Additive manufacturing letters最新文献_第10页

Exploring Alloy Design Pathway Through Directed Energy Deposition of Powder Mixtures: A Study of Stainless Steel 316L and Inconel 718 利用定向能沉积粉末混合物探索合金设计途径——以不锈钢316L和因科乃尔718为研究对象

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100133

Noah Sargent , Yuankang Wang , Daozheng Li, Yunhao Zhao, Xin Wang, Wei Xiong

{"title":"Exploring Alloy Design Pathway Through Directed Energy Deposition of Powder Mixtures: A Study of Stainless Steel 316L and Inconel 718","authors":"Noah Sargent , Yuankang Wang , Daozheng Li, Yunhao Zhao, Xin Wang, Wei Xiong","doi":"10.1016/j.addlet.2023.100133","DOIUrl":"10.1016/j.addlet.2023.100133","url":null,"abstract":"<div><p>Additive manufacturing (AM) is a tool for rapid prototyping with complex geometry. However, the cyclic heating and cooling in laser melting processes often cause large columnar grains that dominate the as-printed microstructure, resulting in a strong texture and anisotropic properties that limit the application of AM. In this work, we apply powder-based directed energy deposition to discover new alloys using mixtures of Inconel 718 (IN718) and Stainless Steel 316L (SS316L). We discovered that the 77 wt.% IN718 alloy mixture, with the highest configurational entropy, demonstrated an intriguingly fine grain structure in the as-built condition and after homogenization at 1180°C. Residual stress from the laser melting process was identified as the primary cause of the observed grain refinement phenomenon. Although, a quantitative analysis of the changes in grain size after homogenization in the alloy mixtures of IN718 and SS316L requires further research. The discovery of this unique microstructural behavior shows how in-situ mixing of commercially available powders can be used to develop next-generation feedstock materials for AM and improve the understanding of fundamental process-microstructure-property relationships.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46159634","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: 5

Simultaneous 3D tracking and temperature measurements of L-PBF spatter particles using a single camera L-PBF飞溅颗粒的三维同步跟踪和温度测量

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100134

Dustin Kelly , Ralf D. Fischer , Mahyar Moaven , Sarah Morris , Barton C. Prorok , Brian Thurow

{"title":"Simultaneous 3D tracking and temperature measurements of L-PBF spatter particles using a single camera","authors":"Dustin Kelly , Ralf D. Fischer , Mahyar Moaven , Sarah Morris , Barton C. Prorok , Brian Thurow","doi":"10.1016/j.addlet.2023.100134","DOIUrl":"10.1016/j.addlet.2023.100134","url":null,"abstract":"<div><p>This work discusses the implementation of a novel technique for simultaneous 3D particle tracking velocimetry and dual-wavelength pyrometry of spatter particles ejected during the Laser-Powder Bed Fusion (L-PBF) process using a single high-speed spectral plenoptic camera. In this methodology, particle tracking uses the Light-Field Ray Bundling algorithm paired with a four-frame best estimate track initiation with 3D Kalman filter for tracking to generate high-resolution, time-resolved 3D tracks of spatter particles. Utilizing the same light-field image data, spatter particle temperature is measured using dual-wavelength pyrometry that calculates temperature from the ratio of two narrow-band wavelength intensities. Preliminary results demonstrate the viability and potential of this technique for the L-PBF processes on the example of a turnaround laser scan. The temperature measurements indicate that the detected particles are in the liquid phase, with temperatures greater than 1950 <span><math><mtext>°</mtext></math></span>C. The simultaneous measurements demonstrate an overall deceleration and cooling of particles during their flight.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46369766","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

Effect of solidification pathway during additive manufacturing on grain boundary fractality 增材制造过程中凝固路径对晶界分形的影响

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100149

Akane Wakai , Amlan Das , Jenniffer Bustillos , Atieh Moridi

引用次数: 2

Inconel 718 two ways: Powder bed fusion vs. directed energy deposition Inconel 718两种方法:粉末床熔合与定向能沉积

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100145

Lova Chechik, Iain Todd

引用次数: 0

3D characterization of magnetic phases through neutron polarization contrast tomography 中子极化对比层析成像对磁相的三维表征

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100155

Matteo Busi , Efthymios Polatidis , Stavros Samothrakitis , Patrick Köhnen , Florencia Malamud , Christian Haase , Markus Strobl

{"title":"3D characterization of magnetic phases through neutron polarization contrast tomography","authors":"Matteo Busi , Efthymios Polatidis , Stavros Samothrakitis , Patrick Köhnen , Florencia Malamud , Christian Haase , Markus Strobl","doi":"10.1016/j.addlet.2023.100155","DOIUrl":"10.1016/j.addlet.2023.100155","url":null,"abstract":"<div><p>The advancement of laser-based metal additive manufacturing has enabled the production of near net shape complex geometries. Understanding the microstructural features of materials is crucial for accurate modeling of their mechanical behavior, particularly with regard to strain- or thermal-induced martensitic phase transformations in ferrous alloys and steels. For example, the formation of BCC α′-martensite can strengthen materials while preserving ductility of the dominating austenitic phase. However, in components where the shape memory effect is attributed to the reversible formation of ε-martensite, the accumulation of deformation-induced α′-martensite is an undesired, irreversible degradation mechanism. This study presents a novel tomographic approach utilizing polarization contrast neutron imaging for the 3D volumetric characterization of magnetic crystallographic phases, especially those present in low phase fractions that are typically undetectable with traditional techniques. The technique is applied to the study of strain-induced martensitic phase transformations in additively manufactured lattice structures made of high-Mn steels, which form small fractions of α′-martensite upon deformation. The results demonstrate the value of this technique for characterizing entire components and complex geometries found in numerous technological applications.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48564887","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

Towards carbide-rich tool steels in PBF-LB/M: TiC additivation of AISI H13 PBF-LB/M中富碳化物工具钢的研究:AISI H13的TiC添加

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100143

Marie Luise Köhler , Michael Norda , Simone Herzog , Anke Kaletsch , Frank Petzoldt , Christoph Broeckmann

{"title":"Towards carbide-rich tool steels in PBF-LB/M: TiC additivation of AISI H13","authors":"Marie Luise Köhler , Michael Norda , Simone Herzog , Anke Kaletsch , Frank Petzoldt , Christoph Broeckmann","doi":"10.1016/j.addlet.2023.100143","DOIUrl":"10.1016/j.addlet.2023.100143","url":null,"abstract":"<div><p>The range of available alloys for laser-based powder bed fusion of metals (PBF-LB/M) is still quite low and limits the application of this process. In-situ alloying via PBF-LB/M by using powder blends from conventionally available powders enables a more flexible approach of alloy design. Additivated carbides bear large potential as their content in pre-alloyed powder is limited by the alloy's cracking tendency. In general, PBF-LB/M requires spherical particles in the range of around 20-50 µm. However, carbides often differ from that requirement, arising the question to which extent other particle morphologies can be blended. In this study, AISI H13 base steel was blended with 5 wt.-% edged TiC and processed on two different machines to analyze the effects of irregular shaped carbide additions to a tool steel on the PBF-LB/M processability. Small differences in the specimen's chemical composition were identified and related to their position on the substrate plate. In-depth microstructure analysis by EBSD and texture analysis were performed as well as hardness tests to reveal the alloy's potential in the future. Crack-free processing with a pre-heated substrate plate, a shift towards isotropic microstructures and a hardness increase were obtained with the carbide additivation process.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41954887","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

Wear and material characterization of CuSn10 additively manufactured using directed energy deposition 使用定向能沉积添加制造的CuSn10的磨损和材料特性

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100136

Sunil Raghavendra , Priyadarshini Jayashree , Domenico Antonio Rita , Giuseppe Piras , David Scheider , Marco Chemello , Matteo Benedetti

{"title":"Wear and material characterization of CuSn10 additively manufactured using directed energy deposition","authors":"Sunil Raghavendra , Priyadarshini Jayashree , Domenico Antonio Rita , Giuseppe Piras , David Scheider , Marco Chemello , Matteo Benedetti","doi":"10.1016/j.addlet.2023.100136","DOIUrl":"10.1016/j.addlet.2023.100136","url":null,"abstract":"<div><p>In the current scenario, a decline in the natural deposits of copper and its alloys has called for the efficient usage of bronze in mechanical components. The development of additive manufacturing processes such as Directed Energy Deposition (DED) provides an opportunity to address this issue by replacing complete bronze components such as worm wheels with parts made of less critical raw materials and provided with bronze coatings on the wear-active interfaces. Therefore, this current work focuses on evaluating the deposition of CuSn10 on a steel substrate using DED. Four types of specimens are manufactured, three having deposition of CuSn10 on the steel substrate and one specimen having an initial deposition of CuSn10 + 316L mixture followed by CuSn10. The laser power for the deposition process was varied through the thickness of the deposition with values varying between a minimum of 600 W to a maximum of 1100 W. The specimens were subjected to wear testing under dry conditions to evaluate their friction behavior and to check for debonding between the substrate and deposition. The effect of different laser power on porosity, microstructure, and microhardness was evaluated. The results, when compared with wrought CuSn10, indicated that the DED CuSn10 can be a probable replacement for wrought CuSn10 in worm wheels.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48649616","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

Influence of a vibrating build platform on the density and hardness of parts made by laser powder bed fusion of metals 振动成型平台对金属激光粉末床熔接零件密度和硬度的影响

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100152

Nick Hantke, Tobias Grimm, Jan T. Sehrt

引用次数: 0

Effective absorptivity of diamond-reinforced metal matrix composites for powder bed fusion using a laser beam 激光粉末床熔接金刚石增强金属基复合材料的有效吸收率

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100138

Norman Schnell , Jan Wegner , Arno Elspaß , Stefan Kleszczynski

{"title":"Effective absorptivity of diamond-reinforced metal matrix composites for powder bed fusion using a laser beam","authors":"Norman Schnell , Jan Wegner , Arno Elspaß , Stefan Kleszczynski","doi":"10.1016/j.addlet.2023.100138","DOIUrl":"https://doi.org/10.1016/j.addlet.2023.100138","url":null,"abstract":"<div><p>Fabricating diamond-reinforced metal matrix composites through powder bed fusion is an innovative approach for creating abrasive tools with elaborate geometric features. Setting up a stable and reproducible process demands an in-depth understanding of the transient thermal system. The addition of reinforcement particles significantly alters the processing behavior. Furthermore, diamonds are susceptible to thermal degradation, which necessitates careful process development to avoid overheating. Laser absorption has an especially strong impact on the decisive local peak temperatures. Therefore, a calorimetric in-situ method for measuring a material-specific effective absorptivity is adapted. The setup is modified to measure multiple layers, which makes it possible to account for the effective powder layer heights that develop during the process. The results show the effect of different diamond fractions on the absorbed energy. The findings are validated through light microscopy as well as in-situ high-speed camera imaging of single tracks, and their meaning for future research on diamond reinforced metal matrix composites is discussed.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49752247","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

Laser shape variation influence on melt pool dynamics and solidification microstructure in laser powder bed fusion 激光粉末床熔接中激光形状变化对熔池动力学和凝固组织的影响

Additive manufacturing letters Pub Date : 2023-07-01 DOI: 10.1016/j.addlet.2023.100141

Erlei Li , Haopeng Shen , Lin Wang , Geoff Wang , Zongyan Zhou

{"title":"Laser shape variation influence on melt pool dynamics and solidification microstructure in laser powder bed fusion","authors":"Erlei Li , Haopeng Shen , Lin Wang , Geoff Wang , Zongyan Zhou","doi":"10.1016/j.addlet.2023.100141","DOIUrl":"10.1016/j.addlet.2023.100141","url":null,"abstract":"<div><p>The shape variation of the laser beam is evidently observed in the laser powder bed fusion (LPBF) process because of changes in laser incidence angle and misalignment between the build plate and the laser focus plane. This issue is particularly relevant in large-scale LPBF systems where the laser beam needs to scan a large build area. However, most LPBF modeling studies assume vertical laser radiation. The heat transfer, melt pool, and solidification evolution due to the laser shape variation have not been well addressed and quantified. In the present study, the temperature distribution, melt pool geometry and flow dynamics are captured via numerical modelling, and the grain morphology is characterized under various laser incidence angles. The results show that the melt pool depth becomes shallower, and the width is near the beam size as the laser beam becomes more elongated. The beam shape variation can affect the liquid flow pattern with increasing incidence angle, resulting in a larger vortex at the front of the melt pool and a smaller vortex at the rear of the melt pool. The thermal gradient increases and the solidification rate decreases as the laser incident angle becomes larger. The present study enhances the understanding of multi-physics in the LPBF process.</p></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48454791","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