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Статті в журналах з теми "Manufacturing of Metals"

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Wadley, H. N. G. "Cellular Metals Manufacturing." Advanced Engineering Materials 4, no. 10 (October 14, 2002): 726–33. http://dx.doi.org/10.1002/1527-2648(20021014)4:10<726::aid-adem726>3.0.co;2-y.

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Herzog, Dirk, Vanessa Seyda, Eric Wycisk, and Claus Emmelmann. "Additive manufacturing of metals." Acta Materialia 117 (September 2016): 371–92. http://dx.doi.org/10.1016/j.actamat.2016.07.019.

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Tesfaye, Fiseha, Naiyang Ma, and Mingming Zhang. "Cleaner Manufacturing of Critical Metals." JOM 72, no. 2 (January 6, 2020): 764–65. http://dx.doi.org/10.1007/s11837-019-03976-w.

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Kumar, Sanjay, and Sisa Pityana. "Laser-Based Additive Manufacturing of Metals." Advanced Materials Research 227 (April 2011): 92–95. http://dx.doi.org/10.4028/www.scientific.net/amr.227.92.

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Анотація:
For making metallic products through Additive Manufacturing (AM) processes, laser-based systems play very significant roles. Laser-based processes such as Selective Laser Melting (SLM) and Laser Engineered Net Shaping (LENS) are dominating processes while Laminated Object Manufacturing (LOM) has also been used. The paper will highlight key issues without going into details and try to present comparative pictures of the aforementioned processes. The issues included are machine, materials, applications, comparison, various possibilities and future works.
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Oh, Ji-Won, Jinsu Park, and Hanshin Choi. "Multi-step Metals Additive Manufacturing Technologies." Journal of Korean Powder Metallurgy Institute 27, no. 3 (June 30, 2020): 256–67. http://dx.doi.org/10.4150/kpmi.2020.27.3.256.

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Jadhav, Nisha Ramesh. "Metallic Additive Manufacturing." International Journal for Research in Applied Science and Engineering Technology 10, no. 2 (February 28, 2022): 66–67. http://dx.doi.org/10.22214/ijraset.2022.40188.

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Abstract: As metallic additive manufacturing grew in many areas, many users have requested greater control over the systems, namely the ability to change the process parameters. The goal of this paper is to review the effects of major process parameters on the quality such as porosity, residual stress, and composition changes and materials properties like microstructure and microsegregation. In this article, we give an overview over the different kinds of metals specially steels in additive manufacturing processes and present their microstructures, their mechanical and corrosion properties, and their heat treatments and their application. Our aim is to detect the microstructures as well as the mechanical and electrochemical properties of metals specially the steels. Steels are subjected during additive manufacturing processing to time-temperature profiles which are very different from the conventional process. We do not describe in detail the additive manufacturing process parameters required to achieve dense parts. We discuss the impact of process parameters on the microstructure, where necessary.
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SAIDA, Kazuyoshi. "Crystalline Control in Additive Manufacturing of Metals." Journal of Smart Processing 6, no. 3 (2017): 115–18. http://dx.doi.org/10.7791/jspmee.6.115.

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Suter, M., E. Weingärtner, and K. Wegener. "MHD printhead for additive manufacturing of metals." Procedia CIRP 2 (2012): 102–6. http://dx.doi.org/10.1016/j.procir.2012.05.049.

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Furumoto, Tatsuaki. "Special Issue on Additive Manufacturing with Metals." International Journal of Automation Technology 13, no. 3 (May 5, 2019): 329. http://dx.doi.org/10.20965/ijat.2019.p0329.

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Additive manufacturing (AM) with metals is currently one of the most promising techniques for 3D-printed structures, as it has tremendous potential to produce complex, lightweight, and functionally-optimized parts. The medical, aerospace, and automotive industries are some of the many expected to reap particular benefits from the ability to produce high-quality models with reduced manufacturing costs and lead times. The main advantages of AM with metals are the flexibility of the process and the wide variety of metal materials that are available. Various materials, including steel, titanium, aluminum alloys, and nickel-based alloys, can be employed to produce end products. The objective of this special issue is to collect recent research works focusing on AM with metals. This issue includes 5 papers covering the following topics: ===danraku===- Powder bed fusion (PBF) ===danraku===- Directed energy deposition (DED) ===danraku===- Wire and arc-based AM (WAAM) ===danraku===- Binder jetting (BJT) ===danraku===- Fused deposition modeling (FDM) This issue is expected to help readers understand recent developments in AM, leading to further research. We deeply appreciate the contributions of all authors and thank the reviewers for their incisive efforts.
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Lee, Kee-Ahn, Jae-Sung Oh, Young-Min Kong, and Byoung-Kee Kim. "Manufacturing And High Temperature Oxidation Properties Of Electro-Sprayed Fe-24.5% Cr-5%Al Powder Porous Metal." Archives of Metallurgy and Materials 60, no. 2 (June 1, 2015): 1169–73. http://dx.doi.org/10.1515/amm-2015-0091.

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Abstract Fe-Cr-Al based Powder porous metals were manufactured using a new electro-spray process, and the microstructures and high-temperature oxidation properties were examined. The porous materials were obtained at different sintering temperatures (1350°C, 1400°C, 1450°C, and 1500°)C and with different pore sizes (500 μm, 450 μm, and 200 μm). High-temperature oxidation experiments (TGA, Thermal Gravimetry Analysis) were conducted for 24 hours at 1000°C in a 79% N2+ 21% O2, 100 mL/min. atmosphere. The Fe-Cr-Al powder porous metals manufactured through the electro-spray process showed more-excellent oxidation resistance as sintering temperature and pore size increased. In addition, the fact that the densities and surface areas of the abovementioned powder porous metals had the largest effects on the metal’s oxidation properties could be identified.
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Дисертації з теми "Manufacturing of Metals"

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Orrling, Diana. "Towards Abatement of Selected Emissions from Metals Manufacturing." Doctoral thesis, KTH, Materialens processvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-26107.

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Although the metallurgical industry has made great strides in the reduction of unwanted emissions to the atmosphere as a result of production processes, significant challenges still exist. From a global perspective, even large reductions in emissions per produced ton become immaterial when considering that the total world production of metals continues to increase. Two such particularly hazardous emissions are sulfur dioxide, primarily from copper ore roasting, and mercury, which has had increasing emissions from the steel industry in recent years. Both pollutants have severe consequences for the environment and also for human health. The primary motivations of this work have hence been: (1). to study sulfate formation on soot from sulfur dioxide emissions reacting with ozone and H2O in the vapor phase and (2). to study factors involving the behavior of mercury adsorption on metal surfaces involved in steelmaking, in order to further the understanding of select emissions from scrap-based steelmaking. Gas phase experiments were conducted to examine the heterogeneous oxidation of sulfur dioxide on soot in the presence of ozone and water vapor. The sulfur dioxide oxidation into sulfate was quantified using a particle-into-liquid sampler coupled with ion chromatography to measure the sulfate formation at atmospheric pressure. Water vapor, ozone and sulfur dioxide concentrations were controlled. Due to the ozone oxidation, multilayer adsorption of sulfur dioxide on soot, as well as sulfate formation and physisorption on secondary surface layer sites were observed. The exposure also caused the soot to become hydrophilic, due to the sulfur dioxide adsorption and also likely the formation of carboxyl groups on the surface. No significant increase in sulfate formation was observed at ozone concentrations above 1000 ppm. The effects of common surface contaminants such as oxygen and chlorine were examined on the metal surfaces, as well as the impact of changes in temperature, with controlled conditions using thermal desorption auger electron spectroscopy. It was established that low temperatures (82 K through 111 K) were conducive to mercury adsorption, wherein physisorption and subsequent lateral mercury interactions in mercury adlayers occurred. Chlorine appeared to favor mercury uptake, as determined by the increased mercury coverage at low temperatures on polycrystalline iron, copper and zinc. Oxygen, however, was found to be an inhibitor of mercury, most notably at room temperature. It was surprising to establish that no mercury adsorbed on zinc surfaces at room temperature and only on polycrystalline samples at low temperature. The mercury signal intensity increased up to the limit of the melting temperature for iron systems, on the oxidized copper surface and the polycrystalline zinc surfaces, prior to desorption from the surfaces. It is suggested that this is due to a rearrangement of mercury atoms on the surface at increasing temperatures, whereas at 85 K, mercury adhered to its initial adsorption position. In other words, mercury wet these surfaces on annealing, transitioning from an islanded surface at low temperature to a smooth layer before desorption. Based on these results, it was concluded that the mercury bond to the oxidized surface was weakened compared to clean copper. Furthermore, it is proposed that a surface phase transition occurred on polycrystalline zinc prior to desorption. No such transition was observed on iron. Activation energies of desorption were calculated for the relevant metal surfaces. It was established that clean iron had the highest activation energy of desorption. The large bond strength between mercury and iron may account for the highest desorption temperature of the iron systems. Zinc and copper had similar activation energies and desorption temperatures, which were respectively lower than that of iron. X-Ray Photoelectron and Auger Electron Spectroscopy were used to ascertain common surface contamination, i.e. chlorine, oxygen and sulfur, which affected mercury adsorption. Laser Ablation Inductively Coupled Plasma Time of Flight Mass Spectrometry was used to determine the depth of mercury adsorption on the samples. The technique also showed that the samples contained mercury in the surface layers. Accompanied by the rising demand for metals is the increase in emissions from metals manufacturing. Moreover, it is critical to minimize sulfur dioxide emissions as particulates from soot continue to be released in the atmosphere. For scrap-based steelmaking, monolayer mercury adsorption on clean iron and copper at room temperature are significant results. With the rising use of electronic devices in vehicles, the sorting of scrap becomes increasingly important. Mercury not adsorbing on zinc at room temperature is also of relevance as it disproves the theory of increased mercury adsorption with the increased use of galvanized scrap in summer conditions. However, the low temperature studies showed multilayer adsorption of mercury on iron, zinc and copper, which has relevance for the reported temporal variations of mercury deposition in arctic regions. Keywords: mercury, iron, zinc, sulfur dioxide, adsorption, pollution, thermal desorption, polycrystalline, surfaces, spectroscopy
QC 20120326
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Voisey, Kathleen Theresa O'Sullivan. "Laser drilling of metals and ceramics." Thesis, University of Cambridge, 2002. https://www.repository.cam.ac.uk/handle/1810/272329.

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Fan, Zongyue. "A Lagrangian Meshfree Simulation Framework for Additive Manufacturing of Metals." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1619737226226133.

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Shen, Ninggang. "Microstructure prediction of severe plastic deformation manufacturing processes for metals." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6282.

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The objective of the research presented in this thesis has been to develop a physics-based dislocation density-based numerical framework to simulate microstructure evolution in severe plastic deformation (SPD) manufacturing processes for different materials. Different mechanisms of microstructure evolution in SPD manufacturing processes were investigated and summarized for different materials under dynamic or high strain rates over a wide temperature range. Thorough literature reviews were performed to clarify discrepancies of the mechanism responsible for the formation of nanocrystalline structure in the machined surface layer under both low-temperature and high-temperature conditions. Under this framework, metallo-thermo-mechanically (MTM) coupled finite element (FE) models were developed to predict the microstructure evolution during different SPD manufacturing processes. Different material flow stress responses were modeled subject to responsible plastic deformation mechanisms. These MTM coupled FE models successfully captured the microstructure evolution process for various materials subjected to multiple mechanisms. Cellular automaton models were developed for SPD manufacturing processes under intermediate to high strain rates for the first time to simulate the microstructure evolution subjected to discontinuous dynamic recrystallization and thermally driven grain growth. The cellular automaton simulations revealed that the recrystallization process usually cannot be completed by the end of the plastic deformation under intermediate to high strain rates. The completion of the recrystallization process during the cooling stage after the plastic deformation process was modeled for the first time for SPD manufacturing processes at elevated temperatures.
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Holt, Linda Ann. "A Cross-Regional Comparison of Fabricated Metals' Manufacturing Sector Resiliency." ScholarWorks, 2015. https://scholarworks.waldenu.edu/dissertations/1704.

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Fabricated metals' manufacturing sector employment in the United States declined following the onset of the 2008 recession. Premium compensation and benefits afforded to employees within the manufacturing sector amplified the negative effects of recessionary job losses. Using the regional macroeconomic complex adaptive systems (CAS) framework, the purpose of this study was to examine the geographic distribution of job losses, recovery rates, and adaptive behavior after the recession for the fabricated metals manufacturing sector by measuring and comparing effects in 50 East North Central division MSAs and 50 South Atlantic division MSAs in the United States. Independent sample t tests compared average job level change rates for the tested regions. Significant differences in mean job loss rates for the two divisions occurred between 2008 and 2010 and in mean job recovery rates between 2010 and 2012. A multiple regression model analyzed the relationship of the dependent variable post-recession employment level changes with the independent variables defined as workforce demographic changes and establishment level changes as indicators of adaptive behavior. Results revealed a significant relationship between the dependent variable and shifts in the workforce demographic profile but did not reveal a significant relationship between the dependent variable and changes in the number of firms engaged in this sector. This study forms the genesis of background data for measuring cross-regional performance in the presence of external shocks and serves as a foundation for developing incentive models based on thriving sectors and regions for individuals, organizational groups, and society as a whole in engendering economic growth and well-being.
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Jefferson, Bea A. "Clusters and cluster policy : advanced manufacturing and metals industries in South Yorkshire." Thesis, University of Sheffield, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412792.

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Berglund, Lina, Filip Ivarsson, and Marcus Rostmark. "Crucial Parameters for Additive Manufacturing of Metals : A Study in Quality Improvement." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254785.

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Production by Additive Manufacturing creates opportunities to make customized products in small batches with less material than in traditional manufacturing. It is more sustainable and suitable for niche products, but entails new production demands to ensure quality. The goal of this study is to define the most crucial parameters when creating Additive Manufactured products in metal and suggest tools for quality improvement. This is done by analysing earlier studies and evaluating the standard production procedures for manufacturing by Selective Laser Melting. The results from this study stated that porosity and insufficiencies in shape are the most common factors leading to deviation in quality. To avoid it, the most crucial parameters to consider are; The laser freeform fabrication-system related parameters, hatch distance, laser power, layer thickness, fscanning pattern, scan speed and flowability of the powder. Concluded is also that crucial parameters within additive manufacturing are very dependent on the definition of quality for a certain product and can therefore vary. By continuous collection and analysis of data, the task of improving quality will be simplified.
Produktion genom Additiv Tillverkning möjliggör tillverkande av skräddarsydda produkter i små batcher och med mindre material än vid traditionell tillverkning. Det är ett mer hållbart tillverkningssätt och mer passande för nischprodukter, men innebär nya produktionskrav för att säkerhetsställa bra kvalitet. Målet med denna studie är att definiera de viktigaste parametrarna vid Additiv Tillverkning av produkter i metall och föreslå verktyg för att förbättra dem. Detta genom analys av tidigare studier och utvärdering av klassiska produktionsrutiner för Selective Laser Melting. Resultaten från denna studie visar att porositet och formfel är de vanligaste faktorerna som leder till bristande kvalitet. För att undvika detta är de viktigaste parametrarna att ta i beaktande; parametrar kopplade till "laser freeform fabrication"-system, distans mellan laserstrålar, kraft på lasern, lagertjocklek, skanningsmönster, fart på skanningen och flytbarhet på pulvret. Slutsatsen pekar även på att avgörande parametrar inom Additiv Tillverkning beror på definitionen av kvalitet för en speciell produkt och kan därför variera. Genom kontinuerlig insamling och analys av data kommer förbättringen av kvalitet förenklas markant.
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Moseley, Steven Glyn. "The diffusion bonding of ceramics to metals by hot isostatic pressing." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364380.

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Davis, Trevor. "Formability and strength of sheet metals subjected to complex strain paths." Thesis, Aston University, 1985. http://publications.aston.ac.uk/11872/.

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PAKKANEN, JUKKA ANTERO. "Designing for Additive Manufacturing - Product and Process Driven Design for Metals and Polymers." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2714732.

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Additive Manufacturing (AM) has broken through to common awareness and to wider industrial utilization in the past decade. The advance of this young technology is still rapid. In spoken language additive manufacturing is referred as 3D printing for plastic material and additive manufacturing is left as an umbrella term for other materials i.e. metallic materials and ceramics. As the utilization of AM becomes more widespread, the design for additive manufacturing becomes more crucial as well as its standardization. Additive manufacturing provides new set of rules with different design freedom in comparison with subtractive manufacturing methods. This is thought to empower product driven designs. However, in the AM methods there are process driven variables that limit the designs functions to what could be manufactured. There are often extra steps after production to finalize the design. Topology optimization utilizes product driven design where material is only where it is needed to be. The design is computed without taking into account any manufacturing constrains and only the design in the final application stage is achieved. Topology optimization algorithm is explored in detail for two algorithms. Then these algorithms are compared in case study I to gain better understanding of the algorithms functions. Case study I consists of 2D and 3D algorithms where a 3D level set method algorithm was written for this purpose. The concept of designing for additive manufacturing is examined for polymeric materials in case study II with a help of topology optimization design software tailored for additive manufacturing market. The parts are manufactured with different AM methods, examined and results are explained. The results show an interesting effect of anisotropy and the manufacture methods effect in the part mechanical properties. On the other hand, process driven design and its concepts important as the manufacturing method dictates, what can and should be done economically. Metal AM process constraints are explored in case study III through accuracy studies in metal additive manufacturing at laser powder bed fusion (LPBF) technology. Accuracy and surface studies are concluded to gain a better understanding of the process and manufacturability of metal parts. The gain knowledge is explaned and examples are shown how these are utilized to make metal parts with tailored properties and with minimal post processing needs.
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Книги з теми "Manufacturing of Metals"

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author, Weheba Gamal S., ed. Manufacturing processes & materials. Dearborn, Michigan: Society of Manufacturing Engineers, 2015.

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K, Elshennawy Ahmad, and Doyle Lawrence E, eds. Manufacturing processes & materials. 4th ed. Dearborn, Mich: Society of Manufacturing Engineers, 2000.

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Milewski, John O. Additive Manufacturing of Metals. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58205-4.

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E, Doyle Lawrence. Manufacturing processes and materials for engineers. 3rd ed. Englewood Cliffs, N.J: Prentice-Hall, 1985.

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J, Bibby M., ed. Principles of metal manufacturing processes. London: Arnold, 1999.

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Patel, Janki, ed. Data-Driven Modeling for Additive Manufacturing of Metals. Washington, D.C.: National Academies Press, 2019. http://dx.doi.org/10.17226/25481.

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Ladani, Leila. Additive manufacturing of metals: Materials, processes, tests, and standards. Lancaster, Pennsylvania: DEStech Publications, Inc, 2020.

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National Heat Transfer Conference (28th 1991 Minneapolis, Minn.). Heat transfer in metals and containerless processing and manufacturing. New York, N.Y: American Society of Mechanical Engineers, 1991.

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Associates, Perrin Quarles, and United States. Environmental Protection Agency., eds. Compliance and enforcement trends in the nonferrous metals smelting sector and at other selected metal manufacturing facilities. [Charlottesville, VA]: Perrin Quarles Associates, Inc., 2000.

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Associates, Perrin Quarles, and United States. Environmental Protection Agency, eds. Compliance and enforcement trends in the nonferrous metals smelting sector and at other selected metal manufacturing facilities. [Charlottesville, VA]: Perrin Quarles Associates, Inc., 2000.

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Частини книг з теми "Manufacturing of Metals"

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Youssef, Helmi A., Hassan A. El-Hofy, and Mahmoud H. Ahmed. "Structure of Metals and Alloys." In Manufacturing Technology, 33–56. 2nd ed. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003373209-3.

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Saxena, Prateek, Michail Papanikolaou, Emanuele Pagone, Konstantinos Salonitis, and Mark R. Jolly. "Digital Manufacturing for Foundries 4.0." In Light Metals 2020, 1019–25. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36408-3_138.

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Youssef, Helmi A., Hassan A. El-Hofy, and Mahmoud H. Ahmed. "Heat Treatment of Metals and Alloys." In Manufacturing Technology, 91–127. 2nd ed. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003373209-5.

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Bernhard, Robert, Philipp Neef, Henning Wiche, Volker Wesling, Christian Hoff, Jörg Hermsdorf, and Stefan Kaierle. "Laser Cladding – Additive Manufacturing." In Laser Cladding of Metals, 1–8. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53195-9_1.

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Qingcai, Zhao, Zhao Jingli, Miao Xingli, and Wang Lihai. "Energy Saving Technologies for Anode Manufacturing." In Light Metals 2012, 1201–4. Cham: Springer International Publishing, 2012. http://dx.doi.org/10.1007/978-3-319-48179-1_207.

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Qingcai, Zhao, Zhao Jingli, Miao Xingli, and Wang Lihai. "Energy Saving Technologies for Anode Manufacturing." In Light Metals 2012, 1201–4. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118359259.ch207.

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Salandro, Wesley A., Joshua J. Jones, Cristina Bunget, Laine Mears, and John T. Roth. "Deformation of Metals." In Springer Series in Advanced Manufacturing, 1–21. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08879-2_1.

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Tsumori, Fujio. "Laser Processing for Metals." In Multi-dimensional Additive Manufacturing, 27–33. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7910-3_2.

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Milewski, John O. "Understanding Metal for Additive Manufacturing." In Additive Manufacturing of Metals, 49–83. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58205-4_4.

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Cui, Di, Briac Lanfant, Marc Leparoux, and Sébastian Favre. "Additive Manufacturing of Ti-Nb Dissimilar Metals by Laser Metal Deposition." In Industrializing Additive Manufacturing, 96–111. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-54334-1_8.

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Тези доповідей конференцій з теми "Manufacturing of Metals"

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Kim, Sara E., Christoph O. Steinbruchel, Atul Kumar, and H. Bakhru. "Control of the interaction of metals with fluorinated silicon oxides." In Microelectronic Manufacturing, edited by Mart Graef and Divyesh N. Patel. SPIE, 1998. http://dx.doi.org/10.1117/12.324045.

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Franklin, Reynold, and Udaya B. Halabe. "Knowledge-based assistant for ultrasonic inspection in metals." In Intelligent Systems & Advanced Manufacturing, edited by Bhaskaran Gopalakrishnan, San Murugesan, Odo Struger, and Gerfried Zeichen. SPIE, 1997. http://dx.doi.org/10.1117/12.294438.

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3

Tessmann, Bryce, Kewei Li, and Xin Zhao. "Bidirectional Bending of Thin Metals With Femtosecond Lasers." In ASME 2022 17th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/msec2022-85222.

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Анотація:
Abstract Lasers have a wide range of manufacturing applications, one of which is the bending of metals. While there are multiple ways to induce bending in metals with lasers, this paper examines laser peen forming with femtosecond lasers on thin metals of 75-micrometer thickness perpendicular to the laser. The effects of multiple parameters, including laser energy, scan speed, scan pitch, and material preparation, on the bend angle of the metal are investigated. The bend angles are generated in both concave and convex directions, represented by positive and negative angles, respectively. While it is possible to create angles ranging from 0 to 90 degrees in the concave direction, the largest average convex angle found was only −26.2 degrees. The positive angles were created by high overlapping ratios and slow speeds. Furthermore, the concave angles were made by a smaller range of values than the convex angles, although this range could be expanded by higher laser energy. The positive angles also had a higher inconsistency than the negative angles, with an average standard deviation of 6.8 degrees versus an average of 2.6 degrees, respectively. The characterization of bending angles will allow for more accurate predictions, which will benefit traditional metal forming applications and more advanced applications such as origami structures with metal.
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4

Schniedenharn, Maximilian, Matthias Belting, Rui João Santos Batista, Wilhelm Meiners, and Andreas Weisheit. "Micro scale laser based additive manufacturing for metals." In ICALEO® 2013: 32nd International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2013. http://dx.doi.org/10.2351/1.5062946.

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5

Wagner, Scott W., Kenny Ng, William J. Emblom, and Jaime A. Camelio. "Influence of Continuous Direct Current on the Micro Tube Hydroforming Process." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50257.

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Research of the micro tube hydroforming (MTHF) process is being investigated for potential medical and fuel cell applications. This is largely due to the fact that at the macro scale the tube hydroforming (THF) process, like most metal forming processes has realized many advantages. Unfortunately, large forces and high pressures are required to form the parts so there is a large potential to create failed or defective parts. Electrically Assisted Manufacturing (EAM) and Electrically Assisted Forming (EAF) are processes that apply an electrical current to metal forming operations. The intent of both EAM and EAF is to use this applied electrical current to lower the metals required deformation energy and increase the metal’s formability. These tests have allowed the metals to be formed further than conventional methods without sacrificing strength or ductility. Currently, various metal forming processes have been investigated at the macro scale. These tests also used a variety of materials and have provided encouraging results. However, to date, there has not been any research conducted that documents the effects of applying Electrically Assisted Manufacturing (EAM) techniques to either the tube hydroforming process (THF) or the micro tube hydroforming process (MTHF). This study shows the effects of applying a continuous direct current to the MTHF process.
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6

Joong-Pyo Shim, Hong-Ki Lee, and Ju-Seong Lee. "The synthrsis of potassium hexatitanate and manufacturing alkaline fuel cell matrix." In International Conference on Science and Technology of Synthetic Metals. IEEE, 1994. http://dx.doi.org/10.1109/stsm.1994.836101.

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7

Shacham-Diam, Yosi Y., Boris Yokhin, Itzhak Mazor, Avishai Kepten, Roey Shaviv, and Ayelet Gabai. "In-line x-ray fluorescence metrology of metals and ultrathin barrier layers for ULSI applications." In Microelectronic Manufacturing, edited by Sergio A. Ajuria and Tim Z. Hossain. SPIE, 1998. http://dx.doi.org/10.1117/12.324424.

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8

Stofesky, David B. "Manufacturing With MicroECM." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21119.

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Electrochemical Machining (ECM) has been widely used as a non-traditional three dimensional machining process for a variety of industrial applications. Electrochemical processing permits material removal of metals as diverse as aluminum, brass, tool steels, stainless steels, and titanium. Using cathodic tooling, a conductive electrolyte flowing through the electrode gap, controllable power source, and Faraday’s Law, predictable volumes of metal can be removed from the anodic substrate. Faraday’s Law states that the rate of material removal is proportional to the process current and application time, while Ohm’s Law states that current is inversely proportional to the impedance of the (electrochemical) circuit. MicroECM™ is an application of the ECM process that involves the removal of miniscule volumes of material from anodic substrates while holding micron level dimensional tolerances. This paper describes the process, its requirements, and typical applications for microECM™.
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9

Udupa, Anirudh, Tatsuya Sugihara, and James B. Mann. "Glues Make Gummy Metals Easy to Cut." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2922.

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Abstract Metals such as Cu, Al, Ni, Ta and stainless steels, despite their softness and ductility, are considered difficult to machine. This is due to large cutting forces and corresponding formation of a very thick chip during cutting and hence these metals are referred to as “gummy”. Their poor machinability of these materials arises because of an unsteady and highly redundant mode of plastic deformation referred to as sinuous flow. The prevailing plastic deformation mode during machining can be overcome by the application of certain coatings and chemical media on the un-deformed free surface of the workpiece ahead of the cutting process. Using in-situ imaging and concurrent force measurements we present two different mechanochemical routes through which these media can improve machinability. The first route, which requires chemicals that adhere to the metal surface, such as glues and inks, improves cutting by inducing a change in the local plastic deformation mode — from sinuous flow to one characterized by periodic fracture or segmented flow. The second route, which requires chemicals that can react with the workpiece to form a low-friction layer, changes the sinuous flow mode to a smooth, laminar one. Both routes decrease cutting forces by more than 50% with order of magnitude improvement in surface texture as characterized by measured roughness and defect density. The results suggest a broad range of opportunities for improving performance of machining processes for many difficult-to-cut gummy metals.
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10

Kulkarni, N. A., R. S. Mahajan, N. V. Karanth, K. V. Phani Prabhakar, and G. Padmanabham. "Development of CAE Methodology for Joining of Dissimilar Metals Using Cold Metal Transfer and Its Validation." In International Conference on Automotive Materials & Manufacturing 2014. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2014. http://dx.doi.org/10.4271/2014-28-0017.

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Звіти організацій з теми "Manufacturing of Metals"

1

Burke, Stephen. Advanced Data Preparation Module for Metals Additive Manufacturing. Office of Scientific and Technical Information (OSTI), October 2020. http://dx.doi.org/10.2172/1673836.

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2

Scott, Elizabeth. Innovations in Advanced Materials and Metals Manufacturing Project (IAM2). Office of Scientific and Technical Information (OSTI), January 2017. http://dx.doi.org/10.2172/1369257.

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3

Babu, Sudarsanam Suresh, Lonnie J. Love, William H. Peter, and Ryan Dehoff. Workshop Report on Additive Manufacturing for Large-Scale Metal Components - Development and Deployment of Metal Big-Area-Additive-Manufacturing (Large-Scale Metals AM) System. Office of Scientific and Technical Information (OSTI), May 2016. http://dx.doi.org/10.2172/1325459.

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4

Dehoff, Ryan R., and Michael M. Kirka. Additive Manufacturing of Porous Metal. Office of Scientific and Technical Information (OSTI), June 2017. http://dx.doi.org/10.2172/1362246.

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5

Moran, Angela L., and Dawn R. White. Intelligent Processing for Spray Metal Manufacturing. Fort Belvoir, VA: Defense Technical Information Center, June 1990. http://dx.doi.org/10.21236/ada226499.

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6

Slattery, Kevin, and Eliana Fu. Unsettled Issues in Additive Manufacturing and Improved Sustainability in the Mobility Industry. SAE International, July 2021. http://dx.doi.org/10.4271/epr2021015.

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Additive manufacturing (AM), also known as “3D printing,” is often touted as a sustainable technology, especially for metal components, since it produces either net or near-net shapes versus traditionally machined pieces from larger mill products. While traditional machining from mill products is often the case in aerospace, most of the metal parts used in the world are made from flat-rolled metal and are quite efficient in utilization. Additionally, some aspects of the AM value chain are often not accounted for when determining sustainability. Unsettled Issues in Additive Manufacturing and Improved Sustainability in the Mobility Industry uses a set of scenarios to compare the sustainability of parts made using additive and conventional technologies for both the present and future (2040) states of manufacturing.
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7

Kim, Felix H., and Shawn P. Moylan. Literature review of metal additive manufacturing defects. Gaithersburg, MD: National Institute of Standards and Technology, May 2018. http://dx.doi.org/10.6028/nist.ams.100-16.

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8

Love, Lonnie J., Andrzej Nycz, and Mark W. Noakes. Large Scale Metal Additive Manufacturing with Wolf Robotics. Office of Scientific and Technical Information (OSTI), July 2018. http://dx.doi.org/10.2172/1465067.

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9

Nycz, Andrzej, Mark Noakes, Luke Meyer, Chris Masuo, Derek Vaughan, Lonnie Love, and Mike Walker. Large Scale Metal Additive Manufacturing for Stamping Dies. Office of Scientific and Technical Information (OSTI), August 2022. http://dx.doi.org/10.2172/1883756.

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10

Knapp, Cameron M. Los Alamos National Laboratory’s Approach to Metal Additive Manufacturing. Office of Scientific and Technical Information (OSTI), March 2016. http://dx.doi.org/10.2172/1242923.

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