Progress in Additive Manufacturing最新文献_第4页

Metal casting into NaCl molds fabricated by material extrusion 3D printing 金属浇铸入材料挤压3D打印制造的NaCl模具中

Progress in Additive Manufacturing Pub Date : 2023-10-29 DOI: 10.1007/s40964-023-00528-2

René Wick-Joliat, Dirk Penner

{"title":"Metal casting into NaCl molds fabricated by material extrusion 3D printing","authors":"René Wick-Joliat, Dirk Penner","doi":"10.1007/s40964-023-00528-2","DOIUrl":"https://doi.org/10.1007/s40964-023-00528-2","url":null,"abstract":"Abstract Aluminum die casting is a well-established industrial process for mass producing aluminum parts with complex shapes, but design restrictions exclude some features like undercuts and hollow structures from being produced with this method. Water-soluble casting molds offer a promising solution to overcome those restrains, for example by hot pressing of salt cores or 3D printing of NaCl molds. Presently, 3D printing techniques available for NaCl are limited to direct ink writing (DIW) and photopolymerization. This study presents an approach to prepare NaCl parts by thermoplastic material extrusion (MEX) 3D printing. Firstly, a 3D printable feedstock is developed consisting of an organic binder, which is usually used for ceramic injection molding, and sodium chloride (NaCl) salt crystals. Various molds are then printed on a granulate-fed MEX printer. After thermal debinding and sintering at 690 °C, the 3D printed parts consist of pure NaCl. Furthermore, the same NaCl feedstock is used for injection molding. The bending strength of 3D printed samples with and without post-treatment are measured and compared to injection molded test specimens. Finally, metal casting in 3D printed NaCl molds is shown with tin or aluminum and the metal demonstrator parts with complex geometries such as gyroid structures and turbine wheels are released by dissolving the NaCl molds in water.","PeriodicalId":36643,"journal":{"name":"Progress in Additive Manufacturing","volume":"17 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136134592","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

A computational model for stereolithography apparatus (SLA) 3D printing 立体光刻设备(SLA) 3D打印的计算模型

Progress in Additive Manufacturing Pub Date : 2023-10-28 DOI: 10.1007/s40964-023-00525-5

Nandagopal Vidhu, Ayush Gupta, Roozbeh Salajeghe, Jon Spangenberg, Deepak Marla

引用次数: 0

Adapting Fe–Mn–Si–Cr shape memory alloy for laser powder bed fusion by adjusting the Mn content 通过调整锰含量调整用于激光粉末床熔化的铁-锰-硅-脆形状记忆合金

Progress in Additive Manufacturing Pub Date : 2023-10-28 DOI: 10.1007/s40964-023-00526-4

Eric Gärtner, Inga Meyenborg, A. Toenjes

引用次数: 0

Electron beam melting additive manufacturing process efficiency study of stainless steel 不锈钢电子束熔化增材制造工艺效率研究

Progress in Additive Manufacturing Pub Date : 2023-10-27 DOI: 10.1007/s40964-023-00522-8

Elroei Damri, Itzhak Orion, Yaron I. Ganor, Dor Braun, Eitan Tiferet

引用次数: 0

Solidification of the Ni-based superalloy CMSX-4 simulated with full complexity in 3-dimensions 三维模拟了ni基高温合金CMSX-4的凝固过程

Progress in Additive Manufacturing Pub Date : 2023-10-24 DOI: 10.1007/s40964-023-00513-9

Murali Uddagiri, Oleg Shchyglo, Ingo Steinbach, Marvin Tegeler

引用次数: 0

A simple potential energy formulation for 3D concrete printed structures considering the shear effects in the build direction 考虑建筑方向剪切效应的三维混凝土打印结构的简单势能公式

Progress in Additive Manufacturing Pub Date : 2023-10-20 DOI: 10.1007/s40964-023-00509-5

Lalit Kumar, Biranchi Panda, N. Muthu

引用次数: 0

Experimental and numerical investigations of the hot cracking susceptibility during the powder bed fusion of AA 7075 using a laser beam 激光对AA 7075粉末床熔合热裂敏感性的实验与数值研究

Progress in Additive Manufacturing Pub Date : 2023-10-17 DOI: 10.1007/s40964-023-00523-7

Andreas Wimmer, Hannes Panzer, Christopher Zoeller, Stefan Adami, Nikolaus A. Adams, Michael F. Zaeh

{"title":"Experimental and numerical investigations of the hot cracking susceptibility during the powder bed fusion of AA 7075 using a laser beam","authors":"Andreas Wimmer, Hannes Panzer, Christopher Zoeller, Stefan Adami, Nikolaus A. Adams, Michael F. Zaeh","doi":"10.1007/s40964-023-00523-7","DOIUrl":"https://doi.org/10.1007/s40964-023-00523-7","url":null,"abstract":"Abstract The variety of processable materials for the powder bed fusion of metals using a laser beam (PBF-LB/M) is still limited. In particular, high-strength aluminum alloys are difficult to process with PBF-LB/M without the occurrence of hot cracks. In situ alloying is a promising method to modify the physical properties of an alloy to reduce its hot cracking susceptibility. In this work, the aluminum alloy 7075 and blends with 2 wt.%, 4 wt.%, and 6 wt.% of Si were processed via PBF-LB/M. The Rappaz–Drezet–Gremaud (RDG) model and the Kou model were investigated regarding their capability of predicting the hot cracking behavior for the aluminum alloy 7075 and the three powder blends. The smoothed-particle hydrodynamics (SPH) method was used to gain the thermal input data for the RDG model. A clear tendency of a reduced hot cracking susceptibility with an increasing amount of Si was observed in the experiments and in the simulations. A detailed analysis of the type of the hot cracking mechanism in the aluminum alloy 7075 provided several indications of the presence of liquation cracking. The Kou model and the RDG model may be applicable for both solidification and liquation cracking. The presented methodology can be used to investigate any material combination and its susceptibility to hot cracking.","PeriodicalId":36643,"journal":{"name":"Progress in Additive Manufacturing","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136033468","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

Preliminary colour characterisation of a Stratasys J750 digital anatomy printer with different fillings and face orientations Stratasys J750数字解剖打印机不同填充物和面朝向的初步色彩特征

Progress in Additive Manufacturing Pub Date : 2023-10-17 DOI: 10.1007/s40964-023-00519-3

Faizan Badar, Luigi-Jules Vandi, Danilo Carluccio, Michael Redmond, James I. Novak

{"title":"Preliminary colour characterisation of a Stratasys J750 digital anatomy printer with different fillings and face orientations","authors":"Faizan Badar, Luigi-Jules Vandi, Danilo Carluccio, Michael Redmond, James I. Novak","doi":"10.1007/s40964-023-00519-3","DOIUrl":"https://doi.org/10.1007/s40964-023-00519-3","url":null,"abstract":"Abstract Multicolour capability in additive manufacturing could play a key role in certain applications such as surgical training and consumer products. However, the ability to accurately 3D print colours is not well documented and could affect the realism of models produced through these technologies. As a recent system, the Stratasys J750 Digital Anatomy Printer has yet to be analyzed for its colour perception and accuracy, which is quantified through this study. This will allow users of this and similar material jetting systems with an improved understanding of the relationship between digitally applied colours and their result when 3D printed, as well as the influence of certain settings. Thirty-three rectangular prism models with different CMYK and RGB colours, as well as infill materials, were printed on a Stratasys J750 DAP printer. These were scanned on five faces using a Nix Mini 2 handheld colour sensor, documenting readings in CIELAB format. The data were analyzed using the CIEDE2000 colour difference formula, and its recent modifications for 3D printed objects. Results found statistically significant and perceptive differences in colour accuracy among different colours, core materials, and face orientations. It was also observed that the addition of VeroPureWhite as filler material instead of the default SUP706 support improved colour accuracy. The study recommends the following steps to improve colour accuracy: (i) avoid the addition of black (K) manually in CMYK colour space, (ii) use pure white as the base infill material instead of support material, (iii) add a little white (~ 10%–30%) to make samples opaque instead of translucent.","PeriodicalId":36643,"journal":{"name":"Progress in Additive Manufacturing","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135994081","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

3D morphological analysis of Fe-based metallic glass surfaces via laser powder bed fusion using a digital microscope 利用数码显微镜对铁基金属玻璃表面激光粉末床熔接的三维形态分析

Progress in Additive Manufacturing Pub Date : 2023-10-16 DOI: 10.1007/s40964-023-00511-x

Wenzheng Wu, Aodu Zheng, Qingping Liu, Jerry Ying Hsi Fuh, Luquan Ren, Guiwei Li

引用次数: 0

Miniaturized fused granulate fabrication of polyether ether ketone (PEEK) 聚醚醚酮(PEEK)微型化熔融制粒

Progress in Additive Manufacturing Pub Date : 2023-10-14 DOI: 10.1007/s40964-023-00518-4

Albert Curmi, Arif Rochman

引用次数: 0