Дисертації з теми "3D powder printing"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-34 дисертацій для дослідження на тему "3D powder printing".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Touma, Rikard, and Nathalie Pettersson. "3D-printing med träEn möjlighet för framtiden?" Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-92364.
Повний текст джерела3D printers have many uses and they have become common in many industries. Today, thistechnology is seen as a possible route to more sustainable construction. The technology isconsidered promising in construction engineering, among other things because it has beenshown that it can reduce material waste and provide shorter production times. To someextent, the technology is already being used for building construction, but then mainly withconcrete.The aim of this study is to describe current knowledge regarding 3D printing with woodbasedpulp and to investigate the possibility of using a wood-based pulp consisting ofsawdust, water and lignin for 3D printing.In order to reach the goal, a combination of literature search and laboratory experiments wasused. The literature search was used both to investigate previously conducted studiesregarding wood-pulp based materials in 3D printing and as inspiration for the ingredients andproportions used in the laboratory experiments.Only studies on wood-based 3D printing were studied. The test objects produced in thelaboratory experiments were evaluated in strength, dimensional stability and adhesion. Theresults of the laboratory work indicate that the produced material can be extruded, but that ithas low tensile strength. The layers bonded well for all tests, while the compressive strengthresults varied. The highest compressive strength was given by the mixture with the highestproportion of lignin and the longest drying time.The conclusion is that the material might be useful, but that the correct area of use should bedetermined, as the material cannot withstand excessive loads.Keywords:
Nur, Hassan Mohammed. "Fabrication of advanced ceramics and selective metallization of non-conductive substrates by inkjet printing." Thesis, Brunel University, 2002. http://bura.brunel.ac.uk/handle/2438/4823.
Повний текст джерелаGoss, Cullen. "SLM 125 Single Track and Density Cube Characterization for 316L Stainless Steel." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2050.
Повний текст джерелаFitzgerald, Shawn. "A pneumatic conveying powder delivery system for continuously heterogeneous material deposition in solid freeform fabrication." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/46072.
Повний текст джерелаGreat improvements are continuously being made in the solid free form fabrication (SFF) industry in terms of processes and materials. Fully functional parts are being created directly with little, if any, finishing. Parts are being directly fabricated with engineering materials such as ceramics and metals. This thesis aims to facilitate a substantial advance in rapid prototyping capabilities, namely that of fabricating parts with continuously heterogeneous material compositions. Because SFF is an additive building process, building parts layer-by-layer or even point-by-point, adjusting material composition throughout the entire part, in all three dimensions, is feasible. The use of fine powders as its build material provides the potential for the Selective Laser Sintering (SLS), ThreeDimensional Printing (3DP), and Freeform Powder Molding (FPM) processes to be altered to create continuously heterogeneous material composition. The current roller distribution system needs to be replaced with a new means of delivering the powder that facilitates selective heterogeneous material compositions. This thesis explores a dense phase pneumatic conveying system that has the potential to deliver the powder in a controlled manner and allow for adjustment of material composition throughout the layer.
Master of Science
Westbeld, Julius. "Investigation of support structures of a polymer powder bed fusion process by use of Design of Experiment (DoE)." Thesis, KTH, Lättkonstruktioner, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-243867.
Повний текст джерелаI detta examensarbete undersöks stödstrukturer för en polymer-pulverbaserad process kallad XXXXXXXX. Dessa strukturer är väsentliga för de flesta aditiv tillverkning. Med hjälp av metoden "Design of Experiment" (DoE) undersöks effekten av flera faktorer på fem industriellt viktiga egenskaper för stödstrukturer. DoE beskriver både planeringen och analysen av experiment. Experimenten planeras i en fraktionerad faktoriell 211-5 design med 64 provexemplar vilket resulterar i en upplösning av IV. Dataanalysen genomförs med hjälp av ANOVA-metoden, med vilken signifikansen av effekter och interaktionseffekter kan undersökas.
Clark, Jared A. "The Effects of Build Orientation on Residual Stresses in AlSi10Mg Laser Powder Bed Fusion Parts." Youngstown State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1578819644598848.
Повний текст джерелаMiller, Jacob T. "Sulfuric Acid Corrosion to Simulate Microbial Influenced Corrosion on Stainless Steel 316L." Youngstown State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ysu151621775594905.
Повний текст джерелаFan, Zongyue. "A Lagrangian Meshfree Simulation Framework for Additive Manufacturing of Metals." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1619737226226133.
Повний текст джерелаGROPPO, RICCARDO. "Sviluppo e Industrializzazione di una macchina LPF e validazione attraverso l'ottimizzazione dei parametri di processo di Ottone CuZn42 e Acciaio Armonico C67." Doctoral thesis, Università degli studi di Modena e Reggio Emilia, 2021. http://hdl.handle.net/11380/1245517.
Повний текст джерелаThe additive manufacturing technologies, from their birth to the first industrial applications, made a big jump in terms of hardware and material development. The continuing research for new markets along with a growing demand have made sure that the costs of such technologies have become more accessible. From the using of polymers to do prototypes to metal powders to do real mechanical parts the concepts are always the same, building the part layer by layer. In terms of money from the eighties to present days the 3D printing process maintain a positive trend with much more increases for the future. In terms of monetary and energy flows during the production of complex parts, the additive manufacturing technologies can have positive increments. Thus the adoption of Additive Manufacturing also simplifies measurement of the manufacturing energy consumption for life cycle inventory assessments. In many traditional supply chains, where reliable estimates of cumulative energy consumption may be unavailable, the adoption of AM allows producers to provide their customers with reliable data on the energy embedded into products or component during the manufacturing stage. It has been shown that selecting the minimum cost configuration in Additive Manufacturing is likely to lead to the secondary effect of minimizing process energy consumption. My PhD thesis will discuss a specific additive manufacturing technology, based on the powder bed fusion process using a LASER as a melting source. The main construction components present in the prototype machine will be analyzed, looking for the main critical issues (filtering and powder recovery system, black powder abatement system, in-chamber gas flow, measurement of load losses in the characteristic sections of the plant, powder collection system, distribution and powder deposition system on the printing plate) and, if these cause a crash or an irregularity in the quality in the printed component, a radical modification or replacement of this component will develop. Once the mechanical stability of the entire machine has been verified, the mechanical properties of the samples obtained with stainless steel X2CrNiMo17-12-2 - AISI316L, CuZn42 brass powder and C67 steel - Tempered steel will be analyzed. The main mechanical properties required for a component built for additive manufacturing are in terms of mechanical strength porosity, density, hardness, ultimate tensile strength, and yield tension. Measurements of the density of the specimen will be carried out by measuring the relative volumetric density by Archimedes method. Subsequently, the quality of surface roughness will be measured through the acquisition of maps by means of an optical microscope and through an image analysis software the average surface roughness will then be measured. The same sample will then be used to measure the average hardness of the material by means of a durometer. To test the ultimate tensile strength and the yield strength, samples with circular section will be produced to which an analog extensometer will be mounted. Data processing software processes the strain -strain curve.
Ramírez, Jiménez Guillermo. "Electric sustainability analysis for concrete 3D printing machine." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-258928.
Повний текст джерелаNumera blir tillverkningstekniken alltmer medveten om effektivitet och hållbarhet. En av dem är den så kallade 3Dutskriften. Medan 3Dutskrift ofta är kopplad till plast, är verkligheten att det finns många andra material som testas, vilket kan ha flera förbättringar över plast.Ett av dessa alternativ är sten eller betong, vilket är mer lämpligt inom arkitektur och konstnärliga fält. På grund av sin natur inbegriper denna nya teknik användningen av nya tekniker jämfört med de vanligare 3Dskrivarna. Detta innebär att det kan vara intressant att veta hur mycket mer energieffektiva dessa tekniker är och hur de kan förbättras i framtida revisioner.Denna avhandling är ett försök att studera och analysera de olika enheter som utgör en av dessa skrivare och med denna information, bygga en modell som exakt beskriver dess beteende.För detta ändamål mäts effekten på många punkter och senare analyseras och anpassas den till en fördefinierad funktion. Efter anpassning har gjorts beräknas felet för att visa hur exakt modellen är jämfört med originaldata.Det visade sig att många av dessa enheter producerar spänningsspikar på grund av dess olinjära beteende. Detta beteende är vanligtvis relaterat till omkoppling och kan undvikas med olika enheter.Slutligen ges några råd om framtida forskning och revideringar, vilket kan vara till hjälp för säkerhet, effektivitet och kvalitet.
Cestari, Francesca. "3D printing of bone scaffolds using powders derived from biogenic sources." Doctoral thesis, Università degli studi di Trento, 2023. https://hdl.handle.net/11572/363403.
Повний текст джерелаMa, Da. "Improving the Strength of Binder Jetted Pharmaceutical Tablets Through Tailored Polymeric Binders and Powders." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/101030.
Повний текст джерелаM.S.
Three-dimensional printing is well-known as 3D printing. 3D printing pills are printed from the 3D printer. As of today, we now stand on the brink of a fourth industrial revolution. By the remarkable technological advancements of the twenty-first century, manufacturing is now becoming digitized. Instead of using a large batch process as traditional, customized printlets with a tailored dose, shape, size, and release characteristics could be produced on- demand. The goal of developing pharmaceutical printing is to reduce the cost of labor, shorten the time of manufacturing, and tailor the pills for patients. And have the potential to cause a paradigm shift in medicine design, manufacture, and use. This paper aims to discuss the current and future potential applications of 3D printing in healthcare and, ultimately, the power of 3D printing in pharmaceuticals.
Zhao, Kunchen. "3D Printed Frequency Scanning Slotted Waveguide Array with Wide Band Power Divider." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555589955819802.
Повний текст джерелаThienen, Stefan, and Thomas Gellner. "Flexible and easy to engineer servo-hydraulic actuators using 3D printing manufacturing process." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71208.
Повний текст джерелаStephenson, Joshua A. "A Study of RF/Microwave Components Using Fused Deposition Modeling and Micro-Dispensing." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6955.
Повний текст джерелаSharan, Kumar Varun. "Study of Binding Copper Powders by Electrochemical Deposition." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1471346137.
Повний текст джерелаWienhausen, Arne Hendrik [Verfasser], Doncker Rik W. [Akademischer Betreuer] De, and Andrei [Akademischer Betreuer] Vescan. "High integration of power electronic converters enabled by 3D printing / Arne Hendrik Wienhausen ; Rik W. de Doncker, Andrei Vescan." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1220082368/34.
Повний текст джерелаFeng, Ziang. "Wearable Power Sources and Self-powered Sensors Based on the Triboelectric Nanogenerators." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/103020.
Повний текст джерелаPh.D.
Portable electronic devices have become important components in our daily lives, and we are entering the era of the Internet of Things (IoTs), where everyday objects can be interconnected by the internet. While electricity is essential to all of these devices, the traditional power sources are commonly heavy and bulky and need to be recharged or directly connected to the immobile power plants. Researchers have been working to address this mismatch between the device and power systems. The triboelectric nanogenerators (TENG) are good candidates because they can harvest energy in the ambient environment. The users can use them to generate electricity by merely making the rubbing motion. In this work, we report two fabrication methods of the fiber-based triboelectric nanogenerators (FTENG). With the thermal drawing process, we have fabricated sub-kilometer-long FTENG and wove it with the regular cotton yarn into textiles. The wearable power source is human friendly as it does not induce any extra weight load for the user. Besides, we have demonstrated that such long fibers can work as self-powered distributed sensors, such as a Morse code generator. With 3D printing, we have fabricated FTENG-based devices that conform to the working substrates, which can be any shape. We have employed them as biofriendly sensors to translate the chin movement during speaking to language and to monitor the perfusion rate of a pig kidney. The FTENGs have offered excellent comfortability to the users and can play a vital role in reframing the power structure to be compatible with IoTs.
Stratton, John W. i. "A Study of Direct Digital Manufactured RF/Microwave Packaging." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/6031.
Повний текст джерелаBeckmann, Bastian. "Additive manufacturing of hydraulic manifolds - a holistic approach across the entire value chain." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71083.
Повний текст джерелаThompson, John Ryan. "RELATING MICROSTRUCTURE TO PROCESS VARIABLES IN BEAM-BASED ADDITIVE MANUFACTURING OF INCONEL 718." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1401699643.
Повний текст джерелаKuntz, Sarah Louise. "Feasibility of Attaining Fully Equiaxed Microstructure through Process Variable Control for Additive Manufacturing of Ti-6Al-4V." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1464557846.
Повний текст джерелаLin, Jiou-Wei, and 林久瑋. "3D metal powder printing sintering parameter studies." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/vbf7f7.
Повний текст джерела國立虎尾科技大學
機械與電腦輔助工程系碩士班
105
In the current industry, integrated manufacturing is highly competitive. As 3D printing continue to develop, the techniques and output value are also expending. In the present domestic market, 3D printing with PLA or ABS filament wires are the most common materials. Due to the low-cost and easy operation, the machine is often purchased by schools as a teaching tool. As for the metal 3D printing, it needs to insert protective gas in a closed off space, through laser sintering and stack-build to create an object with metal powder, although such techniques can produce complex parts, very few technical developments are found in the domestic market due to the high cost. The purpose of this study is to focus on the research of 3D metal powder sintering techniques and process. Through laser sintering experiments with different metal powder mixtures to confirm possible powder sintering, then use different laser power, scanning speeds, frequencies and path spacing parameters to conduct powder sintering experiments under different experimental conditions. By using optical microscope and Vickers Hardness tester to verify sintering products and using Taguchi method to find out best parameter combinations. The conclusions of the study are summarized as follow 1.In this study, the powder mixing mechanism was designed and used, the ratio of copper and tin powder for the mixing mechanism was 18: 1 2.If the scanning rate is higher than 30mm/s, the powder indicates insufficient temperature and shows a splash phenomenon which is not conducive to sintering. This will subsequently impact on the porosity and hardness analysis experiments. 3.Through Taguchi analysis, the best combine parameters for pore-space were found. The best pore-space is 4.712%, the laser power is 80%, and the scanning speed is 7mm/s, the frequency is 30k, and the path-space is 0.05mm. 4.Through Taguchi analysis, the best combine parameters for Vickers Hardness were found. The best pore-space is 134.423HV, the laser power is 100%, the scanning speed is 7mm/s, the frequency is 33K, and the path-space is 0.07mm.
Jhao, Hong-Jin, and 趙宏晉. "3D Printing Plate with Residual Powder Removing System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/06107652028235160423.
Повний текст джерела國立雲林科技大學
機械工程系
103
Traditionally, the residual powder removing process after selective laser sintering can’t be the finished in the selective laser sintering platform. However, the residual powder removing process always causes the material powder dusty. The dust has an adverse effect on the mechanical systems. In addition, it will also cause indoor pollution. The operator must wear the mask to avoid dust into the lungs. In this thesis, the development of building platform with residual powder removing system is presented. The objective is to improve the material powder dusty problem and avoid the indoor pollution during the residual powder removing process. The design concept is to build in a residual powder removing system in the selective laser sintering platform. The residual powder can be removed in the selective laser sintering platform after the sintering process. It will avoid indoor pollution problem and reduce health hazards to the operators. In addition, the increasing sintering area design is also presented in this thesis. This study starts with the patent analysis to avoid the patent infringement. SolidWorks and AYSYS Workbench are used to design and evaluate the structure parts. A prototype of the building platform with residual powder removing system is fabricated. Some experiments are also carried out in this study to confirm the feasibility of the system.
LIU, WEI HUNG, and 劉威宏. "Polymer materials for plaster powder type 3D Printing." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/fsbh47.
Повний текст джерела國立臺北科技大學
分子科學與工程系有機高分子博士班
105
3D printing is a fast manufacturing process in recent years and is therefore a popular research project. Binder jetting is a very growth technology, the molding material in the slot, according to the cut out of the output of the image file, and then use the printer. The nozzle sprayed glue, need to cure part of the adhesion together, and then covered with a layer of new powder layer, once again ejected the glue will be powder adhesion, cycle until the full shape so far, most of the absorbent material can be used as powder 3D print Materials, and according to different materials can be applied to the manufacturing process will be different, Binder Jetting 3D printing industry can be said that is worth further development of one of the technologies. Although the technology of Binder Jetting is now known to reach 0.1mm, but according to the use of gypsum material of the machine physical test and relevant test found that the real can achieve the precision is between 0.15 to 0.2mm , And the material will have the collapse of the shortcomings of the formation, this article is to explore the gypsum is added after the modification of polymer materials, whether the accuracy can be improved, as well as the strength and ductility of the shape of the discussion.
Hu, Shu-Rui, and 胡書睿. "The Development of 3D Metal Powder Printing Mechanism." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/m47dk8.
Повний текст джерела國立虎尾科技大學
機械與電腦輔助工程系碩士班
104
Since 2008, 3D printing technologies have been enhanced considerably following the expiration of 3D printing patents. Previously, 3D printers were limited to providing product proofs for designers; current technologies overcome challenges typically associated with manufacturing difficulties, the inability to process directly, and lengthy lead times because 3D printers can directly print components for end products. This study modified the structure of existing 3D printers to construct a 3D metallic powder-sintering device through integrating printing processing technology with metallic powders The structure included a powder feeder, compacting mechanism, and substrate-plate lifting mechanism. Copper was used as the powder material for selective laser sintering. The substrate plate was covered with an evenly distributed layer of metallic powder, which was levelled using a flattener The sintering device fused the selected objects by selectively sintering the metallic powder with a laser beam, and the feeding mechanism distributed a new layer of powder after the substrate plate was lowered. The steps of feeding, levelling, and laser sintering were repeated until the final product was produced. A dial indicator was employed to measure the repeatability of the x- and z-axes. Through the powder-feeding experiment, we determined that the thickness of each layer of the sintered body can be adjusted between 0.1 and 0.4 mm to ensure the feasibility of a simple 3D metallic powder-sintering mechanism. Furthermore, in the powder-sintering experiments, parameters such as the laser power, velocity, frequency, and path interval were adjusted An electron microscope and Vickers hardness tester were employed to inspect the sintered products after the sintering experiment. The Taguchi method was used to obtain the optimal combination of parameters.
Mandal, Sourav. "Fabrication, micro-computed tomography based quantitative 3D microstructure evaluation of 3D printed bioceramic scaffolds and FE modelling of biomedical implant prototypes." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/5337.
Повний текст джерелаYANG, CHI-WEN, and 楊琦雯. "A Molecular Dynamic Study on Laser Powder Bed Fusion Additive Manufacturing (3D Printing) Process Using Nanoscale Copper Powder." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3u9zk3.
Повний текст джерела嘉南藥理大學
應用空間資訊系
106
In this present study, the molecular dynamics investigations on solid and hollow spherical copper nanoscale powders during the laser powder bed fusion additive manufacturing (3D printing) process are exhibited under different powder sizes and heating rates. The sizes of copper powders are varied from 12a, 18a and 24a, respectively. The six combinations of both solid and hollow spherical two-powder-model are chosen, respectively. The common neighbor analysis, neck width, mean square displacement, and gyration radius are utilized to investigate the nanoscale physical properties, which are coalescence and melting temperature, of copper powders under laser sintering process. Whatever solid or hollow spherical copper powders, we found that the solid-state sintering automatically takes place at room temperature. Moreover, except that the powder size and the heating rate of metal powder significantly affect the physical properties, the result of this study also shows that the geometry of the nanoscale powders is also an important role in the 3D printing process.
CHIANG, YU-WEN, and 江育文. "Molecular Dynamics Investigations on Characteristics in Laser Powder Bed Fusion Additive Manufacturing(3D Printing) of Titanium and Tantalum Nanoparticles under Different Heating Rates." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/97553202531272395339.
Повний текст джерела南臺科技大學
機械工程系
104
In the present study, the molecular dynamics investigations on physical characteristics of solid and hollow spherical titanium and tantalum nanoparticles during laser powder bed fusion additive manufacturing (3D Printing) process are exhibited under different sizes and heating rates. As for titanium, the sizes of titanium nanoparticles are varied from 16a, 20a and 24a, respectively. In addition, the sizes of tantalum nanoparticles are varied from 10a, 16a and 24a, respectively. Regarding both titanium and tantalum, the six combinations of both spherical solid and hollow two-nanoparticle-model are chosen, respectively. The bond angle, neck width, potential energy and gyration radius are utilized to realize the physical properties of nanoscale metallic powders under laser sintering process. Whatever solid or hollow titanium and tantalum nanoparticles, the present results show that the solid state sintering automatically takes place at room temperature. The temperatures of phase change, coalescence, melting of titanium nanoparticle decreased with particle diameter decreasing, but increased with heating rate increasing. Moreover, the temperatures of phase change, coalescence, melting of hollow spherical titanium nanoparticle are also lower than those of solid ones. Meanwhile, we also found that the temperatures of coalescence and melting of tantalum nanoparticle decreased with particle diameter decreasing, but increased with heating rate increasing. At the same time, the temperatures of coalescence and melting of nanoscale hollow tantalum nanoparticle are lower than those of solid ones, also. It is found that the phase change temperature (1220K-1325K) of nanoscale titanium is a little higher than that of bulk titanium, 1155K. Nevertheless, the melting temperature (1200K-1350) of nanoscale titanium is much lower than the melting point of bulk titanium, 1940K. At the same time, it is also found that the melting temperature (2400K-3000K) of nanoscale tantalum is much lower than the melting point of bulk tantalum, 3290K.
LI, CHAO-CHEN, and 李兆宸. "Molecular Dynamics Investigations on Characteristics of Nanoscale Pure Niobium, Pure Zirconium and Binary Alloy Niobium-Zirconium Metal Powders Applied to Powder Bed Fusion 3D Printing During Laser Heating Process." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/dcptd7.
Повний текст джерела南臺科技大學
機械工程系
106
In this present study, the physical characteristics of nanoscale niobium zirconium alloy powder applied on the powder bed fusion laser sintering is computed during 3D printing process by molecular dynamics simulation method with embedded atom method potential. Simulation of solid nanoscale base metals with six sets of double-ball models (5.28nm-5.28nm, 5.28nm-6.6nm, 6.6nm-6.6nm, 5.28nm-7.92nm, 6.6nm-7.92nm, 7.92nm-7.92nm) Powder, hollow nanoscale pure niobium metal powder; with six sets of double-sphere models (5.17nm and 5.17nm, 5.17nm and 6.46mn, 5.17nm and 7.75nm, 6.46nm and 6.46nm, 6.46nm and 7.75nm, 7.75nm 7.75nm) simulated solid nanoscale pure zirconium metal powder; with six sets of double-sphere models (5.57nm-5.57nm, 5.57nm-6.96nm, 6.96nm-6.96nm, 5.57nm-8.35nm, 6.96nm-8.35nm, 8.35) Nm-8.35nm) simulation of solid nanoscale binary alloy niobium-zirconium metal powders,that are created and laser-sintered under different heating rates (1K/ps, 0.5K/ps, and 0.25K/ps, respectively), and then the neck width, radius of gyration, structural change, potential energy, and root mean square displacement of nanoscale powder are analyzed and discussed. It is found that nanoscale powder has the phenomena of spontaneous solid-state sintering at room temperature. Average coalescence temperature and melting temperature decrease with heating rate dreasing when powder size fixed, and they decrease with powder size decreasing when heating rate fixed also. Therefore, it is suggested that the power of laser beams could be lower during 3D printing process in order to heat nanoscale niobium zirconium alloy powder.
Yu-YangHuang and 黃昱陽. "Analysis of Heat Affected Zone in Steel Powder and Simulation of Heat Transfer in the Worked Zone by Selective Laser Melting for 3D Printing Applications." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/65580925323921314975.
Повний текст джерела國立成功大學
機械工程學系
104
This study focuses on selective laser melting (SLM) process, the melting zone of the powder and heat affected zone of the substrate influence the quality of 3D printing objects. In the present study, the controlling factors of SLM process are the laser power, laser scanning velocity, and thickness of powder bed. Because the technology of SLM is developing, the finite element model of SLM process is necessary to forecast the results. In order to check the accuracy of the simulational model, the experiment with same conditions is used to contrast two results. In this case, the material of powder is SKD61, and the substrate is S45C. After SLM printing, the depth, width, and length of melting zone, and heat affected zone of the substrate are measured to realize the influence of laser controlling parameters. Meanwhile, discussing the tendency for different combinations of laser parameters.
Barui, Srimanta. "Understanding quantitative process physics of 3D binderjet printing with validation in Ti-6Al-4V and inkjet bioprinting of mammalian cells." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4615.
Повний текст джерелаDepartment of Science and Technology (DST), Govt. of India, and particularly FIST funding; Department of Biotechnology ( DBT), Govt. of India; National Network for Mathematical and Computational Biology (NNMCB), SERB, Govt. of India; Commonwealth Scholarship Commission, UK; The cell printing and culture facility of Department of Materials, University of Manchester and Diamond Synchrotron facility (DLS, Oxfordshire), UK
Fan, Wen-Hsuan, and 范文軒. "A Study of Critical Success Factors of 3D Printing Applied to Power Plants." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/26696949510238453305.
Повний текст джерела國立中興大學
資訊管理學系所
105
In response to the global green energy trends and the development of innovative technology, the use of 3D printing technology for the manufacture of energy-saving carbon reduction of energy facilities is gradually a growing trend. This study explores the relationship between the current status and the development trends of global renewable energy and the application of 3D printing technology through literature analysis and case study. According to analyze the meaning of the three relevant cases of 3D printing applications by using the PEST model and the expert interview method. We propose the critical success factors of 3D printing applied to power plants. The conclusions and recommendations of this paper are as follows: Industry, official, scholar and researcher should cooperate with each other to achieve "mutual link." The Government should formulate appropriate policies to promote the development of 3D printing technology in line with "cost-effective" power plants. At the same time the use of 3D printing technology features and advantages, combined with traditional manufacturing experiences and innovative applications to accelerate product development and commercialization, the revitalization of related industries, enhance the international market competitiveness.
Song, Jiaxi. "Harnessing the power of light in nanopore sensing and biomedical 3D printing applications." Thesis, 2021. https://hdl.handle.net/2144/41888.
Повний текст джерела2023-01-18T00:00:00Z