Additive manufacturing letters最新文献_第7页

Towards microwave volumetric additive manufacturing: Generation of a computational multi-physics model for localized curing 实现微波体积增材制造：生成局部固化的多物理场计算模型

Additive manufacturing letters Pub Date : 2024-04-24 DOI: 10.1016/j.addlet.2024.100209

Saptarshi Mukherjee, Johanna Schwartz, Emeraldo Baluyot, Tammy Chang, Joseph W. Tringe, Christopher M. Spadaccini, Maxim Shusteff

{"title":"Towards microwave volumetric additive manufacturing: Generation of a computational multi-physics model for localized curing","authors":"Saptarshi Mukherjee, Johanna Schwartz, Emeraldo Baluyot, Tammy Chang, Joseph W. Tringe, Christopher M. Spadaccini, Maxim Shusteff","doi":"10.1016/j.addlet.2024.100209","DOIUrl":"10.1016/j.addlet.2024.100209","url":null,"abstract":"<div><p>Visible light-based volumetric additive manufacturing (VAM) technology has recently enabled rapid 3D printing of optically transparent resins in a single step. There is now strong interest in extending the design space of VAM to include opaque, scattering and composite materials. Microwave energy can penetrate more deeply than visible light into a broader family of materials. For microwaves to be useful for VAM, however it is necessary to have a fundamental understanding of material dielectric properties, microwave field propagation and localization. Here we present a multi-physics microwave beam formed-thermal diffusion model that addresses these needs. The model demonstrates its ability to optimize power delivery and curing time to obtain better thermal control. We validate the model with a proof-of-concept single-antenna experimental system operating at 10 GHz that is able to cure a wide variety of materials, including both optically translucent and opaque epoxy resins loaded with conductive additives with a minimum curing spot of 5 mm. While available microwave hardware operating at 40 Watt power cures the resins in 2.5 min, the model estimates the ability to cure in as less as 6 s at 1 Kilowatt power levels. This computational model and experiments lay the foundation for a future multi-waveguide microwave-based VAM system.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"10 ","pages":"Article 100209"},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369024000185/pdfft?md5=7b4fe11a7295609c23c72d714fda3af6&pid=1-s2.0-S2772369024000185-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140762365","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

Additive manufacturing of NiTi architected metamaterials 镍钛结构超材料的快速成型制造

Additive manufacturing letters Pub Date : 2024-04-23 DOI: 10.1016/j.addlet.2024.100216

C.A. Biffi , C. Soyarslan , J. Fiocchi , C. Bregoli , A. du Plessis , A. Tuissi , M. Mehrpouya

{"title":"Additive manufacturing of NiTi architected metamaterials","authors":"C.A. Biffi , C. Soyarslan , J. Fiocchi , C. Bregoli , A. du Plessis , A. Tuissi , M. Mehrpouya","doi":"10.1016/j.addlet.2024.100216","DOIUrl":"10.1016/j.addlet.2024.100216","url":null,"abstract":"<div><p>Additive manufacturing has revolutionized the creation of complex and intrinsic structures, offering tailored designs for enhanced product performance across various applications. Architected cellular or lattice structures exemplify this innovation, customizable for specific mechanical or functional requirements, boasting advantages such as reduced mass, heightened load-bearing capabilities, and superior energy absorption. Nonetheless, their single-use limitation arises from plastic deformation resulting from localized yield damage or plastic buckling. Incorporating NiTi shape memory alloys (SMAs) presents a solution, enabling structures to recover their original shape post-unloading. In this study, an NiTi architected metastructure, featuring auxetic behavior and a negative Poisson's ratio, was designed and fabricated via laser powder bed fusion (LPBF). The samples exhibit promising superelastic performance with recoverable deformation strains at room temperature. Comprehensive characterization processes evaluated the functional performance of the fabricated metastructures. The metastructure geometry promoted microstructure formation primarily along the wall thickness. Cycling compression tests, conducted at three applied force levels, demonstrated stable cyclic behavior with up to 3.8 % reversible deformation strain, devoid of plastic buckling or yielding damage. Furthermore, the NiTi metastructures displayed robust energy absorption capacity and damping behavior, underscoring their potential for reusable energy dissipators in various industries including aerospace, automotive, construction, and etc.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"10 ","pages":"Article 100216"},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369024000252/pdfft?md5=becaff9c5c89736f5ba46208445a2866&pid=1-s2.0-S2772369024000252-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140774431","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

Optimizing LPBF-parameters by Box-Behnken design for printing crack-free and dense high-boron alloyed stainless steel parts 通过盒式贝肯设计优化 LPBF 参数，用于打印无裂纹、致密的高硼合金不锈钢零件

Additive manufacturing letters Pub Date : 2024-04-01 DOI: 10.1016/j.addlet.2024.100206

Brenda Juliet Martins Freitas , Guilherme Yuuki Koga , Siegfried Arneitz , Claudemiro Bolfarini , Sergio de Traglia Amancio-Filho

{"title":"Optimizing LPBF-parameters by Box-Behnken design for printing crack-free and dense high-boron alloyed stainless steel parts","authors":"Brenda Juliet Martins Freitas , Guilherme Yuuki Koga , Siegfried Arneitz , Claudemiro Bolfarini , Sergio de Traglia Amancio-Filho","doi":"10.1016/j.addlet.2024.100206","DOIUrl":"https://doi.org/10.1016/j.addlet.2024.100206","url":null,"abstract":"<div><p>Boron has almost null solubility in iron, and its addition to stainless steels leads to the formation of hard borides, beneficial for increasing the wear resistance. However, these boron-containing steels have poor printability, with the occurrence of pronounced cracking, high porosity and risk of delamination. In this work, Box-Behnken design coupled with analysis of variance (ANOVA) was used to optimize the LPBF (Laser Powder Bed Fusion) processing parameters of a highly boron-alloyed stainless steel reinforced with a boride network. The proposed models demonstrated to be accurate in determine the porosity percentage for the studied alloys, in which the laser power and scanning speed play the main role in the alloys’ densification, and absence of extensive defects. These results indicate that the use of design of experiments tools is essential to produce defect-free boron-modified stainless steel specimens with a relatively low number of experiments, identifying a narrow optimized processing window to build bulk composite materials.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"9 ","pages":"Article 100206"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277236902400015X/pdfft?md5=3f91a5baca22ab813f4f7fd2c8ce57ac&pid=1-s2.0-S277236902400015X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140350844","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

Influence of annealing on enhancing soft magnetic properties in laser powder bed fusion processed Hiperco (Fe-49Co-2V) 退火对提高激光粉末床熔融加工 Hiperco（Fe-49Co-2V）软磁特性的影响

Additive manufacturing letters Pub Date : 2024-04-01 DOI: 10.1016/j.addlet.2024.100208

S.M. Varahabhatla , V. Chaudhary , Abhishek Sharma , S.A. Mantri , S.S. Joshi , R.V. Ramanujan , Narendra B. Dahotre , R. Banerjee

{"title":"Influence of annealing on enhancing soft magnetic properties in laser powder bed fusion processed Hiperco (Fe-49Co-2V)","authors":"S.M. Varahabhatla , V. Chaudhary , Abhishek Sharma , S.A. Mantri , S.S. Joshi , R.V. Ramanujan , Narendra B. Dahotre , R. Banerjee","doi":"10.1016/j.addlet.2024.100208","DOIUrl":"https://doi.org/10.1016/j.addlet.2024.100208","url":null,"abstract":"<div><p>Annealing of laser powder bed fusion (LPBF) processed Fe-49Co-2 V (Hiperco) samples at 865 °C for 4 h leads to a substantial improvement in its soft magnetic properties. While the as built LPBF samples exhibited relatively higher coercivities (H<sub>c</sub>) ranging from 25.8 – 26.5 Oe, the annealed LPBF samples showed significantly lower coercivities (H<sub>c</sub>) of 6.9 – 10.8 Oe. These lower H<sub>c</sub> values can not only be attributed to the 15–20 times larger grain sizes, but also the higher degree of B2 ordering in the annealed condition. The enhanced degree of B2 ordering also increases the saturation magnetization (M<sub>s</sub>), from 213 to 228 emu/g, in samples processed with a laser fluence (energy/density) of 3.4 J/mm<sup>2</sup>. These results reveal the underlying mechanisms leading to an enhancement of soft magnetic properties in LPBF processed Hiperco via annealing-induced microstructural control.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"9 ","pages":"Article 100208"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369024000173/pdfft?md5=99e4562894d2f386a33ad10fe5997408&pid=1-s2.0-S2772369024000173-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140555047","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

Engineered substrates for metasurface antennas 用于超表面天线的工程基底

Additive manufacturing letters Pub Date : 2024-04-01 DOI: 10.1016/j.addlet.2024.100212

Kelvin J. Nicholson , Ellen Gupta , Colin Bonner , Theodore Fessaras , Mark Mirotznik

引用次数: 0

Acoustic signal monitoring using audible cracking sounds for efficient in-situ crack detection in laser directed energy deposition of hard surfaces 利用可闻裂纹声进行声学信号监测，以便在硬表面激光定向能沉积过程中进行高效的原位裂纹检测

Additive manufacturing letters Pub Date : 2024-04-01 DOI: 10.1016/j.addlet.2024.100210

Hong-Seok Kim, Sang-Hu Park

{"title":"Acoustic signal monitoring using audible cracking sounds for efficient in-situ crack detection in laser directed energy deposition of hard surfaces","authors":"Hong-Seok Kim, Sang-Hu Park","doi":"10.1016/j.addlet.2024.100210","DOIUrl":"https://doi.org/10.1016/j.addlet.2024.100210","url":null,"abstract":"<div><p>Laser directed energy deposition (LDED) is a promising way for creating hard surfaces like ceramic-reinforced metal matrix composites (MMC), but it faces a significant challenge in identifying crack formation during the process. As an emerging solution, acoustic signal monitoring is easy to be integrated within the process, and significantly reduces the time needed to detect micro-cracks in as-built MMC surfaces. This study reports on cracking sounds produced while employing LDED with SiC particles on a stainless steel 316 L substrate, examining the sound characteristics across time and frequency domains. Different sound sources in LDED are analyzed in the frequency domain, specifying the suitable frequency range for crack monitoring. Interestingly, the in-process micro-cracking on the hard surfaces produces a distinct audible ‘ping’ sound typically ranging between 12000 and 16000 Hz. By recording this sound, an efficient approach is proposed to identify crack generation during the rapid cooling in the LDED process of hard materials.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"9 ","pages":"Article 100210"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369024000197/pdfft?md5=09fe694b60697053a93114c1dff699e2&pid=1-s2.0-S2772369024000197-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140555048","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

Material dependent influence of ring/spot beam profiles in laser powder bed fusion 激光粉末床熔融中环形/点状光束轮廓对材料的影响

Additive manufacturing letters Pub Date : 2024-04-01 DOI: 10.1016/j.addlet.2024.100211

Lova Chechik , Karen Schwarzkopf , Richard Rothfelder , Jonas Grünewald , Michael Schmidt

{"title":"Material dependent influence of ring/spot beam profiles in laser powder bed fusion","authors":"Lova Chechik , Karen Schwarzkopf , Richard Rothfelder , Jonas Grünewald , Michael Schmidt","doi":"10.1016/j.addlet.2024.100211","DOIUrl":"https://doi.org/10.1016/j.addlet.2024.100211","url":null,"abstract":"<div><p>In recent years, the topic of beam shaping for improved laser material processing has rapidly grown influencing metal laser powder bed fusion (PBF-LB/M). Given the need to reduce the cost and improve control of the PBF-LB/M process to make it more competitive with traditional manufacturing methods, increasing productivity of PBF-LB/M is critical. When research reports a new beam profile (e.g. ring profile) to improve productivity on a specific material, it is often generalised, and assumed to have the capability to improve productivity in PBF-LB/M across the board. In this work, we use both low-fidelity simulations and experimental work to investigate the difference between Gaussian and ring/spot beam profiles on metals with very different thermal properties (a stainless steel and an aluminium alloy). We show that the two materials have opposite responses to the change in beam profile (both in terms of melt pool dimensions and thermal gradients); further, the most beneficial intensity distribution is dependent on the energy input to the material. This exemplifies yet another way in which the PBF-LB/M process is non-linear and contradicts the idea that a ring/spot laser profile is beneficial for all laser processing technologies. This highlights the need for further research into the non-linear effect of varying intensity distributions on laser processing before the benefits of dynamic beam shaping can be truly realised.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"9 ","pages":"Article 100211"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369024000203/pdfft?md5=0697aaba17712bb2b6a2c3122649fa45&pid=1-s2.0-S2772369024000203-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140619007","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

On the potential of eddy current characterization of the ferritic content of recovered 316L powders after LaserPowder bed fusion fabrication 激光粉末床熔融制造后回收的 316L 粉末中铁素体含量的涡流表征潜力

Additive manufacturing letters Pub Date : 2024-04-01 DOI: 10.1016/j.addlet.2024.100207

R. Saddoud , K. Perlin , N. Sergeeva-Chollet , T. Delacroix , A. Skarlatos , J.P. Garandet

引用次数: 0

Additive manufacturing of high nitrogen austenitic steel using shell-core strategy 利用壳芯策略快速成型制造高氮奥氏体钢

Additive manufacturing letters Pub Date : 2024-03-20 DOI: 10.1016/j.addlet.2024.100205

L. Becker , F. Radtke , J. Lentz , S. Herzog , C. Broeckmann , S. Weber

{"title":"Additive manufacturing of high nitrogen austenitic steel using shell-core strategy","authors":"L. Becker , F. Radtke , J. Lentz , S. Herzog , C. Broeckmann , S. Weber","doi":"10.1016/j.addlet.2024.100205","DOIUrl":"10.1016/j.addlet.2024.100205","url":null,"abstract":"<div><p>Laser Powder Bed Fusion/Metal (PBF-LB/M) is a promising technology for industrial applications, but challenges such as long process times remain. Innovations such as the shell-core approach aim to address this by creating a dense shell around a minimally exposed powder core, significantly reducing processing times, with full densification and property adjustments achieved by subsequent hot isostatic pressing (HIP). This study focuses on the fabrication of shell-core samples using a powder mixture of austenitic steel and Si<sub>3</sub>N<sub>4</sub> to produce high nitrogen steel PBF-LB/M components, which are otherwise difficult to produce due to the limited nitrogen solubility in the melt. PBF-LB/M induces Si<sub>3</sub>N<sub>4</sub> decomposition, resulting in Si and N loss through laser-powder interaction. Si<sub>3</sub>N<sub>4</sub> particles in the still powdered regions serve as a source of N enrichment during HIP, circumventing the limitations of nitrogen solubility in the melt and exploiting the higher solubility in the solid. After HIP, energy dispersive spectrometry and electron backscatter diffraction reveal a fully austenitic matrix with Si diffusion seams mainly in non-laser-exposed areas. The Si<sub>3</sub>N<sub>4</sub> dissolution during HIP contributes to an interstitial dissolved N content of about 0.189 mass%, which, together with the higher Si content, increases hardness. Wavelength dispersive spectrometry (WDS) and nanoindentation line scans show decreasing Si and N concentrations from core to shell, resulting in reduced (nano)hardness in the shell. This innovative approach demonstrates the potential to produce AM components with enhanced properties by overcoming the limitations of nitrogen solubility in the steel melt during PBF-LB/M.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"9 ","pages":"Article 100205"},"PeriodicalIF":0.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369024000148/pdfft?md5=0b96795d1bc1ad1cac1fac3ff935da14&pid=1-s2.0-S2772369024000148-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140271081","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

Additive friction stir deposition of super duplex stainless steel: Microstructure and mechanical properties 超级双相不锈钢的添加剂搅拌摩擦沉积：微观结构和机械性能

Additive manufacturing letters Pub Date : 2024-03-04 DOI: 10.1016/j.addlet.2024.100204

Meet Gor , Matthew Barnett , Daniel Fabijanic , Pinaki Prasad Bhattacharjee

{"title":"Additive friction stir deposition of super duplex stainless steel: Microstructure and mechanical properties","authors":"Meet Gor , Matthew Barnett , Daniel Fabijanic , Pinaki Prasad Bhattacharjee","doi":"10.1016/j.addlet.2024.100204","DOIUrl":"https://doi.org/10.1016/j.addlet.2024.100204","url":null,"abstract":"<div><p>Additive Friction Stir Deposition (AFSD) is an emerging solid-state metal additive manufacturing (AM) process that offers several key benefits, including high deposition rates and wrought-equivalent mechanical properties even in the as-deposited condition. The work presented is the first study to report on the development of microstructure and mechanical properties of AFSD-processed duplex stainless steel (DSS2507). The banded microstructure of the starting material was remarkably affected by AFSD processing; the austenite grains exhibited a refined and equiaxed morphology, while the ferrite grains appeared slightly larger and elongated. Microstructural observations revealed that the potential mechanism of microstructure evolution in austenite was discontinuous dynamic recrystallization (DDRX), while in ferrite, it was continuous dynamic recrystallization (CDRX). The occurrence of multiple thermal cycles during the AFSD process resulted in σ phase precipitation, which in turn led to considerable variation in mechanical properties with respect to the build direction. The top region of the as-built part with an insignificant σ phase fraction showed improved tensile strength and ductility combination compared to the as-received DSS2507 as well as other AM-processed DSS2507 alloys.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"9 ","pages":"Article 100204"},"PeriodicalIF":0.0,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772369024000136/pdfft?md5=2e417667694557ec2266019e852b53b2&pid=1-s2.0-S2772369024000136-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140061897","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