Relevant bibliographies by topics / (SLS); Direct Powder Extrusion

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  2. Dissertations / Theses
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Academic literature on the topic '(SLS); Direct Powder Extrusion'

Author: Grafiati
Published: 7 June 2025
Last updated: 2 August 2025

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Journal articles on the topic "(SLS); Direct Powder Extrusion"

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Boniatti, Janine, Patricija Januskaite, Laís B. da Fonseca, et al. "Direct Powder Extrusion 3D Printing of Praziquantel to Overcome Neglected Disease Formulation Challenges in Paediatric Populations." Pharmaceutics 13, no. 8 (2021): 1114. http://dx.doi.org/10.3390/pharmaceutics13081114.

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For the last 40 years, praziquantel has been the standard treatment for schistosomiasis, a neglected parasitic disease affecting more than 250 million people worldwide. However, there is no suitable paediatric formulation on the market, leading to off-label use and the splitting of commercial tablets for adults. In this study, we use a recently available technology, direct powder extrusion (DPE) three-dimensional printing (3DP), to prepare paediatric Printlets™ (3D printed tablets) of amorphous solid dispersions of praziquantel with Kollidon® VA 64 and surfactants (Span™ 20 or Kolliphor® SLS).
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Carreira, Pedro, Fábio Cerejo, Nuno Alves, and Maria Teresa Vieira. "In Search of the Optimal Conditions to Process Shape Memory Alloys (NiTi) Using Fused Filament Fabrication (FFF)." Materials 13, no. 21 (2020): 4718. http://dx.doi.org/10.3390/ma13214718.

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This research was performed so as to investigate the additive manufacturing of NiTi shape memory alloys, which is associated with direct processes, such as selective laser melting. In addition to its expensive production costs, NiTi readily undergoes chemical and phase modifications, mainly as a result of Ni loss during processing as a result of high temperatures. This research explores the potential usefulness of NiTi as well as its limitations using indirect additive processes, such as fused filament fabrication (FFF). The first step was to evaluate the NiTi critical powder volume content (C
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Kleijnen, Rob, Manfred Schmid, and Konrad Wegener. "Production and Processing of a Spherical Polybutylene Terephthalate Powder for Laser Sintering." Applied Sciences 9, no. 7 (2019): 1308. http://dx.doi.org/10.3390/app9071308.

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This work describes the production of a spherical polybutylene terephthalate (PBT) powder and its processing with selective laser sintering (SLS). The powder was produced via melt emulsification, a continuous extrusion-based process. PBT was melt blended with polyethylene glycol (PEG), creating an emulsion of spherical PBT droplets in a PEG matrix. Powder could be extracted after dissolving the PEG matrix phase in water. The extrusion settings were adjusted to optimize the size and yield of PBT particles. After classification, 79 vol. % of particles fell within a range of 10–100 µm. Owing to i
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Sing, Swee Leong, Wai Yee Yeong, Florencia Edith Wiria, et al. "Direct selective laser sintering and melting of ceramics: a review." Rapid Prototyping Journal 23, no. 3 (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 dir
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Tricker, D., M. Jackson, and R. Dashwood. "Direct extrusion of titanium alloy powder." Materials Technology 24, no. 3 (2009): 174–79. http://dx.doi.org/10.1179/106678509x12475882915411.

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Ryabicheva, Lyudmila, Dmytro Usatyuk, and Nikolaj Beloshitskij. "Modeling of Direct Extrusion of Porous Powder Billets." Advanced Materials Research 566 (September 2012): 267–70. http://dx.doi.org/10.4028/www.scientific.net/amr.566.267.

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The computer modeling results for direct extrusion of porous powder billets on a basis of the plasticity theory relations are presented. Distributions of stress-strain state parameters and density during direct extrusion of hollow detail from copper powder billet have obtained. The optimal value of backpressure, that ensures a uniform stress-strain state and given density of detail have found. The dependences of backpressure value from relative depth of cavity and extrusion pressure from backpressure are recommended.
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Zubizarreta, C., I. Arribas, S. Giménez, and I. Iturriza. "Softening-Hardening Mechanism in the Direct Hot-Extrusion of Aluminium Compacts." Materials Science Forum 534-536 (January 2007): 837–40. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.837.

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Powder compacts from two different commercial aluminium powder grades have been densified by direct hot extrusion. The extrusion runs have been carried out at 425 °C, with an extrusion ratio of 1:16 and a ram speed of 1.5 mm/s. Prior to extrusion, some green compacts were presintered (500 °C). The evolution of the extrusion load during the process and the hardness of the final products have been investigated. Additionally, microstructural characterization by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Electron Backscattered Diffraction (EBSD) was carried out in order to und
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L. Amorim, Fred, Armin Lohrengel, Volkmar Neubert, Camila F. Higa, and Tiago Czelusniak. "Selective laser sintering of Mo-CuNi composite to be used as EDM electrode." Rapid Prototyping Journal 20, no. 1 (2014): 59–68. http://dx.doi.org/10.1108/rpj-04-2012-0035.

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Purpose – This work is focused on the investigation of direct production of electrical discharge machining (EDM) electrodes through the selective laser sintering (SLS) technique using a new metal-matrix composite material made of molybdenum and a copper-nickel alloy (Mo-CuNi). The influence and optimization of the main SLS parameters on the densification behavior and porosity is experimentally studied. Additionally, EDM experiments are performed to evaluate the electrodes performance under different machining conditions. The paper aims to discuss these issues. Design/methodology/approach – The
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Rjabicheva, L. A., and D. A. Usatjuk. "Modeling the evolution of the deformation zone under various extrusion schemes." Izvestiya MGTU MAMI 7, no. 2-2 (2013): 120–24. http://dx.doi.org/10.17816/2074-0530-68103.

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Using the simulation results it was shown an optimal correlation of the size and porosity of powder compacts and also the amount of counterpressure recommended for the production of equal channel angular extrusion of workpieces with high-density of deformation zone that is large enough for subsequent direct extrusion powder of parts with high mechanical properties.The article defines the maximum depth of the cavity in direct extrusion through the research of plasticity resource. This paper describes the developed technology of manufacturing high-density parts of the "glass" type with the consi
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Gorenko, М. V. "Chemical Method of Receipt of Powder-Like Mixtures of Copper Crystals (Cu) -Nano, Micro Dispersion of for Reinforcement of Polymeric Compositions are Used as Materials for Printing 3D." Фізика і хімія твердого тіла 17, no. 2 (2016): 269–74. http://dx.doi.org/10.15330/pcss.17.2.269-274.

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We consider possibility of the chemical process of obtaining crystals of copper powder mixtures -nano, micro dispersion of for reinforcement of polymeric compositions are used as materials for printing 3D thermo-extrusion method, is given determination the physic and to mechanical properties of the resulting material, depending on the filler, we offer a method to reduce the porosity of products for the SLS technology, DMLS,investigated kinds of crystal structures of copper (Cu) and crystallization process copper (Cu) with -nano phase in solution H2O.
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Dissertations / Theses on the topic "(SLS); Direct Powder Extrusion"

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Pereira, João Miguel Júnior Loja. "Direct digital manufacturing of products based on high content of stone powder." Master's thesis, 2021. http://hdl.handle.net/10400.8/5682.

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Residue creation from industrial transformation processes are the focus of circular economy studies with the intent to boost revenue and improve environmental impact. As in the case of stone sludges and powders, residue elimination or re-usage, would bring forth reductions in post processing costs, improve environmental impact, as well as adding new revenue streams with added products to the companies portfolio. This project aims to develop a technical road-map of materials and processes for stone residues and powders, in which they are incorporated and transformed into new products, via
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(5931092), Ehsan Maleki Pour. "Innovative Tessellation Algorithm for Generating More Uniform Temperature Distribution in the Powder-bed Fusion Process." Thesis, 2019.

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<div>Powder Bed Fusion Additive Manufacturing enables the fabrication of metal parts with complex geometry and elaborates internal features, the simplication of the assembly process, and the reduction of development time. However, the lack of consis-tent quality hinders its tremendous potential for widespread application in industry. This limits its ability as a viable manufacturing process particularly in the aerospace and medical industries where high quality and repeatability are critical. A variety of defects, which may be initiated during the powder-bed fusion additive manufacturing proce
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Maleki, Pour Ehsan. "Innovative Tessellation Algorithm for Generating More Uniform Temperature Distribution in the Powder-bed Fusion Process." Thesis, 2018. http://hdl.handle.net/1805/17386.

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Purdue School of Engineering and Technology, Indianapolis<br>Powder Bed Fusion Additive Manufacturing enables the fabrication of metal parts with complex geometry and elaborates internal features, the simplification of the assembly process, and the reduction of development time. However, the lack of consistent quality hinders its tremendous potential for widespread application in industry. This limits its ability as a viable manufacturing process particularly in the aerospace and medical industries where high quality and repeatability are critical. A variety of defects, which may be initiated
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Books on the topic "(SLS); Direct Powder Extrusion"

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Bauser, M., G. Sauer, and K. Siegert, eds. Extrusion. 2nd ed. Translated by A. F. Castle. ASM International, 2006. http://dx.doi.org/10.31399/asm.tb.ex2.9781627083423.

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Extrusion, Second Edition provides a complete and thorough overview of the processes, equipment, and tooling used to extrude metals into desired shapes and forms. It covers all types of processes, including direct, indirect, and hydrostatic extrusion, cable sheathing, continuous extrusion, and the extrusion of powder metals. It describes each process in detail, explaining how the associated forces, stresses, displacements, and heat cause metals to deform and flow and how it affects the microstructure and properties of the resulting products. It discusses the design, setup, and control of extru
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Book chapters on the topic "(SLS); Direct Powder Extrusion"

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Zubizarreta, C., I. Arribas, S. Giménez, and I. Iturriza. "Softening-Hardening Mechanism in the Direct Hot-Extrusion of Aluminium Compacts." In Progress in Powder Metallurgy. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.837.

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Do, Quang Duy, Du Khac Nguyen, Tung Van Nguyen, Lan Xuan Phung, and Trung Kien Nguyen. "Effect of Printing Parameters on Characteristics of PCL Scaffold Fabricated by Direct Powder Extrusion." In Advances in Engineering Research and Application. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-22200-9_51.

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Ryabicheva, Lyudmila, and Dmytro Usatyuk. "Computer Modelling of Radial-Direct Extrusion of Porous Powder Billets." In Computational and Numerical Simulations. InTech, 2014. http://dx.doi.org/10.5772/57142.

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Kargozar, Saeid, Masoud Mozafari, Frazad Kermani, Peiman Brouki Milan, and Francesco Baino. "Additive Manufacturing of Bioactive Glasses: Focus on Bone Tissue Engineering." In Bioceramics: Status in Tissue Engineering and Regenerative Medicine (Part 2). BENTHAM SCIENCE PUBLISHERS, 2024. https://doi.org/10.2174/9789815313895124010005.

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In tissue engineering and regenerative medicine, bioactive glasses (BGs) offer many potential advantages. These inorganic substances belong to the bioceramics family and are traditionally produced in powder and granular formats via the sol-gel and melt-quenching synthesis routes. In order to mimic the native structure of human tissues, BGs should be fabricated into three-dimensional (3D) constructs (i.e., scaffolds). There are specific conventional fabrication methods for producing BGbased scaffolds (e.g., foam replication); however, they suffer from some critical limitations such as the lack
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Conference papers on the topic "(SLS); Direct Powder Extrusion"

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Fonta, Didier, and Thibaud Deshons. "Additive Manufacturing Of Metal Parts Using Industrial MIM Feedstocks." In World Powder Metallurgy 2022 Congress & Exhibition. EPMA, 2022. http://dx.doi.org/10.59499/wp225371995.

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Huang, Shuigen, Eric Wong, Berfu Göksel, Jun Qian, and Jozef Vleugels. "Direct Ink Writing Of Open And Dense NbC-Ni Matrix Cermet Structures." In World Powder Metallurgy 2022 Congress & Exhibition. EPMA, 2022. http://dx.doi.org/10.59499/wp225368559.

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Direct Ink Writing (DIW), also known as robocasting, is a paste extrusion-based layer-by-layer additive manufacturing technique suitable for manufacturing complex geometry green compacts. In this study, NbC-Ni matrix cermets with either a porous scaffold structure or a pore-free rectangular bar geometry were prepared using a combination of DIW and sintering. The water based feedstock ink contained 40 vol% cermet powder mixture and 25 wt% pluronic F-127 hydrogel. The ink was rheologically characterized and printed using a DIW device. Thermogravimetric analysis (TGA) of the paste was performed t
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Amorim, Fred Lacerda, Tiago Czelusniak, and Camila Higa. "Electrical Discharge Machining Electrodes Manufactured via Selective Laser Sintering Technique Using New Composite Materials." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62345.

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The cost of a part manufactured by Electrical Discharge Machining (EDM) is mainly determined by electrode cost. The production of electrodes by conventional machining processes is complex, time consuming and can account for over fifty percent of the total EDM process costs. The emerging Additive Manufacturing (AM) technologies provide the possibility of direct fabrication of EDM electrodes. Selective Laser Sintering (SLS) is an alternative AM technique because it has the possibility to directly produce functional components, reducing the tool-room lead time and total EDM costs. The main diffic
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NEZIC, N. "Development of a new method utilizing semi-solid aluminum wires for extrusion based additive manufacturing." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-9.

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Abstract. In the field of additive manufacturing (AM) technologies, the development of metal-based extrusion processes constitutes a significant industrial trend in the recent years. Respective processes are differentiated into powder bed, powder-fed and wire-fed depending on the used feedstock. Among those, powder-fed AM represents the most widely used approach, despite its physical limitations leading to intense thermal gradients and an uncontrollable defective microstructure of produced parts. In this context, extrusion-based AM using a wire semi-finished product in the semi-solid state off
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Yang, Jialin, Chao Xu, and Yang Wang. "An Investigation on Top Surface Quality for Direct Metal Laser Fabrication." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50052.

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SLS (Selective Laser Sintering) has been developing rapidly since its initial invention for non-metal materials by Texas University. Nowadays, Direct Metal Laser Fabrication (DMLF), as a variant of SLS technique, has been investigated intensively which is aimed at rapid manufacturing of end-use metal products with full functions. For describing the stability and properties of DMLF process, Top Surface Quality (TSQ) was put forward in this paper, which could be a unique and crucially important feature compared with traditional manufacturing methods. Through the systematic and detailed analysis
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Gatões, Daniel, Luis Cacho та M. T. Vieira. "μCT Non-destructive Testing Of Additively Manufactured 3Dobjects As Support For True Sustainability". У Euro Powder Metallurgy 2023 Congress & Exhibition. EPMA, 2023. http://dx.doi.org/10.59499/ep235764060.

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Additive Manufacturing is an essential process for novel geometries. However, complex parts demand a new perspective in defects control and support for the modelling of mechanical behaviour to assess the applicability of the 3D object to the conditions of the application. Therefore, non-destructive testing is essential for the evaluation of the role of stochastic defects (size, shape, and homogeneous distribution) on the mechanical properties of AM 3D objects. In this study, a wide evaluation of μCT (micro-computed tomography) for two metallic additive manufacturing processes – material extrus
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Staufer, Ella, Christian Edtmaier, Elisabeth Ballok, et al. "Development of High Strength Ti-Cu based alloys with Equiaxed Grain Growth Produced via Plasma Metal Deposition." In Euro Powder Metallurgy 2024 Congress & Exhibition. EPMA, 2024. http://dx.doi.org/10.59499/ep246278391.

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The growing demand for titanium alloys, particularly in the aerospace industry, arises from their remarkable strength-to-weight ratio. However, the commonly used Ti-6Al-4V (Ti64) alloy exhibits columnar grain growth after additive manufacturing, such as powder bed fusion or direct energy deposition, resulting in anisotropic mechanical properties. To overcome this, Ti-Cu-based alloys are introduced for equiaxed grain growth, but their mechanical properties fell short of Ti64. \n Ternary and quaternary alloying elements (Fe and Cr) are incorporated to enhance mechanical properties. Firstly, seve
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Karevan, Mehdi, and Kyriaki Kalaitzidou. "Characteristics of Exfoliated Graphite Nanoplatelets-Polyamide12 Nanocomposites Processed by Extrusion Injection Molding." In ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/msec2012-7388.

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Melt-mixing processes such as extrusion-injection molding induce shear mechanical forces to enhance the melt blend of nanofiller-polymer and have been considered as time and cost efficient in commercial processing of polymer nanocomposites (PNCs). Extensive research has been conducted so far to investigate the overall performance of melt-processed PNCs. However there is lack of systematic studies on the nanomaterial induced phenomena that dominate the properties of the end-use melt mixing processed parts leading to engineered high quality PNCs. Furthermore, studies for exploration of the struc
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Rahman, Kazi Moshiur, Todd Letcher, and Riley Reese. "Mechanical Properties of Additively Manufactured PEEK Components Using Fused Filament Fabrication." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52209.

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Polyether ether ketone (PEEK) is introduced as a material for the additive manufacturing process called fused filament fabrication (FFF), as opposed to selective laser sintering (SLS) manufacturing. FFF manufacturing has several advantages over SLS manufacturing, including lower initial machine purchases costs, ease of use (spool of filament material vs powder material), reduced risk of material contamination and/or degradation, and safety for the users of the equipment. PEEK is an excellent candidate for FFF due to its low moisture absorption as opposed to other common FFF materials, such as
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Regalla, Srinivasa Prakash, Apoorva Kaushal, and Sarvesh Khetan. "Machine Learning (ML) Based Prediction of Defects in Extrusion-Type Additively Manufactured Parts." In International Conference on Future Technologies in Manufacturing, Automation, Design and Energy. Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-8efgqy.

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Additive manufacturing (AM) is gradually occupying a unique place as a viable industrial manufacturing technology for parts with complex geometry and difficult-to-machine materials. The capability of AM to apply to such parts in various sectors of industry, including automotive, aerospace, and medical devices, stems from the layer-by-layer building process and manufacturing directly from computer-aided design (CAD) models. All AM processes share a common set of steps and characteristics but are distinct in the type and form of raw material, energy source, and supply to the target location to b
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