Academic literature on the topic 'Extrusion'

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Journal articles on the topic "Extrusion"

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Ren, Zhong. "Comparison Study on the Effect of Traction Speed on the GAE and Traditional Extrusion Forming of Four-Lumen Plastic Micro-Catheter." Key Engineering Materials 881 (April 2021): 39–44. http://dx.doi.org/10.4028/www.scientific.net/kem.881.39.

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In this paper, the effect of traction speed on the four-lumen plastic micro-catheter (FLPMC) was numerically studied. Moreover, the numerical simulations of FLPMC based on two kinds of extrusions, i.e., traditional extrusion and gas-assisted extrusion were performed and compared. Numerical results show that with the increase of traction speed, the sizes of FLPMC for both extrusions all decrease. The sizes of FLPMC based on gas-assisted extrusion are sightly larger than those of the traditional extrusion. To ascertain the reasons, the flow velocities, pressure, shear stress and first normal str
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Lu, W. L., Y. Wang, and Jin Tao Hai. "The Effects of Extrusion Ratio and Friction on Material Microstructures during Sandglass Extrusion Process." Materials Science Forum 551-552 (July 2007): 383–86. http://dx.doi.org/10.4028/www.scientific.net/msf.551-552.383.

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Sandglass extrusion is an ultrafine grain size method. Due to the repetitive and multiple extrusions, large strain can be accumulated and ultrafine grain size can be obtained. Some factors can affect the experimental results of sandglass extrusion, such as extrusion ratio, number of extrusion, extrusion temperature, friction and free space in mould cavity etc. These factors have different effects on material microstructures, properties and defects. In this paper, the effects of extrusion ratio and friction on material microstructures during sandglass extrusion process have been discussed and t
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Yang, Jun Ying, Bao Yun Song, Hai Shi Ning, and Rong Fu. "Microstructure of AZ31 Magnesium Alloy Produced by the CONFORM Process under Different Extrusion Wheel Velocities." Advanced Materials Research 189-193 (February 2011): 2609–12. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.2609.

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It is widely known that the continuous extrusion forming (CONFORM) process can produce ultra-long seamless products of various cross-sections for aluminum, copper and their alloys. In this paper, the continuous extrusion of AZ31 magnesium alloy is achieved. The effect of extrusion wheel velocity on microstructure of extrusions is investigated. The results indicate that grain refinement is realized during CONFORM process. As the extrusion wheel velocity increases, the grain size at the center of a cross section perpendicular to the extrusion direction of an extrusion increases, and the grain st
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Lu, W. L., Y. Wang, and Jin Tao Hai. "The Effects of Free Space in Mould Cavity on Sandglass Extrusion." Materials Science Forum 475-479 (January 2005): 2999–3002. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.2999.

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Sandglass extrusion is an ultrafine grain size method. Due to the repetitive and multiple extrusions, large strain will be accumulated and ultafine grain size can be obtained. There are some factors that can affect the experimental result of sandglass extrusion. Among these factors, free space in mould cavity is very important, which can affect the forming of the fold during the extrusion. In this paper, the effects of free space in mould cavity on sandglass extrusion have been discussed and theory analysis and experimental results have been reported.
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Kim, Tae Bum, Masakazu Tane, Shinsuke Suzuki, Takuya Ide, Hiroshi Utsunomiya, and Hideo Nakajima. "Improvement of Strength of Lotus-Type Porous Aluminum through ECAE Process." Materials Science Forum 695 (July 2011): 263–66. http://dx.doi.org/10.4028/www.scientific.net/msf.695.263.

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Lotus-type porous aluminum with cylindrical pores oriented in one direction was deformed by Equal Channel Angular Extrusion (ECAE) through a 150° die with sequential 180° rotations, and the pore morphology and Vickers hardness after the extrusion were investigated. The Vickers hardness increases with increasing number of passes in the extrusions both parallel and perpendicular to the pore direction, accompanied by the decrease of porosity. The densification occurs more easily in the perpendicular extrusions than in the parallel extrusions, and the large deformation by the densification gives r
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Zhao, Xiao Lian, Ning Ning Zhao, and Na Chen. "Effect of Extrusion Size on Forming Process in Equal Channel Angular Pressing." Applied Mechanics and Materials 275-277 (January 2013): 2171–75. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.2171.

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In order to meet the industrial demands for large-sized bulk ultrafine-grained materials, which were prepared by severe plastic deformation, the law curves of equivalent strain, equivalent stress and load of different-sized extrusions had been gotten by the finite element simulation of ECAP. The extrusion size has little effect on the values and distribution law of equivalent strain as well as the values of equivalent stress. With the increase of extrusion size, the distribution uniformity of equivalent stress decreases, and the extrusion load increases. Although the ECAP of the large-sized ex
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Myers, Amy J., Claire E. Harnett, Eoghan P. Holohan, Thomas R. Walter, and Michael J. Heap. "The geometric spectrum of lava domes and spines." Volcanica 7, no. 2 (2024): 665–84. http://dx.doi.org/10.30909/vol.07.02.665684.

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Extrusion of viscous lava produces domes and spines, collapses of which pose a significant local hazard. Understanding extrusion processes and probabilistic hazard estimation require comprehensive datasets of geometric parameters. We introduce Morphology of Viscous Extrusions (MoVE), a collation of 323 observations of height and width from 80 extrusions at 46 volcanoes globally with compositions spanning basaltic through rhyolitic. Filtering this dataset for sample size, age, and time series overrepresentation reduces the composition range to basaltic-andesitic through dacitic, for which we do
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Jiang, Qifeng, Ramdane Boulahia, Fahmi Zaïri, et al. "Microstructure and Mechanical Properties of Severely Deformed Polypropylene in ECAE (Equal Channel Angular Extrusion) via Routes A and C." Polymers 14, no. 23 (2022): 5287. http://dx.doi.org/10.3390/polym14235287.

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Equal channel angular extrusion (ECAE) is a solid-state extrusion process for modifying microstructures via severe plastic deformation without modifying the specimen cross section. In this study, changes in the microstructure and mechanical properties of polypropylene resulting from extrusion orientation route A (no rotation between extrusions) and extrusion orientation route C (a rotation of 180° between extrusions) are investigated using a 90° die-angle tooling outfitted with back pressure. Important differences are reported for the ECAE-induced deformation behavior between the two processin
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Xue, Yong, Zhi Min Zhang, and Li Hui Lang. "Effect of Forward Extrusion and Heat Treatment on Microstructure and Mechanical Properties of as-Cast ZK60 Magnesium Alloy." Advanced Materials Research 148-149 (October 2010): 332–37. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.332.

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In the present research, the influences of different extrusion ratios (15, 30, 45, 60, and 75), extrusion temperatures (300 , 340 , 380 , 420 , and 460 ), and subsequent heat treatment on the mechanical properties and microstructure of as-cast ZK60 magnesium alloy have been investigated through the tensile tests and via metallographic observation. The results show that forward extrusion process can refine the microstructure of as-cast ZK60 alloy effectively. If as-cast ZK60 alloys have been extruded with the extrusion ratio 45 at 380 ,420 and 460 , respectively, and then post-heat treatment wa
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Bocato, Jessica Rico, Flávia Maria Cheffer Nory, Josimar Rosa Francisco, et al. "Interdisciplinary Orthodontic Treatment to Reestablishment Smile Function and Aesthetics." Journal of Health Sciences 22, no. 3 (2021): 167–72. http://dx.doi.org/10.17921/2447-8938.2021v22n3p167-172.

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AbstractExtrusive tooth movements are an important resource in orthodontic treatment and allow the manipulation of teeth and periodontal tissues. They can be performed quickly or slowly, depending on the patient’s need. Rapid extrusion is indicated for cases in need of prosthetic preparation or restoration, where the bone and gingival tissues are intact, such as horizontal and oblique fractures, coronary or external root resorption, iatrogenic perforations (trepanations) and the presence of subgingival caries. The aim of this study is to describe the treatment of a patient who had a coronary f
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Dissertations / Theses on the topic "Extrusion"

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Santoro, Gianmarco. "Mixed alloy chip extrusion." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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The aim of the investigation is to characterize the behaviour of billets composed of different aluminium alloys chips, shape and size. The billets were processed by plastic deformation in order to obtain useful parameters to make final products with good aesthetic-structural characteristics. This is made possible by direct recycle of chips with plastic deformation processes, in specific with a chip-based hot extrusion process. This technique is very interesting at an industrial level where the chips coming from various aluminium alloy machining procedures are accumulated together. The classic
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Lüssi, Cécile. "Signature-based extrusion detection." Zürich : Eidgenössische Technische Hochschule Zürich, Institut für Technische Informatik und Kommunikationsnetze, 2008. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=411.

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Bryner, Thomas K. "The composite extrusion process." Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182284434.

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Peck, Martin Clive. "Roller extrusion of pastes." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417961.

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Caldwell, L. "Modelling of polymer extrusion." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419561.

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Gerginov, Branimir Borissov. "Investigations into continuous extrusion." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47445.

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Beaumel, Christian. "Extrusion des pâtes d'argiles." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0056.

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L'industrie de la terre cuite valorise les materiaux de la terre en extrudant des pates d'argiles. Le but de cette etude est la maitrise de la mise en forme a vitesse elevee de ces pates et des defauts d'extrusion. La caracterisation des proprietes physiques et rheologiques des pates, notamment dans des conditions non consolidees et non drainees, les fait apparaitre comme des materiaux plastiques heterogenes. Les proprietes d'interface des pates sont caracterisees grace a un tribometre concu pour l'etude des frottements a vitesse elevee. Nous proposons une loi de frottement suggerant un coupla
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Borghi, Nicolas. "Nanotubes membranaires : extrusion hydrodynamique." Paris 6, 2006. http://www.theses.fr/2006PA066556.

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Almeida, Rosemeire dos Santos. "Influência da velocidade de rotação no processo de extrusão do polipropileno virgem e reciclado." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266923.

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Orientador: João Sinézio de Carvalho Campos<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-17T10:17:41Z (GMT). No. of bitstreams: 1 Almeida_RosemeiredosSantos_M.pdf: 1496479 bytes, checksum: b8bf05066c4483752cebde2f006e95c6 (MD5) Previous issue date: 2010<br>Resumo: E bem conhecido o amplo uso de materiais poliméricos e o proporcional impacto que eles causam quando são descartados no meio ambiente, especialmente os "commodities" como Polipropileno (PP) e Polietileno (PE). Isso tem preocupado os cientistas,
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Samy, Sekhar. "Multiple extrusion of superconducting wires." Ohio : Ohio University, 1990. http://www.ohiolink.edu/etd/view.cgi?ohiou1183473010.

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Books on the topic "Extrusion"

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Gale, G. M. Extrusion. Rapra Technology Ltd., 1989.

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White, James L., and Helmut Potente, eds. Screw Extrusion. Carl Hanser Verlag GmbH & Co. KG, 2002. http://dx.doi.org/10.3139/9783446434189.

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Harris, Holton E. Extrusion Control. Carl Hanser Verlag GmbH & Co. KG, 2004. http://dx.doi.org/10.3139/9783446434271.

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Rauwendaal, Chris. Polymer Extrusion. Carl Hanser Verlag GmbH & Co. KG, 2014. http://dx.doi.org/10.3139/9781569905395.

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Inoue, Nobuo, and Masao Nishihara, eds. Hydrostatic Extrusion. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4954-6.

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Repka, Michael A., Nigel Langley, and James DiNunzio, eds. Melt Extrusion. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8432-5.

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Beyer, Günter, and Christian Hopmann, eds. Reactive Extrusion. Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527801541.

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Lafleur, Pierre G., and Bruno Vergnes. Polymer Extrusion. John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118827123.

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Rauwendaal, Chris. Polymer extrusion. Hanser Publishers, 1986.

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Rauwendaal, Chris. Polymer Extrusion. Carl Hanser Verlag GmbH & Co. KG, 2014. http://dx.doi.org/10.1007/978-1-56990-539-5.

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Book chapters on the topic "Extrusion"

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Stvren, Sigurd, and Per Thomas Moe. "Extrusion." In Encyclopedia of Aluminum and Its Alloys. CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000414.

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The article will provide the reader with practical aspects of extrusion as well as an overview of the theoretical work and current challenges of this important aluminum alloy processing technology. This article is divided into three main sections: basic parameters for designing a section or die, an overview of extrusion processing, and optimization of productivity, cost and quality. Specific topical coverage includes: basic extrusion parameters, manufacturing of extrusions process review, productivity, quality including dimensional stability, surface quality, corrosion, cracking and tearing, p
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"Extrusion of Soft- and Medium-Grade Alloys." In Aluminum Extrusion Technology. ASM International, 2000. http://dx.doi.org/10.31399/asm.tb.aet.t68260149.

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Abstract This chapter discusses the extrusion characteristics of relatively soft aluminum alloys. It begins by identifying alloy designations within the class and the types of extrusions made from them. It then explains how extruded shapes and cross-sections are defined and how to analyze and assess important process variables such as runout, extrusion pressure, ram speed, and butt thickness. It also provides best practices for various operations and explains how to identify and remedy common extrusion defects.
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"Tribology and Thermodynamics in Extrusion." In Aluminum Extrusion Technology, Second Edition. ASM International, 2025. https://doi.org/10.31399/asm.tb.aet2.t59420025.

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Abstract Tribology plays a critical role in extrusion. This chapter provides an overview of tribology in extrusions including a discussion about the friction models at various locations of the extrusion tooling/die material interfaces and a discussion about wear and lubrication in extrusion die and tooling. The chapter shows a flow diagram highlighting the significant input variables necessary for computer simulation using the fundamentals of friction and thermodynamics models. The chapter explains the influence of principal variables on temperature rise in extrusion. It describes the most com
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"Aluminum Extrusion and Wire Drawing." In Aluminum: Technology, Industry, and Applications. ASM International, 2023. http://dx.doi.org/10.31399/asm.tb.atia.t59340143.

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Abstract Aluminum shapes, rod, bar, tubes, and wire may be produced directly as extrusions or by subsequent processing of continuous cast stock. This chapter describes the key aspects of aluminum extrusion and wire production focusing on the more common hot extrusion process and presenting the general types of aluminum extrusion alloys. An overview of free-machining alloys and products, and weldable 6xxx and 7xxx high-strength structural alloys is also provided.
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"Process Control in the Aluminum Extrusion Plant." In Aluminum Extrusion Technology. ASM International, 2000. http://dx.doi.org/10.31399/asm.tb.aet.t68260213.

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Abstract This chapter provides guidelines on how to set up and run an effective quality-improvement program for aluminum extrusion operations. It begins by identifying production processes and variables that impact the quality of hard and soft alloy extrusions. It then presents a series of checklists and flowcharts that can be used to monitor and troubleshoot billet-making and extrusion processes, die construction, equipment maintenance, heat treating, and sawing and stretching procedures. It also discusses the importance of charting test results and monitoring surface treatments that may be r
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Wagner, John R., Eldridge M. Mount, and Harold F. Giles. "Preface." In Extrusion. Elsevier, 2005. http://dx.doi.org/10.1016/b978-081551473-2.50001-5.

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Giles, Harold F., John R. Wagner, and Eldridge M. Mount. "Extrusion Process." In Extrusion. Elsevier, 2005. http://dx.doi.org/10.1016/b978-081551473-2.50002-7.

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Giles, Harold F., John R. Wagner, and Eldridge M. Mount. "Extruder Safety." In Extrusion. Elsevier, 2005. http://dx.doi.org/10.1016/b978-081551473-2.50003-9.

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Giles, Harold F., John R. Wagner, and Eldridge M. Mount. "Single Screw Extruder: Equipment." In Extrusion. Elsevier, 2005. http://dx.doi.org/10.1016/b978-081551473-2.50004-0.

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Giles, Harold F., John R. Wagner, and Eldridge M. Mount. "Plastic Behavior in the Extruder." In Extrusion. Elsevier, 2005. http://dx.doi.org/10.1016/b978-081551473-2.50005-2.

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Conference papers on the topic "Extrusion"

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Slobodník, Karel, Michal Prokeš, Jan Rejzek, and Lenka Šroubová. "Numerical simulation of ceramic material extrusion." In 2024 25th International Conference on Computational Problems of Electrical Engineering (CPEE). IEEE, 2024. http://dx.doi.org/10.1109/cpee64152.2024.10720400.

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Chi, X. P., S. Yang, and J. R. G. Evans. "Extrusion Pressure Generated in High Alumina Content Paste Extrusion." In 2010 International Conference on Manufacturing Automation (ICMA). IEEE, 2010. http://dx.doi.org/10.1109/icma.2010.28.

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Suryanarayana, Ramesh Chinnakurli, Sikhakolli Ramakrishna, Ummar Khan Attaullah, Smitha Hanumantha Badnur, and Kumar Saheb. "Effect of Extrusion Parameters on Mechanical Properties of Al6061-Ni-P Coated SiC Composites." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63490.

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Extrusion of metal matrix composites (MMCs) is a very challenging one where in the bond between the reinforcement and the matrix alloy is crucial in getting high quality extrusions for industrial applications. In recent years researchers are focusing on developing aluminium based composites with metallic coated reinforcement to achieve good interfacial bonds to ensure smooth load transfer from the matrix on to reinforcement. However no information is available as regards hot extrusion of metallic coated reinforced MMCs. In the light of the above, the present work focuses on a systematic invest
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Jayaseelan, V., Arunvasantha Geethan, J. Francis Xavier, R. Srimurugan, and S. Vijay Ananth. "Optimizations of extrusion semidie angle and fabrication of extrusion die." In PROCEEDINGS OF INTERNATIONAL CONFERENCE ON RECENT TRENDS IN MECHANICAL AND MATERIALS ENGINEERING: ICRTMME 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0025152.

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Poy Ignacio, Guilherme. "Friction extrusion from AlMgSi machining waste at high extrusion ratio." In Material Forming. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-79.

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Abstract. The study investigates the variation of mechanical and microstructural properties during the extrusion of 18.7 m of fine wire from AlMgSi alloy chips under high extrusion ratio. The processing conditions varied throughout the process (velocity, torque and temperature), resulting in significant differences in mechanical properties and microstructural evolution. The results highlight the impact of temperature on the degradation of mechanical properties, particularly Ultimate Tensile Strength and elongation. On the other hand, hardness is primarily influenced by the plastic deformation
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Touré, Birane, Jiri Svabik, Michael Veaux, et al. "Numerical simulation of extrusion: A good tool for troubleshooting extrusion problems." In NOVEL TRENDS IN RHEOLOGY V. AIP, 2013. http://dx.doi.org/10.1063/1.4802608.

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KNIAZKIN, I. "Comprehensive analysis of waving defects in aluminium profile extrusion." In Material Forming. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-78.

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Abstract. Waving defects in extruded aluminium profiles pose significant challenges to achieving the stringent geometrical tolerances required in industries such as automotive manufacturing. These defects, driven by flow velocity and thermal gradient imbalances, often emerge during later stages of the extrusion process, complicating early detection and mitigation efforts. This study investigates the mechanisms underlying waving defects through comprehensive simulations of industrial and benchmark profiles using QForm UK software. Critical insights into defect formation were achieved by analysi
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WILLIAMS, W. M. "Yield stress and work hardening behavior of extruded AA6082 profiles under different homogenization and extrusion conditions." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-51.

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Abstract. The mechanical properties of extruded AlMgSi alloys are affected by the applied thermo-mechanical parameters employed during the entire production process. In the following, the effect of different extrusion speeds and homogenization conditions paired with either air or water quenching, is examined on four different sets of rectangular hollow AA6082-T4 profiles. These profiles were fabricated and extruded under industrial conditions and selected cross sections of each profile were examined by optical microscopy to determine the microstructure and level of recrystallization. Uniaxial
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Macrae, J. "Zero Extrusion Casing Patch." In SPE/IADC Drilling Conference. Society of Petroleum Engineers, 1997. http://dx.doi.org/10.2118/37650-ms.

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Ferrucci, Vincenzo. "Generalised extrusion of polyhedra." In Proceedings on the second ACM symposium. ACM Press, 1993. http://dx.doi.org/10.1145/164360.164376.

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Reports on the topic "Extrusion"

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Pace, David, and Brady Mackowiak. Extrusion Development Report. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1476746.

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Velghe, Ineke, Bart Buffel, Veerle Vandeginste, Wim Thielemans, and Frederik Desplentere. Modelling hydrolytic, thermal, and mechanical degradation of PLA during single-screw extrusion. Universidad de los Andes, 2024. https://doi.org/10.51573/andes.pps39.ss.dbc.1.

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Since melt processing causes degradation of poly(lactic acid) or PLA, it is crucial to understand the effect of extrusion conditions on the molecular weight reduction. Kinetic models found in literature are promising tools to describe hydrolytic, thermal, and mechanical degradation during extrusion. In order to use these models, extrusion parameters (that are equipment dependent) should be translated into the four fundamental parameters that determine degradation: moisture content in PLA, residence time, shear stress history and temperature history. This work presents a methodology to use nume
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Moore, Glenn. Salt Lubricant Pads for U Extrusion. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1482121.

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Janney, M. A., M. C. Vance, A. C. Jordan, and M. P. Kertesz. Bibliography of ceramic extrusion and plasticity. Office of Scientific and Technical Information (OSTI), 1987. http://dx.doi.org/10.2172/6545977.

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Calvert, Paul. Smart Materials by Extrusion Solid Freeform Fabrication. Defense Technical Information Center, 2000. http://dx.doi.org/10.21236/ada376056.

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Bingert, J. F., B. L. Bingham, R. J. Sebring, and A. M. Kelly. Hydrostatic extrusion of BSCCO/Ag composite wire. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/41364.

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Janney, M., E. Bomar, and M. Vance. Extrusion of alumina-silicon carbide whisker composites. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/5374440.

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Allen, Jeffrey, and Guillermo Riveros. Mesoscale multiphysics simulations of the fused deposition additive manufacturing process. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48595.

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As part of an ongoing effort to better understand the multiscale effects of fused deposition additive manufacturing, this work centers on a multiphysics, mesoscale approach for the simulation of the extrusion and solidification processes associated with fused deposition modeling. Restricting the work to a single line scan, we focus on the application of polylactic acid. In addition to heat, momentum, and mass transfer, the solid-liquid–vapor interface is simulated using a front-tracking, level-set method. The results focus on the evolving temperature, viscosity, and volume fraction and are cas
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Cerreta, Ellen Kathleen. Zr Extrusion – Direct Input for Models & Validation. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1374291.

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Kenneth Sprouse and David Matthews. Linear Extrusion 400 Tons/Day Dry Solids Pump. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/1001421.

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