg , Akio Yamamoto , Andrew Gleadall , Gabriel Zsurzsan","doi":"10.1016/j.addma.2025.104799","DOIUrl":"10.1016/j.addma.2025.104799","url":null,"abstract":"<div><div>3D printing has revolutionized electromechanical sensor design, enabling rapid prototyping and complex geometries, and driving significant growth in this research field. However, as more sensors are developed using diverse printing methods and sensing mechanisms, the need for standardized reporting and comparative metrics becomes increasingly critical. Without such metrics, new sensors cannot be properly contextualized or benchmarked against the state of the art, slowing progress in the field. This review addresses this gap by cataloguing key performance metrics from the literature, including input/output range, sensitivity, mechanical and electrical properties, and the specific 3D printing processes used, to enable meaningful comparison. These metrics are applied to quantitatively analyze 74 sensors reported across different additive manufacturing techniques. Additionally, underreported characteristics such as hysteresis, drift, and long-term stability are considered to provide a more complete assessment of sensor performance. Beyond quantitative comparison, this review introduces a framework for categorizing sensors based not only on electrical output type (e.g., resistive, capacitive) but also on the underlying sensing basis, distinguishing whether the response arises from intrinsic material properties (e.g., quantum tunneling, percolation) or from structure-induced mechanisms (e.g., constriction resistance). The review also highlights advances in 3D printing for electronics manufacturing to inspire future directions and concludes with six recommendations for sensor development, focusing on aligning sensing mechanisms with appropriate fabrication strategies and aiding metric standardization across the field.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104799"},"PeriodicalIF":10.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding drying dynamics in Binder Jetting: Development of a physical model for improved selection of drying parameters and better control of binder saturation 了解粘结剂喷射干燥动力学：发展物理模型，以改进干燥参数的选择和更好地控制粘结剂饱和度

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-08 DOI: 10.1016/j.addma.2025.104798

Thomas Cheny , Christophe Colin , Sylvain Gailliègue , Paul Calves , Benoit Verquin

{"title":"Understanding drying dynamics in Binder Jetting: Development of a physical model for improved selection of drying parameters and better control of binder saturation","authors":"Thomas Cheny , Christophe Colin , Sylvain Gailliègue , Paul Calves , Benoit Verquin","doi":"10.1016/j.addma.2025.104798","DOIUrl":"10.1016/j.addma.2025.104798","url":null,"abstract":"<div><div>Binder Jetting is a layer-by-layer 3D printing process that consists of selectively binding particles together on each layer to create 2D patterns of a part. A drying step is usually performed after printing to evaporate some of the binder solvents before the next layer is applied. However, optimization of binder drying for improved part manufacturing has received little attention. In this paper, a dedicated test bench was used to measure binder mass loss over time under various drying conditions. By establishing a methodology and an experimentally validated drying model, this work represents a significant advance in the understanding of the drying phase and binder behavior between the deposition of successive layers. A time-dependent conceptualization of binder saturation within a layer of powder is presented for the first time, and valuable insights are provided to pave the way for improved selection of printing and drying parameters for aqueous binders in Binder Jetting.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104798"},"PeriodicalIF":10.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sequential-crosslinking facilitated droplet-droplet collision inkjet 3D printing of soft biomaterials 顺序交联促进了软质生物材料的液滴碰撞喷墨3D打印

IF 10.3 1区工程技术

Additive manufacturing Pub Date : 2025-05-07 DOI: 10.1016/j.addma.2025.104809

Dengke Zhao , Heqi Xu , Zhichao Ye , Jianing Yan , Huayong Yang , Yifan Wang , Jun Yin

{"title":"Sequential-crosslinking facilitated droplet-droplet collision inkjet 3D printing of soft biomaterials","authors":"Dengke Zhao , Heqi Xu , Zhichao Ye , Jianing Yan , Huayong Yang , Yifan Wang , Jun Yin","doi":"10.1016/j.addma.2025.104809","DOIUrl":"10.1016/j.addma.2025.104809","url":null,"abstract":"<div><div>Droplet-droplet collision (DDC) inkjet three-dimensional (3D) printing presents a novel approach to additive manufacturing (AM) of soft biomaterials for tissue engineering, bioelectronics, and food science, etc. However, limited ink materials and elusive dynamics of the printing process pose significant challenges. This work introduces a sequential-crosslinking facilitated printing strategy that leverages rapid ionic crosslinking triggered by in-air droplet collision to retain structure during printing and entrap the target biomaterial, which is further crosslinked after printing. This versatile approach enables the effective printing of both photocrosslinkable and non-photocrosslinkable soft biomaterials that are challenging to be printed with normal DDC inkjet 3D printing. The dynamics of DDC process with crosslinking is revealed and two distinct DDC modes are identified, namely, coalescence and stretching separation; dimensionless phase diagrams and semi-empirical transition boundaries of DDC modes are developed to improve the stability of printing process and guide the optimization of printing parameters. On this basis, lines exhibiting a minimum width of 122 μm and delicate motifs containing intricate microfeatures are printed. Moreover, the printing process has proved its biocompatibility by imposing negligible effect on the viability and proliferation of printed living cells. This study is believed to expedite the voxelated AM of broader soft biomaterials for healthcare and industry.</div></div>","PeriodicalId":7172,"journal":{"name":"Additive manufacturing","volume":"106 ","pages":"Article 104809"},"PeriodicalIF":10.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0