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1

Young, Gregory. "Metallic nanoparticles as fuel additives in airbreathing combustion." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7710.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Dept. of Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Погребняк, Олександр Дмитрович, Александр Дмитриевич Погребняк, Oleksandr Dmytrovych Pohrebniak, Максим Вікторович Ілляшенко, Максим Викторович Ильяшенко та Maksym Viktorovych Illiashenko. "Влияние металлических добавок на структуру и свойства керамических покрытий". Thesis, Издательство СумГУ, 2004. http://essuir.sumdu.edu.ua/handle/123456789/23821.

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3

Semberg, Pär. "Interactions between iron oxides and the additives olivine, quartzite and calcite in magnetite pellets." Doctoral thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16846.

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In the present study, magnetite pellets with the additives olivine, calcite and quartzite were isothermally reduced in a tubular furnace to study the interaction between iron oxides and the additives. Exaggerated amounts of additives were used in order to enable analyses of phases that do not otherwise occur in sufficient amounts for X-ray diffraction and EDS-analyses. The reduction was set to yield either magnetite or wüstite in the temperature range 500-1300ºC. For olivine, reduction tests were also performed to allow metallization in the range 1000-1300ºC. The mineralogical phases which had
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Chipakwe, Vitalis. "Comparative Study of Chemical Additives Effects on Dry Grinding Performance." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85155.

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The application of chemical additives, known as grinding aids (GA), dates back to 1930 in the cement industry. As opposed to the cement industry, where the use of GAs is on the final processing step, it could be one of the first process steps in ore beneficiation. A few investigations addressed the GA applications in ore dressing; therefore, further studies are required to better understand the GA effects on the product properties and downstream separation processes. This thesis undertakes a comparative study on the dry grinding of magnetite and the resulting product characteristics with and w
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Zapata, Ramiro. "Study of the effect of gaseous additives on the growth of Ag films during magnetron sputtering deposition, using in situ and real-time measurements." Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS420.pdf.

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Dans le cadre de la production de vitrages « bas-émissifs » (« Low-E ») avec des propriétés d'isolation thermique renforcées, des empilements diélectriques complexes contenant des couches minces d'argent d'une épaisseur d'environ 12 nm sont déposés sur des surfaces de verre. Pour le dépôt de ces couches, la pulvérisation cathodique magnétron est une technique largement utilisée par l'industrie verrière. Les recherches actuelles visent à mieux comprendre la croissance des couches minces d'Ag pendant le dépôt et à trouver des stratégies pour contrôler cette croissance et la microstructure des co
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Mutyala, Kalyan Chakravarthi. "Influence of Metallic, Dichalcogenide, and Nanocomposite Tribological Thin Films on The Rolling Contact Performance of Spherical Rolling Elements." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1447751680.

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Abboud, Jaafar Hadi. "Laser surface alloying of titanium by metallic and non-metallic additions." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47732.

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8

Dahlgren, Christopher, and Rasmus Rolandsson. "Additiv tillverkning i metall vid batchproduktion : Kan additiva tillverkningsmetoder användas vid direkttillverkning med metall som bas?" Thesis, KTH, Industriell produktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-129418.

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Vårt arbete behandlar möjligheterna och hindren för att använda additiva tillverkningsmetoder (AM) med metall som bas för direkttillverkning vid batchproduktion. AM tillåter användaren att tillverka delar med komplicerade geometrier som är svåra, eller i vissa fall omöjliga, att tillverka för dagens konventionella tillverkningstekniker. Dessutom tillåter teknologin tillverkaren att skapa inre strukturer i ett material som exempelvis gitter- och bikakestrukturer. Metoderna för AM med metall skiljer sig bitvis ganska mycket åt, men grundprincipen är att man bygger upp en modell lager för lager u
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Hari, Vignesh. "Evaluating spreadability of metallic powders for powder bed fusion processes." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-283544.

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Additive  manufacturing  technologies  are  widely  used  in  aerospace,  space,  and  turbine industries. Parts can be manufactured directly by selectively adding materials layer-by-layer. A key aspect that is critical to the quality of the final component being manufactured is the powder characteristics. The prevailing powder characterisation techniques help in predicting the flowability of powders but do not relate to the spreading nature of the powder. To create high-quality thin layers of metal powder, it is essential to understand powder spreadability in powder bed-based additive manufac
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Coffigniez, Marion. "Additive manufacturing of 3D architectured metallic biomaterials by robocasting." Thesis, Lyon, 2021. http://www.theses.fr/2021LYSEI007.

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Au-delà de l'aspect de personnalisation qu'elle peut apporter au domaine médical, la fabrication additive donne aussi accès à l'élaboration de structures cellulaires. Ces structures, de porosité maîtrisée, permettent à la fois de moduler les propriétés mécaniques de l'objet, mais aussi de favoriser l'invasion cellulaire nécessaire en ingénierie tissulaire. Parmi les métaux communément utilisés en chirurgie orthopédique, les alliages de titane sont ceux présentant la rigidité la moins éloignée de celle de l'os. Cette étude porte donc sur l'élaboration de structures en Ti6-Al-4V, mais aussi en m
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MANCUSO, CLARA. "Dietary metallic nanoparticles: a new environmental factor in the development od Celiac Disease?" Doctoral thesis, Università degli Studi di Milano-Bicocca, 2019. http://hdl.handle.net/10281/241329.

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Sebbene l'uso di nanomateriali sta crescendo, non è ancora stato capito se rappresenti un rischio per la nostra salute. Particolarmente, l'uso di nanoparticelle nell'industria alimentare è preoccupante. Infatti, differenti gruppi di ricerca hanno dimostrato che, particolarmente le nanoparticelle metalliche, possono alterare l'omeostasi intestinale. Conseguentemente potrebbero rappresentare un fattore di rischio nell'insorgenza di patologie infiammatorie intestinali, come la Celiachia. La Celiacha è una patologia autoimmune che si sviluppa in soggetti geneticamente predisposti, dopo l'ingestion
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Karmakar, Mattias. "Additive Manufacturing Stainless Steel for Space Application." Thesis, Luleå tekniska universitet, Materialvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-72901.

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Stańczak, Magda. "Behaviour of additively manufactured metallic structures under blast loading." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0073.

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La technique de fabrication additive permet d'étudier à l'échelle du laboratoire des structures métalliques à géométrie complexe. L'application de nouvelles structures peut être particulièrement bénéfique pour améliorer la capacité d'absorption d'énergie et d'atténuation des explosions. Dans cette thèse, le rôle de la topologie des structures en aluminium AlSi10Mg fabriquées de manière additive est étudiée. Plusieurs exemplaires de structures cellulaires sont présentées. On analysera la relation entre la densité relative et les réponses de déformation des structures, ainsi que les capacités d'
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Papavassiliou, Alessandro. "Analisi bibliografica e di mercato delle polveri metalliche utilizzabili in processi additivi." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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In questo elaborato, dopo aver brevemente esposto i concetti preliminari della produzione additiva, verranno censite le polveri metalliche utilizzate nel settore. In seguito, le proprietà delle polveri metalliche più utilizzate verranno confrontate in base ai dati forniti dai principali produttori ed infine verranno approfonditi aspetti legati a proprietà chimiche, meccaniche e applicative delle stesse sulla base degli studi effettuati ad oggi sulla produzione additiva, mettendone in risalto aspetti positivi e criticità.
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Harris, Jonathan Andrew. "Additively manufactured metallic cellular materials for blast and impact mitigation." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/271771.

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Selective laser melting (SLM) is an additive manufacturing process which enables the creation of intricate components from high performance alloys. This facilitates the design and fabrication of new cellular materials for blast and impact mitigation, where the performance is heavily influenced by geometric and material sensitivities. Design of such materials requires an understanding of the relationship between the additive manufacturing process and material properties at different length scales: from the microstructure, to geometric feature rendition, to overall dynamic performance. To date,
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El, Mouhib Sabrina. "Effect of Stainless Steel Additive Manufacturing On Heat Conductivity and Urea Deposition." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287314.

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Hydroforming is the manufacturing process that Scania uses to produce exhaust pipes with complex shape and high durability.  Selective Laser Melting is the process used by designers to print prototype pipes and perform emissions tests before mass production. Results from previous tests at Scania showed superior performance of 3D printed pipes compared to hydroformed components during emissions test as the 3D printed pipes were able to transfer heat faster than hydroformed pipes.  To understand the reason behind this mismatch, the effect of selective laser melting parameters on energy density,
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Smith, Christopher. "Application of layout optimisation to the design of additively manufactured metallic components." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/13364/.

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Additive manufacturing (`3D printing') techniques provide engineers with unprecedented design freedoms, opening up the possibility for stronger and lighter component designs. Such designs can be developed using structural topology optimisation, a method that computationally designs minimum mass components. Whilst many methodologies now exist this thesis focuses solely on a method known as layout optimisation where components are designed to meet a static strength target using a minimal amount of material. Although layout optimisation offers several advantages over the more predominant topology
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Regestam, Karl-Johan. "Additiv tillverkning av kylblock i metall." Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-201212.

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I dag växer marknaden för additiv tillverkning. Tillverkningsprocessen används för att skapa komplexa prototyper och färdiga komponenter. De främsta områdena idag är inom medicinska implantat och flygindustrin men marknaden växer ständigt och tekniken tar mark i andra områden. Ett område som har stor potential är kylsystem. Att kombinera kylsystem med additiv tillverkningsteknik ger möjligheter att förbättra rörströmningen och värmeutbytet vilket minskar kylkomponenternas volym.I den här rapporten redovisas hela utvecklingen av ett valt kylarkoncept som revideras med relevanta beräkningar och
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Bousquet, Anna. "Additiv tillverkning i metall och topologioptimering." Thesis, Mälardalens högskola, Innovation och produktrealisering, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36310.

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This thesis project was conducted as a case study at Scania CV, a manufacturer of trucks, buses and industrial and marine engines. The project aimed to investigate how topology optimization can be used to design end products for metal additive manufacturing (AM). The main research questions for the project was: How can topology optimization be used to design parts for metal additive manufacturing? Which gave rise to further research questions: Which parts are suitable for metal additive manufacturing? Which factors has to be considered when designing end products for metal additive manufacturi
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Zavala, Arredondo Miguel Angel. "Diode area melting : use of high power diode lasers in additive manufacturing of metallic components." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/18953/.

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Additive manufacturing processes have been developed to a stage where they can now be used to manufacture net-shape high-value components. Selective Laser Melting (SLM) comprises of either a single or multiple deflected high energy fibre laser source(s) (e.g. 200 – 400 W each) to raster scan, melt and fuse layers of metallic powdered feedstock. The beam(s) is(are) deflected by a Scanning Galvo Mirror System and an F-theta lens is used to provide a flat field at the image plane of the scanning system. However, this deflected laser raster scanning methodology is high cost (addition of multiple h
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Corona, Galvan Luis. "Prototypage rapide de pièces en acier : étude du dépôt de matière et d'énergie lors de la fusion à l'arc d'un fil par le procédé MIG-CMT." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS062/document.

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Un banc d’essai spécialement dédié à la fabrication additive par une nouvelle technologie basée sur la fusion à l’arc électrique d’un fil métallique a été développé. Le procédé utilise une source de soudage à l’arc appelée Cold Metal Transfer (CMT) pour assurer la fusion contrôlée d’un fil métallique et le dépôt de gouttelettes de métal liquide, afin de produire par la superposition de cordons des pièces mécaniques. La technologie développée a été employée pour fabriquer des éprouvettes à partir d’un fil en acier faiblement alliés. L’influence des nombreux paramètres contrôlant la source de so
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Gullapalli, Vikranth. "Study of Metal Whiskers Growth and Mitigation Technique Using Additive Manufacturing." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804972/.

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For years, the alloy of choice for electroplating electronic components has been tin-lead (Sn-Pb) alloy. However, the legislation established in Europe on July 1, 2006, required significant lead (Pb) content reductions from electronic hardware due to its toxic nature. A popular alternative for coating electronic components is pure tin (Sn). However, pure tin has the tendency to spontaneously grow electrically conductive Sn whisker during storage. Sn whisker is usually a pure single crystal tin with filament or hair-like structures grown directly from the electroplated surfaces. Sn whisker is h
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Jönsson, David, and Mir Kevci. "Geometrical accuracy of metallic objects produced with Additive or Subtractive Manufacturing: a comparative in-vitro study." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19934.

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Syftet: Utvärdera produktionstolerans av objekt som producerats genom additiv framställningsteknik (AF) för användning inom tandvård, samt att jämföra denna teknik med subtraktiv framställningsteknik (SF) genom reverse engineering.Material och metod: Tio exemplar av två olika geometriska objekt framställdes från fem olika AF maskiner och en SF maskin. Objekt A efterliknar ett inlay, medan objekt B återspeglar en modell av en fyrledsbro. Alla objekt delades in i olika mätled; X, Y och Z. Mätningarna utfördes med validerade och kalibrerade instrument. Linjära avstånd mättes med ett digitalt skju
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Pastuschka, Lisa, and Peter Appel. "Additive Fertigung von Metallen – Einsatz des LaserCUSING®s im Bereich Automotive." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-215075.

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Die Additive Fertigung spielt heutzutage auch in der Automobilindustrie eine bedeutende Rolle. Eine Ausprägungsform, das pulverbett-basierte LaserCUSING®-Verfahren, bietet viele neue Möglichkeiten. Im Folgenden wird zunächst ein kurzer Überblick über das Verfahren gegeben und anschließend der Einsatz des LaserCUSING®s im Bereich Automotive anhand eines gemeinsamen Projekts der EDAG Engineering GmbH, des Laser Zentrums Nord, der BLM Group und der Concept Laser GmbH verdeutlicht. Hier wurde auf Basis des EDAG Light Cocoon ein topologisch optimierter und hybrid gefertigter Spaceframe entwickelt.
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Sarentica, Atilla. "Conventional heat treatment of additively manufactured AlSi10Mg." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75056.

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Balzi, Davide. "Esecuzione di micrografie su provini in acciaio inossidabile PH1 realizzati per additive manufacturing." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Sjökvist, Thobias. "Influence of Ferrochromium and Ferromanganese Additions on Inclusion Characteristics of Steel." Doctoral thesis, KTH, Materials Science and Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3150.

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Hernandez, Ludwing A. "Integration of Ultrasonic Consolidation and Direct-Write to Fabricate an Embedded Electrical System Within a Metallic Enclosure." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/780.

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A research project was undertaken to integrate Ultrasonic Consolitation (UC) and Direct-Write (DW) technologies into a single apparatus to fabricate embedded electrical systems within an ultrasonically consolidated metallic enclosure. Process and design guidelines were developed after performing fundamental research on the operational capabilities of the implemented system. In order to develop such guidelines, numerous tests were performed on both UC and DW. The results from those tests, as well as the design and process guidelines for the fabrication of an embedded touch switch, can be used a
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Samarjy, Ramiz Saeed Matti. "Interaction mechanisms for a laser-induced metallic boiling front." Doctoral thesis, Luleå tekniska universitet, Produkt- och produktionsutveckling, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65281.

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This thesis is about fundamental interaction mechanisms of laser remote fusion cutting, RFC, which is based on the formation of a quasi-stationary laser-induced boiling front that causes drop ejection, preferably downwards. Laser cutting of metals, invented in 1967, has developed from a niche to a well established high quality cutting technique in the manufacturing industry. Usually a gas jet is employed concentric to the laser beam, to eject the molten metal. One technique option, interesting though hardly applied yet because of usually low quality and speed, is remote laser cutting. Two tech
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Sjöström, Julia. "Linkage of Macro- and Micro-scale Modelling Tools for Additive Manufacturing." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-283603.

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Additive manufacturing methods for steel are competing against commercial production in an increasing pace. The geometry freedom together with the high strength and toughness due to extreme cooling rates make this method viable to use for high-performance components. The desirable material properties originate from the ultrafine grain structures. The production is often followed by a post hardening heat treatment to induce precipitation of other phases. The printing process does however bring several challenges such as cracking, pore formation, inclusions, residual stresses and distortions. It
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Myers, Kyle M. "Structure-Property Relationship of Binder Jetted Fused Silica Preforms to Manufacture Ceramic-Metallic Interpenetrating Phase Composites." Youngstown State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1464089607.

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Zhong, Yuan. "Sub-grain structure in additive manufactured stainless steel 316L." Doctoral thesis, Stockholms universitet, Institutionen för material- och miljökemi (MMK), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-144519.

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The thesis focuses on exploring the sub-grain structure in stainless steel 316L prepared by additive manufacturing (AM). Two powder-bed based AM methods are involved: selective laser melting (SLM) and electron beam melting (EBM). It is already known that AM 316L has heterogeneous property and hierarchy structure: micro-sized melt pools, micro-sized grains, nano-sized sub-grain structure and nano-sized inclusions. Yet, the relation among these structures and their influence on mechanical properties have not been clearly revealed so far. Melt pool boundaries having lower amount of sub-grain segr
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Beiker, Kair Alexandros, and Konstantinos Sofos. "Additive Manufacturing and Production of Metallic Parts in Automotive Industry : A Case Study on Technical, Economic and Environmental Sustainability Aspects." Thesis, KTH, Industriell produktion, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149669.

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Additive Manufacturing (AM) comprises a family of different technologies that build up parts by adding materials layer by layer at a time based on a digital 3D solid model. After thirty years of development, AM has become a mainstream manufacturing process with more materials and new technologies involved in this process. Undoubtedly, the most dramatic and challenging development of group of technologies has been the printing of metals. Nowadays, the use of AM for the production of parts for final products continues to grow. Organizations around the world are successfully applying the technolo
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Hopkins, Christopher David. "Development and Characterization of Optimum Process Parameters for Metallic Composites made by Ultrasonic Consolidation." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275414900.

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Günther, Johannes, and Thomas Niendorf. "Neue Werkstoffe über additive Fertigung." Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2016. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-211175.

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Über die additive Fertigung, oftmals bezeichnet als 3D-Druck, lassen sich Bauteile nahezu beliebiger geometrischer Komplexität herstellen. Gleichzeitig lassen die Prozessrandbedingungen die direkte Einstellung der Mikrostruktur in den verwendeten metallischen Werkstoffen zu. Hieraus ergeben sich weitreichende Möglichkeiten bezüglich der Eigenschaftsoptimierung aktueller Hochleistungswerkstoffe.
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Cuzacq, Laurent. "Élaboration et caractérisation de matériaux métalliques poreux par fabrication additive par dépôt de matière (Extrusion Additive Manufacturing) et par métallurgie des poudres." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0144.

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L'aluminium (Al) est le métal non-ferreux le plus utilisé au monde. Ses propriétés physiques particulières en font un matériau de choix pour un grand nombre de domaines industriels comme les transports, la construction, l'alimentaire ou encore l'électronique. Sa faible densité est idéale pour réduire le poids des structures. Les matériaux poreux à base d'Al, présentent, de surcroit, l’avantage de présenter une très grande surface d'échange avec le milieu. Comme tous les métaux, l'Al est très facilement usinable. Toutefois, certaines formes, plus complexes, ne sont pas réalisables en utilisant
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Caputo, Matthew P. "4-Dimensional Printing and Characterization of Net-Shaped Porous Parts Made from Magnetic Ni-Mn-Ga Shape Memory Alloy Powders." Youngstown State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1525436335401265.

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Vickerfält, Amanda. "Investigation of the possibility for using ZrO2 and ZrSiO4 for Zr additions to liquid ferrosilicon." Thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214009.

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Ferrosilicon containing 50-75% Si and 1.0-5.0% Zr is used as inoculant in the cast iron industry. Zr can be added to liquid ferrosilicon by use of Zr metal or zirconium ferroalloy (FeSiZr). Then the recovery of Zr, i.e. the fraction of Zr transferred from the additive to the ferrosilicon, as well as the hit rate on specification is high. The aim of this study was to investigate the recovery of Zr from zircon sand, ZrSiO4, and zirconia, ZrO2, in comparison to zirconium ferroalloy when added to liquid ferrosilicon with 75% Si at 1600⁰C.  Also the refining effect of the different additives on Al
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Günther, Johannes, and Thomas Niendorf. "Neue Werkstoffe über additive Fertigung." TU Bergakademie Freiberg, 2015. https://tubaf.qucosa.de/id/qucosa%3A23085.

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Über die additive Fertigung, oftmals bezeichnet als 3D-Druck, lassen sich Bauteile nahezu beliebiger geometrischer Komplexität herstellen. Gleichzeitig lassen die Prozessrandbedingungen die direkte Einstellung der Mikrostruktur in den verwendeten metallischen Werkstoffen zu. Hieraus ergeben sich weitreichende Möglichkeiten bezüglich der Eigenschaftsoptimierung aktueller Hochleistungswerkstoffe.
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Strand, Emil, and Alexander Wärnheim. "A study of micro- and surface structures of additive manufactured selective laser melted nickel based superalloys." Thesis, KTH, Materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188154.

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This study examined the micro- and surface structures of objects manufactured by selective laser melting (SLM). The results show that the surface roughness in additively manufactured objects is strongly dependent on the geometry of the built part whereas the microstructure is largely unaffected. As additive manufacturing techniques improve, the application range increases and new parameters become the limiting factor in high performance applications. Among the most demanding applications are turbine components in the aerospace and energy industries. These components are subjected to high mecha
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Carlsson, Rebecca. "Comparison of turning blades produced by a conventional- and additive manufacturing method." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-69032.

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Additive manufacturing has developed radical through the years. Sandvik has invested in the area by building a center specific for additive manufacturing. Due to problems with the material- and product properties and high production costs no products have been used with additive manufacturing method. These aspects have improved over the years and therefore the master thesis was made with an objective: to compare two different produced blades with focus on the aspects of material- and product properties and production costs. One of the blades was produced through additive manufacturing (AM) and
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Boissier, Mathilde. "Coupling structural optimization and trajectory optimization methods in additive manufacturing." Thesis, Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAX084.

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Cette thèse porte sur l’optimisation des trajectoires de lasage pour la fabrication additive sur lit de poudre, ainsi que leur lien avec la géométrie de la pièce à construire. L’état de l’art est principalement constitué par des trajectoires basées sur des motifs, dont l’impact sur les propriétés mécaniques des objets finaux est quantifié. Cependant, peu d’analyses permettent de relier leur pertinence à la forme de la pièce elle-même. Nous proposons dans ce travail une approche systématique visant à optimiser la trajectoire sans restriction a priori. Le problème d’optimisation consiste à fusio
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Juhlin, Stina. "Evaulation of liquid-exfoliatedgraphene as additive in Ag-basedsliding contacts." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353942.

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This master thesis work is performed at ABB Corporate Research Center inVästerås. The aim of this study is to investigate Ag:graphene composites as slidingelectrical contacts, suitable for use in e.g. tap-changers. Three different graphenematerials, all produced by a low-cost exfoliation process, are evaluated in this study. The results are compred to an ongoing work on Ag:GO (graphene oxide) composites. This material has shown very good tribological properties, however it hasbeen difficult to handle during sintering processing. The goal of this study is to geteven better tribological, electri
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Ståhl, Dennis, and Siyu Guo. "Innovation genom additiv tillverkning." Thesis, KTH, Maskinkonstruktion (Inst.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230585.

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Additiv tillverkning, AM, är en teknik som utvecklas med stormsteg. Konventionella tillverkningsmetoder, som exempelvis svarvning eller formgjutning, är begränsade när det kommer till att ta fram produkter med komplexa geometrier och därför är AM ett bra komplement. Tidigare har dock andra materialegenskaper såsom brott- och sträckgräns varit något som kompenserats med inom AM. Men i den takt som AM utvecklas kan tekniken snart ersätta de flesta konventionella tillverkningsmetoderna helt. Syftet med denna rapport är att redogöra vad som är möjligt att producera med dagens AM och vad som kan fö
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Masmoudi, Amal. "Modélisation et développement expérimental du procédé de fabrication additive par fusion laser sélective d'un lit de poudre métallique : influence de la pression de l'atmosphère." Thesis, Belfort-Montbéliard, 2016. http://www.theses.fr/2016BELF0287/document.

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Le procédé de fusion sélective par laser (SLM) d’un lit de poudre métallique, est un procédé de fabrication additive qui permet de fabriquer des pièces de forme complexe directement à partir d’un fichier CAO en passant par la fusion totale de couches de poudre déposées successivement. Au cours du procédé SLM l’apport d’énergie du laser à la cible engendre de nombreux cycles thermiques: fusion – vaporisation – solidification. Dans ce contexte, cette thèse a pour double objectif :1) une meilleure caractérisation et compréhension des phénomènes qui se produisent lors de l’interaction du faisceau
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Xu, Jinghao. "Alloy Design and Characterization of γ′ Strengthened Nickel-based Superalloys for Additive Manufacturing". Licentiate thesis, Linköpings universitet, Konstruktionsmaterial, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-173042.

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Nickel-based superalloys, an alloy system bases on nickel as the matrix element with the addition of up to 10 more alloying elements including chromium, aluminum, cobalt, tungsten, molybdenum, titanium, and so on. Through the development and improvement of nickel-based superalloys in the past century, they are well proved to show excellent performance at the elevated service temperature. Owing to the combination of extraordinary high-temperature mechanical properties, such as monotonic and cyclic deformation resistance, fatigue crack propagation resistance; and high-temperature chemical proper
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Gomez, Ortega Arturo. "Prototypage rapide de pièces en alliage d’aluminium : étude du dépôt de matière et d’énergie lors de la fusion à l’arc d’un fil par le procédé MIG-CMT." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS067/document.

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Un nouveau procédé de fabrication additive de pièces métalliques, basé sur le procédé de soudage à l’arc appelé CMT (Cold Metal Transfert), est étudié dans l’objectif de réaliser des pièces en alliage d’aluminium Al-5Si. Un banc de fabrication additive basé sur le principe des imprimantes 3D open source, sur lequel a été intégré le procédé CMT, a été spécialement développé. Le procédé CMT permet de contrôler la fusion d’un fil d’aluminium et son dépôt sous la forme de gouttelettes sur la surface de construction, formant après solidification des « cordons » qui peuvent être superposés pour fabr
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Ratsimba, Alice. "Élaboration d’objets en cuivre par fabrication additive par extrusion de matière : Etude de la faisabilité : cas de pâtes chargées utilisant des hydrogels de polysaccarides comme systèmes liants." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0054.

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Parmi les sept méthodes de fabrication additive appliquées aux métaux, l'extrusion de matière (Extrusion Additive Manufacturing, EAM) apparait comme une technique prometteuse pour la production de d’objets en cuivre. Ce procédé de mise en forme indirect consiste à convoyer un matériau et à le pousser à travers un orifice afin de former des cordons de matière. Ce processus de mise en forme indirecte implique le convoyage d'un matériau à travers un orifice pour former des cordons de matière. Les objets tridimensionnels sont construits par empilement de couches successives à partir d'un mélange d
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Piazza, Noemi. "Studio dei processi di fabbricazione additiva per leghe metalliche e approfondimento sulle applicazioni in ambito biomedicale." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Il presente lavoro di tesi è nato con l'obbiettivo di presentare le caratteristiche della lega di titanio Ti-6Al-4V nelle varie tipologie di produzione additiva, in particolar modo delle tecniche Selective Laser Melting e Electron Beam Melting per la produzione di protesi personalizzate. Diversi materiali possono essere processati mediante tale tecnologia, tra questi il titanio e le sue leghe, che trovano grande impiego in molteplici settori, fra cui quello biomedico. Il loro utilizzo è incrementato da quando i processi di Additive Manufacturing ne hanno permesso una produzione più economica
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Svensson, Marcus. "Selection of a product component for topology optimization and additive manufacturing." Thesis, Jönköping University, JTH, Industriell produktutveckling, produktion och design, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-52791.

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This is a master thesis research on how to select the right components in a product, considering reducing the weight with topology optimization (TO) and adaption for additive manufacturing (AM). It is well established that manufacturing of complex structures can be achieved with AM, the possibility of integrating assembled components and improve features will therefore be investigated. The new component structure must still withstand the loads that it is subjected to during usage, to not permanently deform or break. In this research the studied product was a handheld Husqvarna chainsaw. Initia
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