Additive manufacturing letters最新文献_第8页

Strategies for a scalable multi-robot large scale wire arc additive manufacturing system 一种可扩展的多机器人大型电弧增材制造系统策略

Additive manufacturing letters Pub Date : 2023-11-18 DOI: 10.1016/j.addlet.2023.100183

Alex Arbogast , Andrzej Nycz , Mark W. Noakes , Peter Wang , Christopher Masuo , Joshua Vaughan , Lonnie Love , Randall Lind , William Carter , Luke Meyer , Derek Vaughan , Alex Walters , Steven Patrick , Jonathan Paul , Jason Flamm

{"title":"Strategies for a scalable multi-robot large scale wire arc additive manufacturing system","authors":"Alex Arbogast , Andrzej Nycz , Mark W. Noakes , Peter Wang , Christopher Masuo , Joshua Vaughan , Lonnie Love , Randall Lind , William Carter , Luke Meyer , Derek Vaughan , Alex Walters , Steven Patrick , Jonathan Paul , Jason Flamm","doi":"10.1016/j.addlet.2023.100183","DOIUrl":"https://doi.org/10.1016/j.addlet.2023.100183","url":null,"abstract":"<div><p>Conventional robotic wire arc additive manufacturing technologies enable the rapid production of moderate-sized components using low-cost wire feedstocks and robotic welding systems. Efforts to date have primarily focused on single robot solutions. However, new configurations are possible with coordination of multiple robots and multi-degree of freedom positioners. This paper describes a new multi-agent control paradigm that enables multiple robots to work collaboratively on manufacturing a single component on a rotating platform. The advantages of this approach are increased deposition rate and productivity. This paper demonstrates this control strategy on a 19 degrees-of-freedom platform based on three wire arc additive systems surrounding a single rotating platform.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"8 ","pages":"Article 100183"},"PeriodicalIF":0.0,"publicationDate":"2023-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369023000634/pdfft?md5=0a74dc0535089d8d5a10b8c2726a76e0&pid=1-s2.0-S2772369023000634-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138436766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of conductive structures in volumetric additive manufacturing through embedded 3-D printing for electronic applications 基于嵌入式3d打印的导电结构在体积增材制造中的应用

Additive manufacturing letters Pub Date : 2023-10-24 DOI: 10.1016/j.addlet.2023.100178

Anders Frem Wolstrup , Jonathan Thorbjørn Dagnæs-Hansen , Oskar Vitus Brandt , Daniel Helmuth Meile , Carl Sander Kruse , Jon Spangenberg , Tiberiu Gabriel Zsurzsan

{"title":"Fabrication of conductive structures in volumetric additive manufacturing through embedded 3-D printing for electronic applications","authors":"Anders Frem Wolstrup , Jonathan Thorbjørn Dagnæs-Hansen , Oskar Vitus Brandt , Daniel Helmuth Meile , Carl Sander Kruse , Jon Spangenberg , Tiberiu Gabriel Zsurzsan","doi":"10.1016/j.addlet.2023.100178","DOIUrl":"https://doi.org/10.1016/j.addlet.2023.100178","url":null,"abstract":"<div><p>This study investigates the fabrication of conductive structures for electronics applications using embedded 3-D printing coupled with Volumetric Additive Manufacturing (VAM). Electrically conductive carbon grease was suspended within a resin matrix, and the samples underwent VAM printing and post-processing. The resulting three dimensional conductive structure was measured to have a resistance of 4.5 kΩ, corresponding well with the material specifications. The results showed the importance of complete encapsulation of the conductive material within the resin to preserve the conductive structure. The resistivity of the conductive grease remained unaffected, indicating no interaction with the resin. Potential enhancements to improve the structure's fidelity and broaden its range of applications is discussed. This research highlights the potential of embedded 3-D printing for fabricating conductive structures in VAM. The fabrication method allows for unprecedented avenues in developing electronic applications, such as smart sensing, smart drug delivery and cyborganics.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"7 ","pages":"Article 100178"},"PeriodicalIF":0.0,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369023000580/pdfft?md5=0525658ec9d9ec3dec226dade8c39716&pid=1-s2.0-S2772369023000580-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92047087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of layer thickness, and laser energy density on the recrystallization behavior of additively manufactured Hastelloy X by laser powder bed fusion 层厚和激光能量密度对激光粉末床熔合增材制造哈氏合金X再结晶行为的影响

Additive manufacturing letters Pub Date : 2023-10-19 DOI: 10.1016/j.addlet.2023.100182

Faraz Deirmina , Olutayo Adegoke , Matteo Del Col , Massimo Pellizzari

引用次数: 0

Improvement of powder fabrication for additive manufacturing using ultrafine bubbles 超细气泡增材制造粉末工艺的改进

Additive manufacturing letters Pub Date : 2023-10-18 DOI: 10.1016/j.addlet.2023.100181

Suxia Guo , Zhenxing Zhou , Mingqi Dong , Weiwei Zhou , Naoyuki Nomura

{"title":"Improvement of powder fabrication for additive manufacturing using ultrafine bubbles","authors":"Suxia Guo , Zhenxing Zhou , Mingqi Dong , Weiwei Zhou , Naoyuki Nomura","doi":"10.1016/j.addlet.2023.100181","DOIUrl":"https://doi.org/10.1016/j.addlet.2023.100181","url":null,"abstract":"<div><p>Freeze-dry pulsated orifice ejection method (FD-POEM) shows great potential in producing spherical refractory or multi-component alloy powders. However, addressing the dispersibility issue of high-concentration slurries is required to broaden the application scope of FD-POEM in additive manufacturing. To this end, this study proposes the use of ultrafine bubble (UFB) water as an economical additive to improve slurry dispersibility without introducing impurities. A refractory MoSiBTiC alloy with complex compositions was chosen as an example to demonstrate the effect of UFBs on the dispersibility of the slurry mixture and the morphology of the FD-POEM powders. The underlying mechanism of the improved slurry dispersibility was elucidated through calculations of repulsive forces. Consequently, the operational range for the FD-POEM process was significantly expanded from 10 to 20 % when using UFB water. In addition, the MoSiBTiC alloy build was fabricated via laser powder bed fusion (L-PBF) using FD-POEM-produced powders with UFB additives, exhibiting uniform dendrites and fine TiC nanoparticles distributed in the matrix. This study not only expands the potential applications of UFB water in powder fabrication but also paves the way for the processability of Mo-based parts with advanced microstructures by combining FD-POEM with <span>L</span>-PBF.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"7 ","pages":"Article 100181"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369023000610/pdfft?md5=363decd29ca74896ac2a269dbe737d9a&pid=1-s2.0-S2772369023000610-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92047088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of the beam shape and process parameters on bead geometry in WLAM WLAM中梁形及工艺参数对焊缝几何形状的影响

Additive manufacturing letters Pub Date : 2023-10-15 DOI: 10.1016/j.addlet.2023.100180

Pierre Lapouge, Nora Hayrant, Frédéric Coste

引用次数: 0

Local composition control using an active-mixing hotend in fused filament fabrication 在熔丝制造中使用主动混合加热器的局部成分控制

Additive manufacturing letters Pub Date : 2023-10-13 DOI: 10.1016/j.addlet.2023.100177

Joshua T. Green , Ian A. Rybak , Jonathan J. Slager , Mauricio Lopez , Zachary Chanoi , Calvin M. Stewart , Roger V. Gonzalez

{"title":"Local composition control using an active-mixing hotend in fused filament fabrication","authors":"Joshua T. Green , Ian A. Rybak , Jonathan J. Slager , Mauricio Lopez , Zachary Chanoi , Calvin M. Stewart , Roger V. Gonzalez","doi":"10.1016/j.addlet.2023.100177","DOIUrl":"https://doi.org/10.1016/j.addlet.2023.100177","url":null,"abstract":"<div><p>Additive manufacturing with local composition control is uniquely suited for the development and exploration of advanced materials with compositionally graded structures. A fused filament fabrication printer was designed with in situ composition control facilitated by using an active-mixing hotend. Stepper motors drive three filament extruders and a mixing rod in proportions instructed by a print file to control composition and material distribution within extrusions. Composition tailoring was demonstrated by printing specimens with twelve distinct regions each consisting of unique filament mixtures. Local control of composition was demonstrated by printing a variety of specimens with composition gradients having horizontal, vertical, radial, and circumferential orientations. The tensile properties of printed materials were modified by printing with mix ratios of polylactic acid and thermoplastic polyurethane. Eight blend ratios were tested in tension and have tensile moduli ranging from 17.3 to 3480 MPa. These methods demonstrate advanced capabilities that are well suited for manufacturing functionally graded structures.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"7 ","pages":"Article 100177"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49751534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Mechanical properties of stochastically cracked soft magnetic material 随机裂纹软磁材料的力学性能

Additive manufacturing letters Pub Date : 2023-10-13 DOI: 10.1016/j.addlet.2023.100179

Alexander D. Goodall , Jared Uramowski , Chad W Sinclair , Lova Chechik , Iain Todd

{"title":"Mechanical properties of stochastically cracked soft magnetic material","authors":"Alexander D. Goodall , Jared Uramowski , Chad W Sinclair , Lova Chechik , Iain Todd","doi":"10.1016/j.addlet.2023.100179","DOIUrl":"https://doi.org/10.1016/j.addlet.2023.100179","url":null,"abstract":"<div><p>Processing of soft magnetic materials with additive manufacturing has shown capability to deliver good magnetic properties and increased silicon content of Fe-6.5 wt%Si, however methods must be used to reduce the eddy currents in large bulk cross-sections in components created by additive manufacturing. Geometrical design has been shown to do this effectively, however stochastically cracked parts show similar magnetic performance with a large increase in stacking factor. To enable their use in electrical machines the mechanical properties of this material must be understood. Therefore, this study uses uniaxial tensile testing to understand the mechanical performance. The ultimate tensile strength of the material in the as-built condition was 17.9 MPa (σ = 4.5 MPa), which was improved by 40% to 25.5 MPa (σ = 5.7 MPa) by infiltrating the cracks with a low viscosity resin. This brings the material strength to more than three standard deviations from the required strength of 7 MPa to be used in a specific axial flux machine. The material exhibited an elongation to failure of 8-10%, showing that the suppression of ordered phases by high cooling rates has improved the ductility of the material. Hence, the stochastically cracked parts have sufficient properties to be used in the 3D magnetic circuits of electrical machines.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"7 ","pages":"Article 100179"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49751251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the development of twinning-induced plasticity in additively manufactured 316L stainless steel 增材制造316L不锈钢孪晶诱导塑性研究进展

Additive manufacturing letters Pub Date : 2023-10-11 DOI: 10.1016/j.addlet.2023.100176

D. Della Crociata, I. Maskery, R. Hague, M. Simonelli

引用次数: 0

Disorder-order transformation in Fe-50 %Co fabricated via laser powder bed fusion 激光粉末床熔合制备fe - 50% Co的无序-有序相变

Additive manufacturing letters Pub Date : 2023-09-27 DOI: 10.1016/j.addlet.2023.100174

Peeyush Nandwana , Chris M. Fancher , Rangasayee Kannan , Tomas F. Babuska , Brandon Krick , Andrew B. Kustas

引用次数: 0

Fatigue performance of U-notched additively manufactured AlSi10Mg parts: The effects of chemical and thermal post-treatments u形缺口增材制造AlSi10Mg零件的疲劳性能:化学和热后处理的影响

Additive manufacturing letters Pub Date : 2023-09-27 DOI: 10.1016/j.addlet.2023.100175

Erfan Maleki , Sara Bagherifard , Nabeel Ahmad , Shuai Shao , Okan Unal , Mario Guagliano , Nima Shamsaei

{"title":"Fatigue performance of U-notched additively manufactured AlSi10Mg parts: The effects of chemical and thermal post-treatments","authors":"Erfan Maleki , Sara Bagherifard , Nabeel Ahmad , Shuai Shao , Okan Unal , Mario Guagliano , Nima Shamsaei","doi":"10.1016/j.addlet.2023.100175","DOIUrl":"https://doi.org/10.1016/j.addlet.2023.100175","url":null,"abstract":"<div><p>In the current study, the effects of different post-processing methods, including heat treatment (HT) and electro-chemical polishing (ECP) as well as their combination on the surface texture, porosity, microstructure, mechanical properties, and rotating bending fatigue behavior of U-notched laser powder bed fused AlSi10Mg specimens were comprehensively investigated. In addition, to better understand the effects of the applied post-processing methods on the sensitivity of the notched specimen to surface and near-surface defects, finite element analysis was performed. Chemical treatment was found to be very influential on surface texture modification of the very narrow notched parts, for which the application of other treatments can be quite challenging. It was also found that the fatigue behavior of the notched specimens was more sensitive to the surface texture rather than to the near-surface defects. The hybrid treatment involving HT+ECP was the most effective for fatigue behavior improvement due to simultaneous homogenization of the microstructure, released tensile residual stresses, enhanced ductility and high surface texture modification.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"7 ","pages":"Article 100175"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49727294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0