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Dissertations / Theses on the topic 'Swaging'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Görtan, Mehmet Okan [Verfasser], Peter [Akademischer Betreuer] Groche, and Clemens [Akademischer Betreuer] Müller. "Severe plastic deformation of metallic materials by equal channel angular swaging: Theory, experiment and numerical simulation / Mehmet Okan Görtan. Betreuer: Peter Groche ; Clemens Müller." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2014. http://d-nb.info/1110902077/34.

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2

Lourenço, Julio Cesar. "Efeito do processo de solidificação, deformação plástica e recristalização sobre o comportamento eletroquímico da liga Al-4,5% p.Cu em soluções aquosas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/97/97134/tde-29032017-092513/.

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A liga binária Al-Cu é a base para todas as ligas da série 2xxx que são de grande importância em diversas aplicações como na indústria aeronáutica, transporte, máquinas e equipamentos. No entanto, pouco se conhece sobre os efeitos do tipo de solidificação desta liga e da deformação plástica sobre sua resistência à corrosão em meio aquoso. O escopo deste trabalho foi procurar correlacionar microestruturas da liga Al-4,5%p.Cu solidificada de maneira convencional e unidirecional vertical ascendente (brutas de fusão, deformadas plasticamente por forjamento rotativo a frio, e tratadas termicamente

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3

Tan, Serdar. "Optimization Of Macrostructure In Aluminium Foams." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/2/1011196/index.pdf.

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Pure aluminium and aluminium-5wt % TiO2 aluminium foams were produced by powder metallurgy technique with the use of TiH2 as foaming agent. Two sizes of TiH2 were used: 20&micro<br>m and 3&micro<br>m. It has been confirmed that high level of compaction is the primary requirement in foaming. It was shown that hot swaging could be used as a method of compaction for foaming as it leads to values close to full density. Pure aluminium foamed at 675&deg<br>C and 725&deg<br>C leads to a volume expansion between 90-180 %. A model was developed for pure aluminium to explain the pore initiation and

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4

Marr, Tom. "Hochumgeformte Leichtmetallverbundwerkstoffe und deren festigkeitsbestimmende Faktoren." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-133446.

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Da in der Natur die Festigkeit der Stoffe bzw. Werkstoffe mit deren Massendichte korreliert [1], bieten sich dem Werkstoffingenieur zwei Möglichkeiten das genannte Ziel zu erreichen: Entweder er reduziert die effektive Dichte bereits sehr fester Werkstoffe durch konstruktive bzw. geometrische Optimierungen, oder es gelingt sehr leichte Werkstoffe mit deutlich gesteigerter Festigkeit herzustellen. Die erstgenannte Verfahrensweise stellt zu großen Teilen ein konstruktives bzw. fertigungstechnisches Problem dar. Von werkstoffwissenschaftlichem Interesse ist deshalb nur die zweite Möglichkeit. Dab

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5

Belloy, Philippe. "Intégration de connaissances métier dans la conception : un modèle pour les pièces mécaniques : application à l'usinage et à l'estampage." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10219.

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Cette thèse est relative au domaine de la conception en génie mécanique et plus particulièrement à l'intégration des connaissances de fabrication dans un système de conception. Ce type d'intégration nécessite la mise en place de modèles de pièce bien différents des modèles CAO traditionnels. Le modèle de description de pièces que nous proposons est base sur deux types d'entités : les peaux, représentatives des surfaces fonctionnelles composant les pièces et les squelettes représentant les flux de matière entre les surfaces fonctionnelles. A partir de la description minimale des pièces mécaniqu

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6

Eschke, Andy. "Bestimmung lokaler Textur- und Spannungsverteilungen an submikro-/nanokristallinen mehrphasigen Gradientenmaterialien mittels zweidimensionaler Röntgenmikrobeugung sowie anhand analytischer und numerischer Modellierungsansätze." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-163807.

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Fortschrittliche ingenieurtechnische Anwendungen stellen hohe Ansprüche an neuartige Materialien sowohl hinsichtlich e.g. mechanischer Eigenschaften wie Festigkeit und Duktilität als auch hinsichtlich einer möglichst vielfältigen Einsetzbarkeit (Maßschneiderung etc.). Zudem sind Ressourcenschonung und nachhaltige Produktion bei gleichzeitig hoher Performance zu realisieren. Entsprechend existiert grundlagenseitig Forschungsbedarf zu innovativen Materialien (e.g. Kompositwerkstoffe) und ihren Prozessierungen. In der vorliegenden Dissertation werden submikro-/nanokristalline mehrphasige Gradie

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7

Chen, Ying-Yu, and 陳映諭. "Micro Rotary Swaging of Metal Tubes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/m7j65c.

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碩士<br>國立虎尾科技大學<br>創意工程與精密科技研究所<br>99<br>Currently most used metal capillary drawing process approach to the process of forming, when reduced to near micron size, the remaining material through the cavity of the wall dozens of grains is around this time to drawing process the process, the relationship between the size effect due to surface friction led to the relative increase in tensile stress will increase, easily lead to necking rupture. Therefore, through micro rotary swaging process instead of drawing process forming range can’t be overcome, by micro rotary swaging of forming characteristi

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8

Huang, Guo-Jun, and 黃國鈞. "FE Analysis of Rotary Swaging of Rods." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/54k46h.

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碩士<br>國立虎尾科技大學<br>創意工程與精密科技研究所<br>97<br>In sinking rods with rotary swaging, spiral defect would occur because the workpiece is subjected to tangential force caused by the swaging dies driven by spindle motor. This work investigates the effect with the aid of FEM software DEFORM 3D. The influence of reduction of area, die inclination angle, friction factor, and workpiece diameter on the formation of spiral defect, distribution of effective strain, and redundant deformation factor was analyzed. The results showed that spiral became significant with increasing reduction, decreasing die angle or

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9

Lin, Jun-Zhi, and 林均治. "FE Analysis of Micro Rotary Plunge-Swaging." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/h3waxh.

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碩士<br>國立虎尾科技大學<br>創意工程與精密科技研究所<br>98<br>The fillet of the convex die makes first contact with workpiece in the plunge-swaging process. The swaging dies are driven by a spindle and are liable to cause tangential deformation and twist on the workpiece. The workpiece would appear polygon-shape with a large fillet whereas forming defect would occur with a sharp fillet. Up to now broad reports can be found regarding the feed-in swaging process, while scarce resources are reported for the plunge-swaging process. This work aims to analyze the plunge-swaging process of wire via finite element software

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10

Hsu, Meng-Hsuan, and 許孟軒. "The Study of Swaging Process Optimization of Automobile Steering Shaft." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/5g97dj.

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碩士<br>國立臺北科技大學<br>機電整合研究所<br>101<br>After the swaging process, steering shaft of auto mobile cannot be easily fabricated with the match pieces, and the life of the spline shaft is too short. In the study, we use Taguchi methods through improving steering shaft fabricating and extending the life of the spline shaft in two stages. First, it applied L9 orthogonal array. Second, it applied L18 orthogonal array systematically to change the process parameters, for example, the swaging modes, the Feeding speed, the diameter size, the mold type, the retention period, the spindle speed, and the prevent

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11

Chen, Yu-Chiang, and 陳榆強. "An Investigation of the Feasibility of Sinking with Rotary Swaging." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/4yeg2w.

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碩士<br>國立虎尾科技大學<br>機械與機電工程研究所<br>97<br>Stamping process is usually applied in sinking the open end of high pressure vessels. The amount of sinking has to be divided to several stamping operations to avoid buckling on the vessel body. Therefore, the adjustment of the stamping dies becomes complex, die parts are increased, and die cost becomes expensive. Moreover, process annealing is required to avoid fracture on the workpiece from excessive strain hardening in the transfer-stamping. Rotary swaging is a genre of incremental deformation. Strain hardening is minimal and its die design methodology

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12

Lin, Yu-Fen, and 林郁芬. "Effects of Neodymium and Rotary Swaging on Corrosion Behaviors of AZ71 Magnesium Alloys." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/ccz5m4.

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碩士<br>國立臺北科技大學<br>材料及資源工程系研究所<br>102<br>Due to the advantages of high specific strength and reasonable thermal conductivity, magnesium alloys are extensively utilized in 3C product applications. However, the deficient corrosion resistance of magnesium alloys limit their use. In this study, 0.5, 1.0 and 1.5 wt.% of Nd were doped into AZ71 magnesium alloys. The corrosion resistance of these alloys in as-cast, homogenized, rotary swaged, and 250°C and 350°C annealed conditions were studied. According to electrochemical impedance tests, 1.0 wt.% Nd added AZ71 alloy demonstrated the highest total c

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13

Kao, Chen-Yang, and 高振洋. "Effects of Rotary Swaging and Annealing on Mechanical Properties of AZ Series Magnesium Alloys." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32m2dg.

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碩士<br>國立臺北科技大學<br>材料及資源工程系研究所<br>99<br>AZ series magnesium alloys are rotary swaged and annealed at 100-400°C temperatures. The annealed microstructures and mechanical properties are observed. Mechanical properties of these alloys at 100-300°C temperatures are measured as well. The magnesium alloys form a great number of crossing deformation bands by rotary swaging. Due to formation of high dislocation density in the bands, recrystallization occurs easily with annealing treatments. The grain size greatly reduces from 150μm to 15μm, while the hardness of annealed sample returns to that of solut

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14

CAO, ZHI-HAO, and 曹智皓. "Analysis of Rotary Swaging Process for Preforming Process of High Expansion Ratio Bike Tube." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/u858kq.

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碩士<br>國立虎尾科技大學<br>機械與電腦輔助工程系碩士班<br>107<br>With the development of bicycles in recent years, people now are not only satisfied with how convenient and power-saving bicycles are, but also the fancy appearances of bikes. To achieve dramatic deforming of bike frames which are thought more beautiful than simple ones, the extreme high-profile difference which traditional processing method cannot cope with is required. Thus, we use rotary swaging forging which is the best forging method of shrink forming processes as pre-forming in this paper. Then, we use the basic formula evolved by industry experi

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15

Hsuan-PoChen and 陳炫博. "Effects of Rotary Swaging on Microstructure and Tensile Mechanical Properties of 2024 Aluminum Extruded Tube." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/m2e2yu.

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16

Hu, Shu-Ming, and 胡書銘. "A Study of Rotary Swaging for the Tubes with Non-Uniform Wall Thickness in Inner Diameters." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/q8u9jz.

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碩士<br>國立虎尾科技大學<br>創意工程與精密科技研究所<br>98<br>Special-shaped tubes, which feature extensive uses and a variety of shapes, can be achieved with rotary swaging process (RSP). Current studies of rotary swaging process focused largely on the forming of outer diameter, rarely on inner diameter, therefore, this study explored the RSP of the tubes with non-uniform wall thickness in inner diameters, aiming to learn further about the characteristics of and the trends in the RSP of inner diameter. First, AL-6063 was adopted for material properties analysis. Then, compression tests with different compression

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17

Görtan, Mehmet Okan. "Severe plastic deformation of metallic materials by equal channel angular swaging: Theory, experiment and numerical simulation." Phd thesis, 2014. https://tuprints.ulb.tu-darmstadt.de/4077/1/Dissertation_MehmetOkanG%C3%B6rtan.pdf.

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Ultrafine-grained metals produced by severe plastic deformation processes are distinguished with many outstanding mechanical properties such as a combination of high strength and ductility or improved fatigue behavior and thus can be used to meet the high strength requirements of the metal forming industry. Although several severe plastic deformation processes have been developed over the last three decades, the industrial utilization of such materials is still in an early stage. Production of bulk UFG materials is still expensive. Therefore, the few applications are limited to the sports good

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18

Hofrichterová, Tereza. "Únavové vlastnosti hořčíkové slitiny AZ31 připravené metodou rotačního kování." Master's thesis, 2021. http://www.nusl.cz/ntk/nusl-448226.

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Magnesium alloys are considered to have a high potential for applications in many engineering fields. Specifically, AZ alloys are of low weight, good castability and strength and they are also fairly resistant to corrosion. Moreover, the mechanical properties can be further improved by metalworking tech- niques. Methods of severe plastic deformation are often used for this purpose. Rotary swagging, which is one of those methods, is used for tubes and rods crafting. This method allows the material structure to reach homogeneous microstructure in its full volume. There has already been a fine am

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19

Škraban, Tomáš. "Mechanické a fyzikální vlastnosti hořčíkových slitin připravených metodou rotačního kování." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-434492.

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in english For their positive influence on mechanical and physical properties of the material, methods of severe plastic deformation are popular for quite some time today. Rotary swaging is one of them. With its simplicity and productivity, it has the potential for industrial use. It is a radial swaging of rods or tubes, which results in decreasing of their diameter. Influence of this method is researched on extruded rods made of magnesium alloy AZ31. Experiments are made on five samples of different degree of swaging (different diameter). This allows to research gradual evolution of propertie

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20

Marr, Tom. "Hochumgeformte Leichtmetallverbundwerkstoffe und deren festigkeitsbestimmende Faktoren." Doctoral thesis, 2013. https://tud.qucosa.de/id/qucosa%3A27511.

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Da in der Natur die Festigkeit der Stoffe bzw. Werkstoffe mit deren Massendichte korreliert [1], bieten sich dem Werkstoffingenieur zwei Möglichkeiten das genannte Ziel zu erreichen: Entweder er reduziert die effektive Dichte bereits sehr fester Werkstoffe durch konstruktive bzw. geometrische Optimierungen, oder es gelingt sehr leichte Werkstoffe mit deutlich gesteigerter Festigkeit herzustellen. Die erstgenannte Verfahrensweise stellt zu großen Teilen ein konstruktives bzw. fertigungstechnisches Problem dar. Von werkstoffwissenschaftlichem Interesse ist deshalb nur die zweite Möglichkeit. Dab

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21

Eschke, Andy. "Bestimmung lokaler Textur- und Spannungsverteilungen an submikro-/nanokristallinen mehrphasigen Gradientenmaterialien mittels zweidimensionaler Röntgenmikrobeugung sowie anhand analytischer und numerischer Modellierungsansätze." Doctoral thesis, 2014. https://tud.qucosa.de/id/qucosa%3A28623.

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Fortschrittliche ingenieurtechnische Anwendungen stellen hohe Ansprüche an neuartige Materialien sowohl hinsichtlich e.g. mechanischer Eigenschaften wie Festigkeit und Duktilität als auch hinsichtlich einer möglichst vielfältigen Einsetzbarkeit (Maßschneiderung etc.). Zudem sind Ressourcenschonung und nachhaltige Produktion bei gleichzeitig hoher Performance zu realisieren. Entsprechend existiert grundlagenseitig Forschungsbedarf zu innovativen Materialien (e.g. Kompositwerkstoffe) und ihren Prozessierungen. In der vorliegenden Dissertation werden submikro-/nanokristalline mehrphasige Gradie

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