Relevant bibliographies by topics / Electricity welding

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Electricity welding'

Author: Grafiati
Published: 28 May 2022

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Journal articles on the topic "Electricity welding"

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Kuleshkov, Yuriy, Timofey Rudenko, Mykhailo Krasota, and Ruslan Osin. "The Researching of Dynamic Electricity Distribution Along with the Renovation of Automobile Details by the Contact Covering Welding." National Interagency Scientific and Technical Collection of Works. Design, Production and Exploitation of Agricultural Machines, no. 50 (2020): 173–81. http://dx.doi.org/10.32515/2414-3820.2020.50.173-181.

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The goal of completed research is determination of common factors of dynamic electricity distribution in the area of simple welding spot forming due to contact welding-on compact and powdered materials. Due to contact welding-on of compact (rod, belt) and powdered materials there is the dissimilarity of an electric field, which determines the unequal distribution of temperature field in the area of the moulded core creating and influence on the welded on covering quality. By the contact welding-on of compact materials, there is an occurrence of central core zone unheating, which is coming as a result of geometrical, temperature and magnetic-electric factors. During contact welding of metal powders, considering high speed of heating and a small-time of dynamic electricity passage through powder, it is possible to make a conclusion, that the stability of heat generation in a powder surface will be determined by starting electricity resistance value. High-quality plating can be reached if the powder charge will have low and stable electricity resistance in a cross-section and good compactness under the condition of low compress pressure, which is used for welding. (40 ... 70 MPa). Electrical field dissimilarity with contact welding-on powdered materials leads to unequal heating of powdered materials and covering defects, which is taking place due to the features of powder compression. As a result of current lines concoction in the central area is observed at a local temperature increase. Besides, interstices are dielectrical phase and increase electrical resistance in the peripheral areas. To increase the quality of coverings, got by contact welding-on is able due to providing high-quality powder material compression on the whole covering cut.
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Jiang, Jin Yong, Wen Ping Chang, Shi Guo Du, Gui E. Lu, and Jia Qi Huang. "The Design for the Main Reaction System of a New Welding Material." Advanced Materials Research 284-286 (July 2011): 416–19. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.416.

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Gunpowder composite welding rod is a new type of welding material, which can accomplish welding without electricity and gas. In this article, the effect regularities of two types of thermite on the energy densities of gunpowder composite welding rod have been obtained with thermodynamical equilibrium equations. These results are very useful for the design of the main reaction system of this welding material.
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Dai, Wen Jin, and Xiang Jie Chen. "Signal Collection and Analysis on CO2 Arc Welding Based on DSP." Applied Mechanics and Materials 29-32 (August 2010): 997–1002. http://dx.doi.org/10.4028/www.scientific.net/amm.29-32.997.

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On the base for TMS320F2407DSDSP, it can collect the electricity signal from the CO2 arc welding, and pick–up the character parameters for the frequency distributing in the short circuit time and arc welding time. It realizes the real-time inspection by the way for analyzing the dynamic current and voltage, U-I graphic and the character parameter during the welding.
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Cai, Hu, Peng Zhang, and Yuan Xun Wang. "Prediction Control Method of Spot Welded Nugget Size Based on Finite Element Analysis of Thermo-Electricity Transient." Advanced Materials Research 415-417 (December 2011): 151–65. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.151.

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Dual-phase steel is a type of sheet material newly developed to adapt to the lightweight and safety needs of vehicle. In this paper, 1.7 mm thick dual-phase steel DP600 was taken as the object of study, its resistance spot welding performance characteristics and welding mechanism was studied in detail. The thermoelectricity transient process of welding was simulated with the finite element software and the experiment under corresponding welding parameters. It’s found that, under proper current circumstances, the simulated nugget size and the experimental result is in good agreement except the large current, the simulated deformation morphology and experimental result can be consistent, which indicates the good accuracy of analysis on resistance spot welding mechanism of dual-phase steel DP600. According to the results, the specific method and theoretical basis about nugget size and welding deformation predictive control was discussed, created the mutual relations between the resistance spot welding performance characteristics and welding mechanism of dual-phase steel DP600. The study effort has practical significance in comprehensively understanding the resistances spot welding mechanism of dual-phase steel, as well as in application and quality control of duplex steel in automotive body welding.
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Nguyen, Tien Duong. "Study and Fabrication of Virtual TIG Welding Equipment." Applied Mechanics and Materials 842 (June 2016): 288–92. http://dx.doi.org/10.4028/www.scientific.net/amm.842.288.

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The green technology is applied in training welders by using simulation equipment. The virtual tungsten inert gas welding (TIG welding) equipment permits of reducing the cost of welding practice training by saving on materials, electricity. It does not cause the environmental pollution. It is not harmful to welding learners. This paper studies on the permissible range of technological and technical parameters of TIG welding process. This is basis to develop the software in order to evaluate learners on virtual TIG welding equipment. These are foundations to manufacture the virtual TIG welding equipment. This equipment allows welding learners to practice the basic operations and skills as on real TIG welding machine, including the techniques of striking the arc, restarting the arc, maintenance of arc length, controlling of torch angle, filler rod angle, the operations of torch move, filler rod move,... with different welds and different positions
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Wang, Zhong Tang, Shi Hong Zhang, Guang Xia Qi, and Rong Hui Chang. "Tailor-Welded Blanks Manufactured and Stamping Properties of Magnesium Alloy." Advanced Materials Research 148-149 (October 2010): 241–44. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.241.

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Magnesium alloy tailor-welded blanks(MTWBs) of AZ31 and AZ80 sheet had been manufactured by gas tungsten arc welded(GTAW), which the thickness were 0.8mm. The welding properties of Magnesium alloy sheet had been analyzed, and the technology parameters of GTAW were determined by experiment study, which was that welding thread being Φ2.0mm, welding electricity 50A, welding voltage 9V, welding rate 12—13cm/min. The research results presented that the grain in welded seam was isometric crystal, and the grains were branching crystal in heat-affected zone (HAZ). For MTWBs of AZ31and AZ80 sheet which the thickness was 0.8mm, the forming parameters were that the forming temperature of AZ31 being 190-220°C, and forming temperature of AZ80 being 310°C-350°C, and the temperature of tools is 180°C~200°C.
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Oikawa, Masashi, Kentaro Atsumi, Yosuke Otsuka, and Naoki Kawada. "Development of Condition Monitoring System for Electric Resistance Spot Welding Used to Manufacture Railway Car Bodies." Journal of Robotics and Mechatronics 33, no. 2 (April 20, 2021): 421–31. http://dx.doi.org/10.20965/jrm.2021.p0421.

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Stainless steel railway car bodies are assembled by joining the outer plates and the pillar materials using resistance spot welding. In recent years, more and more car bodies are being assembled using laser welding in addition to the resistance spot welding. For this laser welding system, we developed a condition monitoring system considering the processes before and after laser welding as a single system, and obtained and put into practical use an appropriate condition that suppresses spatter generation during laser welding. On the other hand, in resistance spot welding, the current, weld time, electrode load, and electrode tip shape are the main factors that determine the welding quality. Therefore, the configuration of the equipment is less complicated than that of laser welding system, and the condition monitoring is easier than that of the laser welding. In this study, by transferring the concept of the condition monitoring system developed for laser welding to resistance spot welding, we achieved a reduction of more than 60% in terms of electricity consumption and improved the appearance of the car body by optimizing the indentation shape. In addition to this technical achievement, we also present in this paper a case study showing the opportunity for innovation by restructuring the technological paradigm of the resistance spot welding in the production of stainless steel car body shells.
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Ratela, Jefta, Jozua Huwae, Marinus Tappy, Raman Simanjuntak, Lexy Hosang, and Novie Wijaya. "Kekuatan tarik logam hasil pengelasan dengan las listrik dan las LPG." JURNAL BLUEFIN FISHERIES 1, no. 1 (August 8, 2019): 29. http://dx.doi.org/10.15578/jbf.v1i1.2.

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Steel welding, especially soft steel with carbon content ranging from 0.3%, which is installed in the construction of fishing vessels, often using various types of electrodes including kobe steel RB, 26 Niko steel RD 260 Esap steel OK 46,64, Philips steel PH 68 JIS D 4314, AWS E 6013 and others, while LPG Las only uses bait welding from welding wire with a size of 3-5 mm. The purpose of this study is to examine the tensile strength of metal welding results between welds of Electricity with LPG Welding. The variable observed in this study is the amount of tensile strength in two types of electric welding machines and LPG welding. From the data obtained from the test results, then the magnitude of the tensile strength is sought by distributing the results of observations with cross sections of test specimens used in the form of stretch loads, mouth strength, maximum load, maximum tensile strength, broken load and elastic modulus. From the results of the tensile testing performed, it turns out that there is a difference in the welding power of Electric with LPG Gas welding where the electric welding strength is greater than the welding strength of LPG Gas. The electric weld tensile strength is 69.13 Kgf / mm² and LPG Gas welding is 26.20 Kgf / mm²
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He, Bo, and Chang Qing Sun. "Crack Resistance and Structural Analysis on Thermit Welding." Advanced Materials Research 239-242 (May 2011): 2440–43. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.2440.

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War-broken parts can be repaired quickly without electricity and gas in the wild by use of the thermit welding technology, so it is of great significance to study on welded quality of thermit welding parts for its military application. As the crack resistance of welded parts is an important target to estimate the welded performance, crack resistance test and microstructure analysis have been conducted on test specimens made of Q235 welded parts. Results showed that as the crack ratio was less than 20% in the Y-groove crack test, the crack propagation would not occur in the practical welding structure and that the crack resistance of welded joints could meet the welded demand.
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Lazarescu, Grigore Ion, and Cristian Ratiu. "Intra Oral Welding of Titanium Implants 40 Years of Proven Clinical Success." Advanced Materials Research 1138 (July 2016): 172–79. http://dx.doi.org/10.4028/www.scientific.net/amr.1138.172.

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Intra Oral Welding has been used since 1976 to stabilize and re enforces dental implants. Pier Luigi Mondani is the inventor of technique and device that can join titanium parts with no relevant thermal outcome. In dentistry and other medical fields, this technological solution allows a faster and better healing at significantly lower costs. The physical process is a pressure-electricity induced diffusion of joined parts. As dental implants become more and more the main solution for edentulous people, Intraoral Welding is offering better primary implant stability, faster provisional prosthesis solution and functional healing while immediate loading. A number of clinical cases are presented for their original approach with titanium bar welding.
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Dissertations / Theses on the topic "Electricity welding"

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Пагутяк, Михайло Йосипович. "Вдосконалення технології та устаткування для зварювання елементів рами візка вантажопідйомного крана та дослідження властивостей зварних з'єднань." Master's thesis, Пагутяк М.Й, 2018. http://elartu.tntu.edu.ua/handle/lib/24066.

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Дипломна робота присвячена вдосконаленню технології зварювання елементів рами візка вантажопідйомного крана та дослідження властивостей зварних з'єднань. Проведений літературний огляд отримання рамних конструкцій, що працюють при динамічних навантаженнях, здійснено аналіз конструкції рами візка вантажопідйомного крана, характеристики матеріалу виробу та визначено його зварюваність. Обґрунтовано спосіб зварювання. Запропоновано раціональне зварювальне обладнання та розроблено відповідне технологічне оснащення, що дозволять покращити техніко-економічні показники виробництва та якості зварної конструкції. Проведено аналітичні дослідження впливу температурного циклу зварювання на структуру та механічні властивості зварного з’єднання. Результати роботи можуть бути впроваджені у виробництво при виготовленні елементів, що працюють під тиском.
This thesis presents results of improvement of technology and equipment for welding frame elements of trolley of the crane and study of welded joints properties. Literary review of the receipt of frame structures working under dynamic loads, analysis of frame constructions of the trolley cranes been carried out, characteristics of the material of product and its weld ability has been determined. Grounded welding method. The rational welding equipment offered and the appropriate technological equipment developed, which will allow improving the technical and economic parameters of the production and quality of the welded construction. An analytical study of temperature cycle welding effect on the structure and mechanical properties of the welded joints carried out. Results can be implement into production of elements working under pressure.
Вступ, аналітична частина, дослідницька частина, технологічна частина, конструкторська частина, обґрунтування економічної ефективності, спеціальна частина, охорона праці та безпека в надзвичайних ситуаціях, екологія, висновки, додатки.
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Дусанюк, Ж. П., О. П. Шиліна, В. Д. Пріщенко, Ж. П. Дусанюк, Е. П. Шилина, В. Д. Прищенко, Zh P. Dusanyuk, E. P. Shilina, and V. D. Pryshchenko. "Порівняльний аналіз собівартості виготовлення та відновлення деталі "корпус затвору млина"." Thesis, ВНТУ, 2013. http://ir.lib.vntu.edu.ua/handle/123456789/7701.

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В роботі досліджено ефективність відновлення деталі шляхом порівняння собівартості виготовлення нової деталі та собівартості відновлення спрацьованої деталі, вибір оптимального рішення.
В работе исследована эффективность восстановления детали путем сравнения себестоимости изготовления новой детали и себестоимости восстановления изношенной детали, выбор оптимального решения.
In this work the effectiveness of recovery details by comparing the cost of manufacturing new parts and worn parts cost recovery, choice of the optimal solution.
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Books on the topic "Electricity welding"

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Georg, Blauel Johann, Schwalbe K. -H, and European Group on Fracture, eds. The Fracture mechanics of welds: Papers presented at the 12th Plenary Meeting of Task Group I: Elastic - Plastic Fracture Mechanics of the European Group on Fracture held at the Central Electricity Research Laboratories, Leatherhead, UK, on 26 and 27 September 1985. London: Mechanical Engineering Publications Limited, 1987.

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Book chapters on the topic "Electricity welding"

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"Electricity and Magnetism." In The Physics of Welding, 47–76. Elsevier, 1986. http://dx.doi.org/10.1016/b978-0-08-034076-0.50010-4.

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Weman, Klas. "Basics of electricity in welding." In Welding Processes Handbook, 19–29. Elsevier, 2012. http://dx.doi.org/10.1533/9780857095183.19.

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Olajide Olorunnisola, Abel. "Potentials of Wood, Bamboo and Natural Fibre-Reinforced Composite Products as Substitute Materials for Fabricating Affordable Agricultural Equipment and Processing Machines in Africa." In Technology in Agriculture. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98265.

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Modern agriculture depends heavily on technology. Land clearing, irrigation, drainage, crop storage and processing all require technological input. By modernising her agriculture, through wise application of science and technology, Africa can make significant headway in economic growth. However, an agricultural technology that is too sophisticated for a particular country/region is beyond its absorptive capacity. Hence, to achieve the objectives of agricultural mechanisation in Africa, it is imperative to take into account prevailing socio-economic conditions and the level of mechanisation necessary for optimal productivity. One major constraint to agricultural mechanisation in sub-Saharan Africa is the relatively high cost of imported metallic machine and equipment fabrication materials. Taking full advantage of substitute non-metallic materials may lower the cost of production and concomitantly empower rural fabricators with limited access to electricity and welding facilities to engage in local manufacturing of sundry agricultural machines and equipment. This Chapter presents illustrative examples of full and partial substitution of metallic with non-metallic materials in the fabrication of affordable machines and equipment for agricultural production, agro-processing, irrigation and drainage, crop drying and storage. Ways of addressing identified critical challenges of technology diffusion are also discussed.
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Reckson, Lindsay V. "Touching a Button." In Realist Ecstasy, 157–97. NYU Press, 2020. http://dx.doi.org/10.18574/nyu/9781479803323.003.0005.

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This chapter examines turn-of-the-century electrification as a site of ecstatic possibility and violent materialization, analyzing little-known photographs by William Van der Weyde of the electric chair at Sing Sing Prison to describe how the electric chair mobilized electricity’s spiritual potential for the mass reproduction of death. Exploring how William Dean Howells and other opponents of the chair linked its technological effects to the mass popularity of the push-button photograph, the chapter examines photography’s collusion with the electric chair’s production of stillness as a form of racial terror, while analyzing Van der Weyde’s photographs as realist reenactments of an electrified touch. The chapter reads these photographs alongside James Weldon Johnson’s The Autobiography of an Ex-Colored Man (1912), a text that mobilizes “electric affects” to theorize the circulations of religious feeling and racial terror at the nadir of American race relations, even as the novel itself becomes an electrifying performance circulating in and through the shock of spectacular violence. Yoking the “electrifying climax” of the camp meeting to the “electric current” of the lynch mob, Johnson channels the language of circuitry to suggest the centrality of both practices in defining and disfiguring the “real” of secular modernity.
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Conference papers on the topic "Electricity welding"

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Zhou, J., L. Y. Sun, and W. X. Wang. "TRANSPORT PHENOMENA IN ELECTRICITY-ASSISTED FRICTION STIR WELDING." In Second Thermal and Fluids Engineering Conference. Connecticut: Begellhouse, 2017. http://dx.doi.org/10.1615/tfec2017.fnt.017773.

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Hongxia, You, Li Yueyue, Su Hainan, Zhang Junyi, Li Lijun, and Bai Xue. "Analysis of transformer tangled winding joints open welding accident." In 2016 China International Conference on Electricity Distribution (CICED). IEEE, 2016. http://dx.doi.org/10.1109/ciced.2016.7576016.

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Liu, Xun, Shuhuai Lan, Xianli Qiao, and Jun Ni. "Study of Plunge Stage for a Hybrid Friction Stir Welding Process Based on Electro-Plastic Effect." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9457.

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In this study, an electrically assisted friction stir welding (FSW) system has been designed and developed. Additional electrodes are assembled and stay in the close proximity of the tool as the tool translates along the weldline. Plunge stage of FSW process has been studied for both aluminum alloy Al 6061 and TRIP 780 steel based on this developed experimental configuration. An effective axial force reduction can be consistently observed after application of a continuous current. In order to compare the relative significance of the associated resistance thermal effect, the workpiece has been preheated to approximately same temperature and it can be shown that around 2/3 of the force reduction can be contributed to the electricity itself. Microstructure of the cross sections for Al 6061 plunge specimens indicated an enhanced dynamic recrystallization process under the influence of current. This phenomenon was not obvious on steel, which is probably due to the higher Joule heating temperature and consequently accelerated grain growth. On the other hand, thermal mechanically affected zone of steel suggested a retarded martensitic phase transformation with electrical current applied.
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Thauvin, Damien, Marcel Tortolano, and Jacques Guillet. "Repairability of Underclad Cracks in the Main Vessel and of BMI Leakages Using Robots." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93827.

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The increase in the authorized lifetime of nuclear power plants and the subsequent ageing of the main primary system require a new maintenance strategy. The R&D division of the French electricity company EDF is working on robotized repairing feasibility. This approach can be more relevant than the replacement of components or the development of dedicated machines for costs, delays, dosimetry. EDF R&D has engaged two anticipating studies of feasibility demonstrations: repair of underclad cracks in the main vessel and repair of the Bottom Mounted Instrument penetration (BMI). The repair of underclad cracks in the main vessel is composed of different processes including machining and welding. The main work carried out in 2005 was on the welding procedure and on the mechanical and metallurgical substantiation of this repair. Robotized machining tests have also been done. A complete repair demonstration will be performed on a mock-up in 2006. The BMI leakages reparation consists of making a weld overlay between the penetration tube and the vessel external surface. The project aims at minimizing the number of adjoining guiding tubes that will have to be removed, and at using a robot and tools able to directly operate on all the BMI.
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Lagerstro¨m, Gunnar, and Max Xie. "High Performance and Cost Effective Recuperator for Micro-Gas Turbines." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30402.

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Rekuperator Svenska AB owned by VOLVO Technology Transfer Corporation and Avesta Polarit, has successfully developed a completely laser welded recuperator for micro-gas turbine applications. Tests have shown that the thermal performance is very competitive. The recuperator was installed in a 100 kW(e) micro-gas turbine power plant for combined electricity and heat generation by a customer. The recuperator is a primary surface counter flow heat exchanger with cross corrugated duct configuration. The primary heat transfer surface plate patterns are stamped and a pair of the plates are laser welded to form an air cell. The air cells are then stacked and laser welded together to form the recuperator core which is tied between two end beams. Manifolds for air inlet and outlet as well as piping system are welded to the core. Through varying the number of air cells the recuperator core can easily be adapted for micro-gas turbine applications with different output rates of electrical power. The key manufacturing technologies are stamping of the air cell plates and laser welding of the air cells. These processes can be fully automated for mass production at low costs.
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Lückemeyer, N., H. Kirchner, and H. Almstedt. "Challenges in Advanced-USC Steam Turbine Design for 1300°F / 700°C." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69822.

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With global warming being one of mankind’s greatest challenges together with, an increasing demand for electricity world-wide, and studies showing that fossil resources like coal and gas will remain a major source for electricity for the next couple of decades, research into the development of highest efficiency fossil power plants has become a top priority. Calculations for coal fired power plants have shown that by increasing the live steam parameters to 700°C and 350bar CO2 emissions can be reduced by as much as 8% compared to the current state-of-the-art. This is equivalent to a reduction of 24% compared to the current steam power plant fleet within the European Union. To achieve the desired operating hours at this temperature the application of nickel (Ni) based alloys for the main steam turbine components such as rotors, inner casings and valves is necessary. The use of Nickel base alloys for selected gas turbine components is common practice. But with steam turbine rotors being solid, 1000mm in diameter and casings with wall thicknesses >100mm the gas turbine application range and experience for nickel base alloys are well exceeded. This paper discusses a basic product design concept in order to identify the core challenges in developing Ni based steam turbine components. These include casting, forging, non-destructive testing and welding. The material property requirements for such components (steam-oxidation resistance, creep and fatigue resistance) are also identified. Based on these challenges and requirements a number of research projects have been carried out in Europe which have selected Alloy617 as being most suitable for forged components and Alloy625 for cast components. Further projects are currently being initiated. The last major step in steam turbine development for high temperatures was to switch from low alloyed chromium (Cr) steels to high alloyed Cr steels. The identified challenges in using Nickel base alloys for large steam turbines are compared to this last material switch to characterize the level of complexity and difficulty of the development of the 700°C steam turbine technology.
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Delaunay, Bastien, Marcel Tortolano, and Jacques Guillet. "Demonstration Results of the Robotized Repair of Underclad Cracks in the Main Vessel." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26333.

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The increase in nuclear power plants lifetime is a major issue for EDF. But the subsequent ageing of main components requires new maintenance strategy development especially for the reactor pressure vessel. The R&D division of the French electricity company EDF is working on robotized repairing feasibility. This approach can be more relevant than the replacement of components or the development of dedicated machines for costs, delays and dosimetry reasons. In this context, EDF R&D has engaged a feasibility demonstration of robotized controls and repairs of underclad cracks in this vessel. Stable underclad cracks in the main vessel have been known for many years. Anticipating the ageing of components, EDF R&D is currently running a full repairing feasibility demonstration. The complete repair consists in installing a robot dedicated to the carrying out of the following processes: • Precise localization of the defects using UT testing, • Elimination of the defects by high speed machining, • Control that the defects were eliminated using penetrant testing, • Geometry recording of the removed volume by laser scanning, • Weld metal refilling of the cavity with TIG tempered bead process, • UT control of the repair. Two main repairing strategies have been developed. The first one consisted in removing the defect without refilling. This option simplifies the repairing operation but requires extra justifications on corrosion created by the contact between carbon steel and primary circuit water. The second option with all the processes developed above provides a complete protection against corrosion but presents specific issues mainly coming from welding without pre and post heat-treatment. The welding procedure and the mechanical and metallurgical substantiation of the complete repair have been developed in 2005. The main work carried out in 2006 consisted in developing high speed machining and UT control procedures and in measuring some mechanical parameters resulting from this repair. The complete repair demonstration including all of the complementary processes (positioning and localization of the arm at the beginning of the repair, penetrant testing, video inspections, laser scanning) was performed on a mock-up at the beginning of 2007.
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Shibli, Ahmed. "Performance of Modern High Strength Steels (P91, P92) in High Temperature Plant." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/creep2007-26058.

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Steels such as P91 and P92 (9Cr martensitic steels) with higher creep strength were initially developed for use in the newer ultra supercritical power plants at temperatures above about 1050°F (570°C). However, soon these steels became popular materials as replacement components for conventional power plant and for HRSGs (Heat Recovery Steam Generators) operating at relatively lower temperatures. The main attraction was in terms of their lower weight per unit volume thus reducing construction, transportation and welding costs. Furthermore, due to privatization and restructuring of the electricity industry many of the existing power plants are now required to operate in cycling mode and this requires the use of materials with high resistance to thermal fatigue. Here high strength steels offer an additional benefit in that the lower section thickness reduces the level of through wall temperature gradients in thick section components. Because of this envisaged additional benefit a number of operators/owners of the existing plant have been replacing some of the ageing components in their plant with those made from these higher strength steels. For the HRSGs, there is a requirement to produce more compact units and here the higher strength steels are used to make smaller size components. This paper discusses these issues and the perceived benefits with the actual plant and more recent R&D experience. It further refers to the potential future techniques for damage detection and life estimation.
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9

Qiu, Songgang, and Ross Galbraith. "Material Compatibility Study for Thermal Energy Storage Containment Structure With Phase Change Material." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66634.

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A desirable feature of concentrated solar power system is to provide electricity in a dispatchable manner during cloud transients and non-daylight hours. A Dish-Stirling concentrating solar power prototype demonstration system was built to incorporate a thermal energy storage (TES) module containing a phase-change material between the solar thermal receiver and the Stirling engine. This paper presents the results of a material compatibility study conducted to determine the suitability of two different metal alloys for use in the construction of the TES module. Key requirements of the materials include strength and corrosion resistance at elevated temperatures, commercial availability, and manufacturability using common fabrication methods. The TES module contains a NaCl/NaF eutectic salt, at temperatures ranging from local ambient to 700°C, where the salt is slightly superheated above its melt temperature. Sample containers made from SS316L and Inconel 625 were fabricated and thoroughly cleaned for compatibility studies based on an extensive literature review. Both the containers and the salt constituents were subjected to a bake-out cycle to drive off moisture, and permit outgassing of contaminants. The containers were filled with salt in a controlled-atmosphere glove box. Filled containers were crimped and sealed by electron-beam welding. The finished samples were placed in a furnace, heated, and held at 750°C. One of each sample container material was removed from the furnace at both 100 and 2500 hours. The containers were cut open to analyze and evaluate the material surface and cross-section. After 100 hours, both SS316L and Inconel 625 exhibited a very small amount of corrosion. The stainless steel suffered a shallow inter-granular grain boundary attack, on the order of 1–2 mm in depth. The Inconel 625 surface formed an oxide complex, which is resistant to dissolution into the molten salt. After 2500 hours, the surface morphology for both materials was largely unchanged, with the corrosion process having switched from an initial localized pattern, to a more uniform pattern. The corrosion depth measured at 2500 hours remained near 1–2 mm, suggesting that the corrosion rate decelerated. Both materials showed promise for compatibility with the chosen salt.
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10

Fukushima, Yoshio, and Masataka Kosaka. "Experimental Investigation of Plastic Injection Molding Heating System Using Hydrogen Absorbing Alloys." In JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/lemp2020-8580.

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Abstract Much focus from various fields is being placed on the hydrogen and utilizing the technique. Nowadays, the applied researches of hydrogen energy have been trying as one of an alternative energy source for fossil fuel. And, since we could not think lightly of consumed energy by machine tools and industrial machinery, Eco-friendly manufacturing is going to be achieved by hydrogen energy. In this study, to prevent the weldline that is a representative defect in the field of plastic injection molding, heat & cool technology using hydrogen energy, LmNi4.90Mn0.10 hydride, is applied to the mold. This method can achieve heat & cool technology by using only hydrogen energy. So, since electricity and warm/cool water that are for heating/cooling the mold are not necessary, this method should thus be at an engineering advantage in terms of eco-friendly manufacturing. After manufacturing the hydrogen-used-prototype-mold that is dedicated to preventing the weldline, the comparison between the experimental data and numerical simulation was carried out. As result, using this approach, the mold surface temperature difference from initial temperature was rapidly increasing to 40 K, in 18 seconds from the beginning of hydrogen-absorbing and the maximum temperature difference ΔT in this experiment has become 48 K.
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