Journal articles: 'Direct laser sintering'

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Grünberger, Thomas, and Robert Domröse. "Direct Metal Laser Sintering." Laser Technik Journal 12, no. 1 (January 2015): 45–48. http://dx.doi.org/10.1002/latj.201500007.

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Băilă, Diana-Irinel. "Dental Restorations of Co-Cr Using Direct Metal Laser Sintering Process." International Journal of Materials, Mechanics and Manufacturing 6, no. 2 (April 2018): 94–98. http://dx.doi.org/10.18178/ijmmm.2018.6.2.354.

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Agarwala, Mukesh, David Bourell, Joseph Beaman, Harris Marcus, and Joel Barlow. "Direct selective laser sintering of metals." Rapid Prototyping Journal 1, no. 1 (March 1995): 26–36. http://dx.doi.org/10.1108/13552549510078113.

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Ebersold, Zoran, Nebojsa Mitrovic, Slobodan Djukic, Branka Jordovic, and Aleksandar Peulic. "Defectoscopy of direct laser sintered metals by low transmission ultrasonic frequencies." Science of Sintering 44, no. 2 (2012): 177–85. http://dx.doi.org/10.2298/sos1202177e.

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This paper focuses on the improvement of ultrasonic defectoscopy used for machine elements produced by direct laser metal sintering. The direct laser metal sintering process introduces the mixed metal powder and performs its subsequent laser consolidation in a single production step. Mechanical elements manufactured by laser sintering often contain many hollow cells due to weight reduction. The popular pulse echo defectoscopy method employing very high frequencies of several GHz is not successful on these samples. The aim of this paper is to present quadraphonic transmission ultrasound defectoscopy which uses low range frequencies of few tens of kHz. Therefore, the advantage of this method is that it enables defectoscopy for honeycombed materials manufactured by direct laser sintering. This paper presents the results of testing performed on AlSi12 sample.

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Tang, Y., J. Y. H. Fuh, H. T. Loh, Y. S. Wong, and L. Lu. "Direct laser sintering of a silica sand." Materials & Design 24, no. 8 (December 2003): 623–29. http://dx.doi.org/10.1016/s0261-3069(03)00126-2.

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Kang, Hyun Goo, Toshiko Osada, and Hideshi Miura. "Density Gradient Materials by Direct Metal Laser Sintering." Advanced Materials Research 89-91 (January 2010): 281–84. http://dx.doi.org/10.4028/www.scientific.net/amr.89-91.281.

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The direct metal laser sintering process was applied to produce density gradient materials of stainless steel 316L. In order to understand the mechanism of forming porous structure, the influence of laser power, scan rate and scan pitch on the porosity were investigated by measuring density of produced samples and observing cross-sectional microstructures. Laser power greatly affected to the porosity by forming clusters of melted metal powders. It was found that the size change of clusters plays a role in forming porous structure. Eventually, three dimensional sample owing density gradient structures was manufactured.

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Mierzejewska, Ż. A. "Process Optimization Variables for Direct Metal Laser Sintering." Advances in Materials Science 15, no. 4 (December 1, 2015): 38–51. http://dx.doi.org/10.1515/adms-2015-0021.

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AbstractManufacturing is crucial to creation of wealth and provision of quality of life. Manufacturing covers numerous aspects from systems design and organization, technology and logistics, operational planning and control. The study of manufacturing technology is usually classified into conventional and non-conventional processes. As it is well known, the term "rapid prototyping" refers to a number of different but related technologies that can be used for building very complex physical models and prototype parts directly from 3D CAD model. Among these technologies are selective laser sintering (SLS) and direct metal laser sintering (DMLS). RP technologies can use wide range of materials which gives possibility for their application in different fields. RP has primary been developed for manufacturing industry in order to speed up the development of new products (prototypes, concept models, form, fit, and function testing, tooling patterns, final products - direct parts). Sintering is a term in the field of powder metallurgy and describes a process which takes place under a certain pressure and temperature over a period of time. During sintering particles of a powder material are bound together in a mold to a solid part. In selective laser sintering the crucial elements pressure and time are obsolete and the powder particles are only heated for a short period of time. SLS uses the fact that every physical system tends to achieve a condition of minimum energy. In the case of powder the partially melted particles aim to minimize their in comparison to a solid block of material enormous surface area through fusing their outer skins. Like all generative manufacturing processes laser sintering gains the geometrical information out of a 3D CAD model. This model is subdivided into slices or layers of a certain layer thickness. Following this is a revolving process which consists of three basic process steps: recoating, exposure, and lowering of the build platform until the part is finished completely.

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Zhu, H. H., J. Y. H. Fuh, and L. Lu. "Formation of Fe—Cu metal parts using direct laser sintering." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 217, no. 1 (January 1, 2003): 139–47. http://dx.doi.org/10.1243/095440603762554686.

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The direct laser sintering process is currently being used to manufacture metallic parts for prototyping and tooling directly. This paper reports on the direct laser sintering of Fe—Cu metal powder using a 200 W CO2 laser. The effects of the ratio of Fe to Cu, the scan speed and atmosphere on the distortion, surface morphology and surface roughness have been investigated. The experiment also investigated the role of adding W particles to the Fe—Cu mixture. The result shows that adding W particles can reduce part distortion. To find the effect of gas protection in laser sintering, the three-dimensional specimens fabricated in both air and N2 atmosphere are also compared.

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Cardaropoli, Francesco, Fabrizia Caiazzo, and Vincenzo Sergi. "Evolution of Direct Selective Laser Sintering of Metals." Advanced Materials Research 383-390 (November 2011): 6252–57. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6252.

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Direct Metal Selective Laser Sintering (DMSLS) is a layer-by-layer additive process for metal powders, which allows quick production of complex geometry parts. The aim of this study is to analyse the improvement of DMSLS with “EOSINT M270”, the new laser sintering machine developed by EOS. Tests were made on sintered parts of Direct Metal 20 (DM20), a bronze based powder with a mean grain dimension of 20 μm. Different properties and accuracy were evaluated for samples manufactured with three different exposure strategies. Besides mechanical properties, the manufacturing process was also examined in order to evaluate its characteristics. The quality of laser sintered parts is too affected by operator experience and skill. Furthermore, critical phases are not automatic and this causes an extension of time required for the production. Due to these limitations, DMSLS can be used for Rapid Manufacturing, but it is especially suitable to few sample series.

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Simchi, A., and H. Pohl. "Direct laser sintering of iron–graphite powder mixture." Materials Science and Engineering: A 383, no. 2 (October 2004): 191–200. http://dx.doi.org/10.1016/j.msea.2004.05.070.

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Fayed, E. M., A. S. Elmesalamy, M. Sobih, and Y. Elshaer. "Characterization of direct selective laser sintering of alumina." International Journal of Advanced Manufacturing Technology 94, no. 5-8 (September 8, 2017): 2333–41. http://dx.doi.org/10.1007/s00170-017-0981-y.

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Bakheet Jasim, Hasan, and Basim Abdulkareem Farhan. "Practical analysis of direct metal laser sintering process." Materials Today: Proceedings 45 (2021): 5469–75. http://dx.doi.org/10.1016/j.matpr.2021.02.138.

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Aziz, I. A., Brian Gabbitas, and Mark Stanford. "Direct Metal Laser Sintering of a Ti6Al4V Mandible Implant." Key Engineering Materials 520 (August 2012): 220–25. http://dx.doi.org/10.4028/www.scientific.net/kem.520.220.

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The aim of this study is to investigate the direct manufacturing of a titanium mandible implant via a laser sintering process which involves the different areas of medicine, engineering and product design. The manufacturing and challenges for producing customised titanium implants are described in this work. Implant data and its functional requirements of loading and fixation are established based on CT scan data. The process of converting different types of data from CT scans to 3D design and then to readable machine data and its associated processing software are illustrated and explained. The mandible tray was designed with a predefined porous structure to reduce weight and stimulate better bio-factor delivery at the same time. The laser sintering process and its critical steps for producing a tailored structure and complex shape are reported. This includes titanium powder preparation, processing parameters, support structures, model inclination, post-processing works and associated costs. Results show that it is possible to fabricate a customised mandible implant with a complex structure and having sufficient detail through the laser sintering process. This technique provides a platform to respond quickly and build accurate parts with good surface finish.

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Băilă, Diana Irinel. "Corrosion Behavior in Artificial Saliva of Personalized Dental Crowns of Co-Cr Alloys Manufactured by DMLS Process." Applied Mechanics and Materials 799-800 (October 2015): 515–19. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.515.

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The purpose of this paper is to realize some researches concerning the powder Co-Cr, the sintering compacts obtain after Direct Metal Laser Sintering manufacturing and the corrosion resistance in artificial saliva. The Co-Cr alloys are used frequently in dentistry to realize personalized dental crown, bridges, chapels, dental implants or microsurgery instruments. The Co-Cr powders are used in Direct Metal Laser Sintering technologies to obtain personalized dental crown with complex forms after a ”stl” file, realized after a tomography or oral scanning. Direct Metal Laser Sintering process is used to realize quickly a scale model of physical part or assembly using 3D computer aided design CAD data. This alloy must present good corrosion behavior and mechanical resistance to be used in medical domain.

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Витязев, Ю. Б., А. Г. Гребеников, А. М. Гуменный, А. М. Ивасенко, and А. А. Соболев. "МЕТОД СОЗДАНИЯ МОДЕЛЕЙ САМОЛЕТОВ С ПОМОЩЬЮ СИСТЕМ CAD/CAM/CAE И АДДИТИВНЫХ ТЕХНОЛОГИЙ." Open Information and Computer Integrated Technologies, no. 81 (November 16, 2018): 24–34. http://dx.doi.org/10.32620/oikit.2018.81.03.

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The analysis of the most applicable in mechanical engineering additive technologies (fused deposition modeling, selective laser sintering, laser stereolithography, direct metal laser sintering) have been performed. Method of creating airplane models using CAD/CAM/CAE systems and additive manufacturing is presented. The results of the application of selective laser sintering and fused deposition modeling for the manufacture of training aircraft models are considered.

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Castanho, J. M., M. Matos, and M. T. Vieira. "Reinforcement Coating on Stainless Steel and Copper Powders." Microscopy and Microanalysis 14, S3 (September 2008): 43–46. http://dx.doi.org/10.1017/s1431927608089344.

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The continuous miniaturization of the mechanical components and devices push to microfabrication techniques such as μPIM (micro-Powder Injection Moulding) and laser sintering, particularly DMLS (Direct Metal Laser Sintering).

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He, Chongwen, Haihong Zhu, and Panpan Hu. "Fabrication of water-cooled laser silicon mirror by direct laser sintering." Optics Express 22, no. 8 (April 17, 2014): 9902. http://dx.doi.org/10.1364/oe.22.009902.

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Sing, Swee Leong, Wai Yee Yeong, Florencia Edith Wiria, Bee Yen Tay, Ziqiang Zhao, Lin Zhao, Zhiling Tian, and Shoufeng Yang. "Direct selective laser sintering and melting of ceramics: a review." Rapid Prototyping Journal 23, no. 3 (April 18, 2017): 611–23. http://dx.doi.org/10.1108/rpj-11-2015-0178.

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Purpose This paper aims to provide a review on the process of additive manufacturing of ceramic materials, focusing on partial and full melting of ceramic powder by a high-energy laser beam without the use of binders. Design/methodology/approach Selective laser sintering or melting (SLS/SLM) techniques are first introduced, followed by analysis of results from silica (SiO2), zirconia (ZrO2) and ceramic-reinforced metal matrix composites processed by direct laser sintering and melting. Findings At the current state of technology, it is still a challenge to fabricate dense ceramic components directly using SLS/SLM. Critical challenges encountered during direct laser melting of ceramic will be discussed, including deposition of ceramic powder layer, interaction between laser and powder particles, dynamic melting and consolidation mechanism of the process and the presence of residual stresses in ceramics processed via SLS/SLM. Originality/value Despite the challenges, SLS/SLM still has the potential in fabrication of ceramics. Additional research is needed to understand and establish the optimal interaction between the laser beam and ceramic powder bed for full density part fabrication. Looking into the future, other melting-based techniques for ceramic and composites are presented, along with their potential applications.

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Murali, K., A. N. Chatterjee, P. Saha, R. Palai, S. Kumar, S. K. Roy, P. K. Mishra, and A. Roy Choudhury. "Direct selective laser sintering of iron–graphite powder mixture." Journal of Materials Processing Technology 136, no. 1-3 (May 2003): 179–85. http://dx.doi.org/10.1016/s0924-0136(03)00150-x.

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Zhang, Xiang, Fei Wang, Zhipeng Wu, Yongfeng Lu, Xueliang Yan, Michael Nastasi, Yan Chen, Yifei Hao, Xia Hong, and Bai Cui. "Direct selective laser sintering of hexagonal barium titanate ceramics." Journal of the American Ceramic Society 104, no. 3 (November 20, 2020): 1271–80. http://dx.doi.org/10.1111/jace.17568.

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Wang, Jin, Mo Yang, and Yuwen Zhang. "A Nonequilibrium Thermal Model for Direct Metal Laser Sintering." Numerical Heat Transfer, Part A: Applications 67, no. 3 (October 23, 2014): 249–67. http://dx.doi.org/10.1080/10407782.2014.923231.

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Cabrini, M., S. Lorenzi, T. Pastore, S. Pellegrini, M. Pavese, P. Fino, E. P. Ambrosio, F. Calignano, and D. Manfredi. "Corrosion resistance of direct metal laser sintering AlSiMg alloy." Surface and Interface Analysis 48, no. 8 (March 10, 2016): 818–26. http://dx.doi.org/10.1002/sia.5981.

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KAKISAKO, Ken, Hideki KYOGOKU, Akihiko IKUTA, Takeshi UEMORI, and Kenichi YOSHIKAWA. "S041015 Direct Selective Laser Sintering of Tool Steel Powder." Proceedings of Mechanical Engineering Congress, Japan 2012 (2012): _S041015–1—_S041015–4. http://dx.doi.org/10.1299/jsmemecj.2012._s041015-1.

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Dmitriyev, T., and S. Manakov. "Digital Modeling Accuracy of Direct Metal Laser Sintering Process." Eurasian Chemico-Technological Journal 22, no. 2 (June 30, 2020): 123. http://dx.doi.org/10.18321/ectj959.

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Products obtained by metal additive manufacturing have exceptional strength properties that can be compared with forged parts, and in some cases, even surpass them. Also, the cost and time of parts manufacture are reduced by two or even three times. Because of this, today’s leading corporations in the field of aerospace industry introducing this technology to its production. To avoid loss of funds and time, the processes of additive manufacturing should be predictable. Simufact Additive is specialized software for additive manufacturing process simulation is dedicated to solving critical issues with metal 3D printing, including significantly reducing distortion; minimize residual stress to avoid failures; optimize the build-up orientation and the support structures. It also enables us to compare simulated parts with the printed sample or measure it as a reference. In other words, the simulated deformations can be estimated concerning the reference geometry. The current work aims to study the deformation of the sample during the Direct Metal Laser Sintering (DMLS) process made from Maraging Steel MS1. Simufact Additive software was used to simulate the printing process. The main idea is to compare the results of the simulation and the real model. EOS M290 metal 3D printer was used to make a test specimen.

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Venkatesh, K. Vijay, and V. Vidyashree Nandini. "Direct Metal Laser Sintering: A Digitised Metal Casting Technology." Journal of Indian Prosthodontic Society 13, no. 4 (February 5, 2013): 389–92. http://dx.doi.org/10.1007/s13191-013-0256-8.

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Verma, Anoop, Satish Tyagi, and Kai Yang. "Modeling and optimization of direct metal laser sintering process." International Journal of Advanced Manufacturing Technology 77, no. 5-8 (October 26, 2014): 847–60. http://dx.doi.org/10.1007/s00170-014-6443-x.

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Kotila, Juha, Tatu Syvänen, Jouni Hänninen, Maria Latikka, and Olli Nyrhilä. "Direct Metal Laser Sintering – New Possibilities in Biomedical Part Manufacturing." Materials Science Forum 534-536 (January 2007): 461–64. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.461.

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Direct Metal Laser Sintering (DMLS) has been utilized for prototype manufacturing of functional metal components for years now. During this period the surface quality, mechanical properties, detail resolution and easiness of the process have been improved to the level suitable for direct production of complex metallic components for various applications. The paper will present the latest DMLS technology utilizing EOSINT M270 laser sintering machine and EOSTYLE support generation software for direct and rapid production of complex shaped metallic components for various purposes. The focus of the presentation will be in rapid manufacturing of customized biomedical implants and surgical devices of the latest stainless steel, titanium and cobalt-chromium-molybdenum alloys. In addition to biomedical applications, other application areas where complex metallic parts with stringent requirements are being needed will be presented.

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Khabarov, Kirill, Denis Kornyushin, Bulat Masnaviev, Dmitry Tuzhilin, Dmitry Saprykin, Alexey Efimov, and Victor Ivanov. "The Influence of Laser Sintering Modes on the Conductivity and Microstructure of Silver Nanoparticle Arrays Formed by Dry Aerosol Printing." Applied Sciences 10, no. 1 (December 28, 2019): 246. http://dx.doi.org/10.3390/app10010246.

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The demand for the development of local laser sintering of nanoparticle arrays is explained by the expanding needs for printed electronics for functional microstructure formation, on heat-sensitive substrates in particular. This work is based on the research into the sintering of arrays of silver nanoparticles synthesized in a spark discharge and deposited on a substrate by focused aerosol flow. The sintering was done by continuous and pulsed lasers with wavelengths 527, 980 and 1054 nm. Sintered samples were studied by measuring the resistivity, cross-section profile area and microstructure features. The highest average conductivity, equal to the half of the bulk silver conductivity, was achieved when sintering by continuous radiation with a wavelength 980 nm. The results showed that when using pulsed radiation the direct heating of nanoparticles in the sample surface layer dominates with the formation of a pore-free conductive layer of around 0.5 μm thick and crystallite of 70–80 nm size. It was found that laser sintering by radiation with a wavelength 527 nm required an order of magnitude lower specific energy costs as compared to the longwave laser radiation. The high energy efficiency of laser sintering is explained by special conditions for radiation absorption at plasmon resonance.

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Sedlak, Josef, Oskar Zemčík, Martin Slaný, Josef Chladil, Karel Kouřil, Vít Sekerka, and Luboš Rozkošný. "PRODUCTION OF PROTOTYPE PARTS USING DIRECT METAL LASER SINTERING TECHNOLOGY." Acta Polytechnica 55, no. 4 (August 31, 2015): 260. http://dx.doi.org/10.14311/ap.2015.55.0260.

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<p>Unconventional methods of modern materials preparation include additive technologies which involve the sintering of powders of different chemical composition, granularity, physical, chemical and other utility properties. The technology called Rapid Prototyping, which uses different technological principles of producing components, belongs to this type of material preparation. The Rapid Prototyping technology facilities use photopolymers, thermoplastics, specially treated paper or metal powders. The advantage is the direct production of metal parts from input data and the fact that there is no need for the production of special tools (moulds, press tools, etc.). Unused powder from sintering technologies is re-used for production 98% of the time, which means that the process is economical, as well as ecological.The present paper discusses the technology of Direct Metal Laser Sintering (DMLS), which falls into the group of additive technologies of Rapid Prototyping (RP). The major objective is a detailed description of DMLS, pointing out the benefits it offers and its application in practice. The practical part describes the production and provides an economic comparison of several prototype parts that were designed for testing in the automotive industry.</p>

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Jin, Yong Ping, and Ming Hu. "Direct Rapid Manufacturing Technology with Laser for Metal Parts." Advanced Materials Research 328-330 (September 2011): 520–23. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.520.

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Directly driven by CAD model, based on principle of discrete-superposition, rapid prototyping technology is the generic terms of rapid manufacturing 3-dimensional physical entities with any complex shape. One of its main development trends is direct rapid manufacturing for metal parts. Up to now, there are many methods utilizing laser beam containing selective laser melting, selective laser sintering and laser engineered net shaping. Research and development of these means for direct rapid metal manufacturing are presented in this paper. Digital direct rapid manufacturing for metal parts represents development direction of advanced manufacturing technology.

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Wang, Jian Bin, and Qing Sheng Zeng. "Performance Control Research of Oil Distribution Plate Parts by Laser Direct Rapid Forming Based on the Ultrasonic Vibration." Applied Mechanics and Materials 423-426 (September 2013): 951–54. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.951.

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Aims at the performance of the oil distribution plate parts with laser direct rapid forming, and referring to the role of ultrasonic vibration in areas such as casting, welding, sintering etc. , and utilizing the neural networks and the genetic algorithm to optimize the process parameters, the article does the basic research of laser direct rapid forming distribution plate parts based on the ultrasonic vibration. The results indicates that this study can greatly enhance the wear resistance, the corrosion resistance and the fatigue properties etc. of the laser sintering distribution plate parts, having a good guidance to the practical production.

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He, Chong Wen, Hai Hong Zhu, and Pan Pan Hu. "Fabrication of Cu Heat Sink on Silicon Substrate Using Direct Laser Sintering." Materials Science Forum 789 (April 2014): 431–35. http://dx.doi.org/10.4028/www.scientific.net/msf.789.431.

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Silicon is applied widely because of its good electrical properties, thermal conductivity and optical processing. It is necessary to fabricate a heat sink on silicon substrate to improve the heat dissipation ability for modern industrial application. There are many traditional methods of processing heat sink on silicon substrate. However, it is hardly to meet the requirements of today’s technology for the disadvantages such as residual stress exist, processing shape limited and inefficiency. The investigation on fabricating heat sink silicon substrate by direct later sintering was conducted in this study. By sintering a transition layer, coppery heat sink with channel width of several hundred micrometers and circinate shape has been fabricated by direct laser sintering. Furthermore, the bonding mechanism and the influence of the powder components on the interface morphology and structure have been investigated.

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Zhao, J. F., Y. Li, and J. H. Zhang. "Research on Direct Laser Sintering of Ni-Alloy Powder and Microstructure Feature." Materials Science Forum 471-472 (December 2004): 881–85. http://dx.doi.org/10.4028/www.scientific.net/msf.471-472.881.

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The direct laser metal sintering experiments were carried out with nickel alloy powder material system. The melting–solidification approach was discussed. Microstructure and components of DLMS-process sample were analyzed. The incomplete liquid phase sintering is the main mechanism of the melting-solidification approach. In powder material system, the additive copper improves the wettability of melting material, and minimizes the balling phenomenon. The equiaxial dendrite and the dendrite are the primary crystal morphologies. The compositions of materials are distributed uniformly.

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Wang, Xin Hua, Jerry Y. H. Fuh, Yoke San Wong, L. Lu, H. T. Loh, Y. X. Tang, and H. H. Zhu. "Formation of Copper-Based Metal Part via Direct Laser Sintering." Materials Science Forum 437-438 (October 2003): 273–76. http://dx.doi.org/10.4028/www.scientific.net/msf.437-438.273.

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Bertol, Liciane Sabadin, Wilson Kindlein Júnior, Fabio Pinto da Silva, and Claus Aumund-Kopp. "Medical design: Direct metal laser sintering of Ti–6Al–4V." Materials & Design 31, no. 8 (September 2010): 3982–88. http://dx.doi.org/10.1016/j.matdes.2010.02.050.

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Tang, Y., H. T. Loh, J. Y. H. Fuh, Y. S. Wong, and L. Lu. "Direct laser sintering of Cu-based metal for rapid tooling." International Journal of Computer Applications in Technology 28, no. 1 (2007): 63. http://dx.doi.org/10.1504/ijcat.2007.012332.

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Zhu, H. H., L. Lu, and J. Y. H. Fuh. "Study on Shrinkage Behaviour of Direct Laser Sintering Metallic Powder." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 220, no. 2 (February 2006): 183–90. http://dx.doi.org/10.1243/095440505x32995.

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Grünberger, Thomas, and Robert Domröse. "Optical In-Process Monitoring of Direct Metal Laser Sintering (DMLS)." Laser Technik Journal 11, no. 2 (April 2014): 40–42. http://dx.doi.org/10.1002/latj.201400026.

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Attarzadeh, Faridreza, Behzad Fotovvati, Michael Fitzmire, and Ebrahim Asadi. "Surface roughness and densification correlation for direct metal laser sintering." International Journal of Advanced Manufacturing Technology 107, no. 5-6 (March 2020): 2833–42. http://dx.doi.org/10.1007/s00170-020-05194-0.

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Ferrage, Loïc, Ghislaine Bertrand, and Pascal Lenormand. "Dense yttria-stabilized zirconia obtained by direct selective laser sintering." Additive Manufacturing 21 (May 2018): 472–78. http://dx.doi.org/10.1016/j.addma.2018.02.005.

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de Damborenea, J. J., M. A. Arenas, Maria Aparecida Larosa, André Luiz Jardini, Cecília Amélia de Carvalho Zavaglia, and A. Conde. "Corrosion of Ti6Al4V pins produced by direct metal laser sintering." Applied Surface Science 393 (January 2017): 340–47. http://dx.doi.org/10.1016/j.apsusc.2016.10.031.

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Oter, Zafer Cagatay, Mert Coskun, Yasar Akca, Omer Surmen, Mustafa Safa Yilmaz, Gokhan Ozer, Gurkan Tarakci, Hamaid Mahmood Khan, and Ebubekir Koc. "Support optimization for overhanging parts in direct metal laser sintering." Optik 181 (March 2019): 575–81. http://dx.doi.org/10.1016/j.ijleo.2018.12.072.

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Ojala, Leo S., Petri Uusi–Kyyny, and Ville Alopaeus. "Prototyping a calorimeter mixing cell with direct metal laser sintering." Chemical Engineering Research and Design 108 (April 2016): 146–51. http://dx.doi.org/10.1016/j.cherd.2015.11.015.

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Marinov, Valery R. "Electrical Resistance of Laser Sintered Direct-Write Deposited Materials for Microelectronic Applications." Journal of Microelectronics and Electronic Packaging 1, no. 4 (October 1, 2004): 261–68. http://dx.doi.org/10.4071/1551-4897-1.4.261.

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The direct write technology provides an interesting opportunity for plugging blind via holes as a more precise alternative to currently used screen printing processes. This technology provides a complete, void-less filling of the via and fabrication of the interconnects extending from the via in one single step. After deposition, the material is heat treated (sintered) to densify into a highly conductive solid. Sintering is usually accomplished by laser treatment. Some aspects of this relatively new technology, especially these related to the relationships between the laser sintering process and the deposited material properties are still largely unexplored. This paper presents experimental results for the microscale electrical resistance of two silver inks deposited by a direct write method and sintered with a continuous wave Nd:YAG laser. The resistance of the deposited and sintered silver lines and the resistance of the material in the plugged via holes was mapped by the advanced micro four-point probe technique. Results showed that higher laser powers reduce significantly the resistance of the silver inks. The importance of the deposited material sinterability is also emphasized.

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Nandy, Jyotirmoy, Natraj Yedla, Pradeep Gupta, Hrushikesh Sarangi, and Seshadev Sahoo. "Sintering of AlSi10Mg particles in direct metal laser sintering process: A molecular dynamics simulation study." Materials Chemistry and Physics 236 (October 2019): 121803. http://dx.doi.org/10.1016/j.matchemphys.2019.121803.

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Khan, Adeyl, Nicholas Rasmussen, Valery Marinov, and Orven F. Swenson. "Laser Sintering of Silver Nanomaterial on Polymer Substrates." Journal of Microelectronics and Electronic Packaging 5, no. 2 (April 1, 2008): 77–86. http://dx.doi.org/10.4071/1551-4897-5.2.77.

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Direct-write lines deposited on polyimide substrates using silver nanoparticle inks were laser-sintered and compared with similar samples sintered on a hot plate. The lines—30- to 60-μm wide, about 2.4 mm long, and less than a micrometer thick—were laser-sintered by scanning the fundamental wavelength of a continuous-wave Nd:YAG laser along the line. Deposited energy was varied by changing the laser power in addition to the scanning speed, and the resulting bulk resistivity was measured to determine the unsintered, transitional, sintered, and peel-off energy per volume of nanoparticle ink ranges. The bulk resistivity reported was comparable to or better than typical screen-printed conductors, and the elemental composition suggested no thermal damage of the substrate.

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Wang, Jian Bin, Ji Shu Yin, and Bing Huang Chen. "The Process Parameters Modeling and Experimental Study Based on BP Neural Network for Laser Direct Rapid Forming Metal Parts." Advanced Materials Research 156-157 (October 2010): 737–41. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.737.

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Discussed in detail using BP neural network to establish the quantitative relationship model between the process parameters and components density on the laser direct rapid forming (LDRF) metal parts, in which input of single-pass sintering model is: laser power (P), scanning speed (V ) and powder feeding rate (G), performance indicators to measure the width of the sintered layer (W) and height (H); input of multi-pass multi-sintering model is: P、V、G、scan spacing (D) and layer thick ( ), the performance measure for the density of sintered parts，And neural network simulation results and experimental results are analyzed and compared. The results show that using BP neural network model can quantitative analyze the effect on sintering process parameters and the sintering performance, the model for the optimization of LDRF process parameters has built the foundation.

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Dolinsek, Slavko. "Direct Metal Laser Sintering Some Improvements of the Materials and Process." Materials Science Forum 539-543 (March 2007): 2681–86. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.2681.

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For a comprehensive understanding of the direct metal laser sintering (DMLS) process and for the successful introduction of this technology, some investigations related to the characteristics of the powders and the individual sintered layers were therefore performed. Also possibilities of hard coatings deposition for further improvements the wear and temperature resistance of tool inserts, and investigations particularly focused into the industrial applications of DMLS tooling inserts are presented.

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Xiao, Bin, and Yuwen Zhang. "Marangoni and Buoyancy Effects on Direct Metal Laser Sintering with a Moving Laser Beam." Numerical Heat Transfer, Part A: Applications 51, no. 8 (April 9, 2007): 715–33. http://dx.doi.org/10.1080/10407780600968593.

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Ahmed, Gulam Mohammed Sayeed, Irfan Anjum Badruddin, Vineet Tirth, Ali Algahtani, and Mohammed Azam Ali. "Wear resistance of maraging steel developed by direct metal laser sintering." Materials Express 10, no. 7 (October 1, 2020): 1079–90. http://dx.doi.org/10.1166/mex.2020.1715.

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This work presents wear study on maraging steel developed by additive manufacturing using Direct Metal Laser Sintering, utilizing a laser beam of high-power density for melting and fusing the metallic powders. Short aging treatment was given to the specimen prior to the wear tests. The density and the hardness of the 3D printed maraging steel were found to be better than the homogenized-aged 18Ni1900 maraging steel. The wear resistance is an important aspect that influences the functionality of the components. The wear tests in dry condition were performed on maraging steel on pin/disc standard wear testing machine. The design of experiments was planned and executed based on response surface methodology. This technique is employed to investigate three influencing and controlling constraints namely speed, load, and distance of sliding. It has been observed that sliding speed and normal load significantly affects the wear of the specimen. The statistical optimization confirms that the normal load, sliding distance, and speed are significant for reducing the wear rate. The confirmation test was conducted with a 95% confidence interval using optimal parameters for validation of wear test results. A mathematical model was developed to estimate the wear rate. The experimental results were matched with the projected values. The wear test parameters for minimum and maximum wear rate have been determined.

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Journal articles on the topic 'Direct laser sintering'

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