Relevant bibliographies by topics / Vacuum Casting System

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

Academic literature on the topic 'Vacuum Casting System'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Vacuum Casting System"

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Liu, Y. Y., Z. F. Chi, Q. X. Hu, Y. Yao, and J. Huang. "Vacuum Casting Bubble Automatic Elimination System Based on on-Line Machine Vision Detection." Advanced Materials Research 670 (March 2013): 222–27. http://dx.doi.org/10.4028/www.scientific.net/amr.670.222.

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Bubbles in vacuum casting process are dense, tiny and overlapped. The difference between bubbles and the background is so indistinct that makes bubble detection a great difficulty. Bubble elimination has become the main obstacle in the way of vacuum casting machine’s automation development. Bubble automatic detection is the base of bubble elimination. A machine vision bubble on-line detecting and eliminating platform is constructed, using industrial high-speed CCD camera and professional LED illumination. According to the features of vacuum casting bubbles, the edge pixel ratio algorithm is designed especially for vacuum casting bubble detection. The algorithm is realized using VC++ and Open CV. The integrated system proposed can detect and eliminate vacuum casting bubbles on-line automatically. As it’s confirmed, there is an obviously positive correlation between the edge pixel ratio and the bubble denseness. This detection system makes sense in vacuum casting bubble elimination.
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Huang, Jie, Yuan Yuan Liu, Hai Guang Zhang, Zhao Fu Chi, and Qing Xi Hu. "Vacuum Casting Automatic Control System Based on Configuration Software." Applied Mechanics and Materials 50-51 (February 2011): 249–53. http://dx.doi.org/10.4028/www.scientific.net/amm.50-51.249.

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Bubbles and craft parameters in vacuum casting are the key factors to the quality of products. How to eliminate bubbles and set optimal parameters are the key technical problems to the automation development of vacuum casting. This paper advances a new vacuum casting automatic control system based on configuration software. Dynamic data exchange（DDE） among control module, detection module and execution module is realized based on the strong capability of communication and human-machine interface in configuration software. The realization of this control system can effectively eliminate bubbles and provide corresponding optimal craft parameters automatically and intelligently. In a word, the efficiency and quality of the products can be improved and the dependency of experience parameters can be reduced in vacuum casting.
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Suprapto, Wahyono, Bambang Suharno, Johny Wahyuadi Soedarsono, and Dedi Priadi. "Analytical and Experimental Models of Porosity Formation of Duralumin Cast in Vacuum Casting System." Advanced Materials Research 277 (July 2011): 76–83. http://dx.doi.org/10.4028/www.scientific.net/amr.277.76.

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Porosity in cast metals often leads to cracking of components due to stress concentration and leakage, and as the result, the castings need be repaired or rejected. Disharmony in casting process was resulting in porosity. Prediction of porosity in the casting is necessary as a step to avoid the waste products and reduce costs. But to ensure whether these predictions are accurate and precise, it is still necessary to validate the test trials and testing. This paper aims to provide early information when, where, and how large a defect occurs in particular foundry casting porosity on duralumin. The analytical study of porosity formation based analytic equilibrium wt% of element, the behavior of the thermodynamic, hydrodynamic, and rules of metallurgical on vacuum casting of duralumin. Experiments as a validation study are conducted by duralumin remelting on stainless-steel bowl in a vacuum casting furnace. Analytical simulation and experiments of the casting that has been vacuumed by melting 10 cmHg pressures higher than the pressure solidification, and duralumin melt is poured automatically into permanent mold carbon steel. In the study cast duralumin created five different thicknesses. Both these studies assume the addition of copper (2.5%, 3.0%, 3.5 %, 4.0%, and 4.5% Cu) and vacuum pressure (76, 50, 40, cmHg), as independent variables, while dependent variable in the studies is porosity characteristics, which includes morphology, number and dimensions of the porosity. Optical emission spectrometry test, Reynold's and Niyama numbers, Sievert's law, Archimedes' principle (Pycnometry and Straube-Pfeiffer tests), and Eichenauer equation are instruments which are used to determine the characterization of duralumin casting porosity. Duralumin ingots remelting process was performed by the control pressure (p1) and temperature (T1). Vacuuming process performed after the smelting room temperature reaches 600 °C. Once melted, it followed by duralumin into a permanent mold (p2, T2). As a control parameter is the height of pouring (7 cm), pour temperature and mold temperature respectively at 750 °C and 300 °C. The porosity characteristics studies of two models produce two types of porosity (gas and shrinkage), the quantity dimension and porosity, and distribution of porosity in the cast duralumin.
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Kuo, Chil Chyuan, Min Hsiang Wu, and Ming Yang Lai. "Development of a Low-Cost Automatic Vacuum Degassing System for Rapid Tooling." Applied Mechanics and Materials 459 (October 2013): 349–55. http://dx.doi.org/10.4028/www.scientific.net/amm.459.349.

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Silicone rubber mold is frequently used in the indirect tooling. Automatic vacuum casting system is widely used to degas in the manufacturing of silicone rubber mold, but the cost of hardware is very expensive. A low-cost automatic vacuum degassing system is designed, build and test in this study. Optimized parameters for degassing process are investigated. The saving in the degassing time is about 23.4%.This system offers many advantages such as reducing human error of operator, reducing noise and air pollutions derived from the vacuum pump of the vacuum casting system.
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Zhang, H. G., Q. X. Hu, Y. Y. Liu, D. L. Liu, J. Huang, and Z. F. Chi. "Design and Implementation Full Automatic Intelligent Control System Oriented to Vacuum Casting." Advanced Materials Research 670 (March 2013): 10–21. http://dx.doi.org/10.4028/www.scientific.net/amr.670.10.

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Based on craft features analysis of vacuum casting, this paper concluded that the automation level and control precision of control system are key influencing factors for products quality of vacuum casting. So the purpose of this paper is to resolve these disadvantages of existing control system of vacuum casting equipments. This paper designed a new full automatic intelligent control system which adopts two-level distributed structure. The system is consisted of motor control subsystem, vacuum monitoring and control subsystem, and bubbles detecting and eliminating subsystem. According to the function requirement of control system, this paper described selection and configuration of hardware and function implement of software in detail. Finally, this paper designed and realized a new automatic detecting and eliminating method of bubbles based on vision sensor technology, and presented an intelligent controller model based on Wavelet Neural Network (WNN) for motors. The experimental prototype of vacuum casting has been developed and a large number of experiments have been carrying on. These new controlling algorithms have being tested. The control system integrates vision sensor, intelligent control, microcomputer interface and imaging processing technologies, so it possess high precision, efficiency and flexibility and has a good market application prospect and high economic value. It will be breakthrough for precise rapid tooling.
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Zyska, A., Z. Konopka, M. Łągiewka, and M. Nadolski. "Porosity of Castings Produced by the Vacuum Assisted Pressure Die Casting Method." Archives of Foundry Engineering 15, no. 1 (March 1, 2015): 125–30. http://dx.doi.org/10.1515/afe-2015-0023.

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Abstract The paper presents the results of investigations concerning the influence of negative (relative) pressure in the die cavity of high pressure die casting machine on the porosity of castings made of AlSi9Cu3 alloy. Examinations were carried out for the VertaCast cold chamber vertical pressure die casting machine equipped with a vacuum system. Experiments were performed for three values of the applied gauge pressure: -0.3 bar, -0.5 bar, and -0.7 bar, at constant values of other technological parameters, selected during the formerly carried initial experiments. Porosity of castings was assessed on the basis of microstructure observation and the density measurements performed by the method of hydrostatic weighing. The performed investigation allowed to find out that - for the examined pressure range - the porosity of castings decreases linearly with an increase in the absolute value of negative pressure applied to the die cavity. The negative pressure value of -0.7 bar allows to produce castings exhibiting porosity value less than 1%. Large blowholes arisen probably by occlusion of gaseous phase during the injection of metal into the die cavity, were found in castings produced at the negative pressure value of -0.3 bar. These blowholes are placed mostly in regions of local thermal centres and often accompanied by the discontinuities in the form of interdendritic shrinkage micro-porosity. It was concluded that the high quality AlSi9Cu3 alloy castings able to work in elevated temperatures can be achieved for the absolute value of the negative pressure applied to the die cavity greater than 0.5 bar at the applied set of other parameters of pressure die casting machine work.
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Łągiewka, M., Z. Konopka, M. Nadolski, and A. Zyska. "The Effect of Vacuum Assistance on the Quality of Castings Produced by High Pressure Die Casting Method." Archives of Foundry Engineering 14, no. 2 (June 1, 2014): 23–26. http://dx.doi.org/10.2478/afe-2014-0030.

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Abstract The presented work is aimed to deal with the influence of changes in the value of negative (relative) pressure maintained in the die cavity of pressure die casting machine on the surface quality of pressure castings. The examinations were held by means of the modified Vertacast pressure die casting machine equipped with a vacuum system. Castings were produced for the parameters selected on the basis of previous experiments, i.e. for the plunger velocity in the second stage of injection at the level of 4 m/s, the pouring temperature of the alloy equal to 640°C, and the die temperature of 150°C. The examinations were carried on for three selected values of negative gauge pressure: - 0.03, - 0.05, and - 0.07 MPa. The quality of casting was evaluated by comparing the results of the surface roughness measurements performed for randomly selected castings. The surface roughness was measured by means of Hommel Tester T1000. After a series of measurements it was found that the smoothest surface is exhibited by castings produced at negative gauge pressure value of - 0.07 MPa.
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Wu, Yeongchi, Hector R. Casanova, Kim D. Reisinger, William K. Smith, and Dudley S. Childress. "CIR Casting System for Making Transtibial Sockets." Prosthetics and Orthotics International 33, no. 1 (January 2009): 1–9. http://dx.doi.org/10.1080/03093640802446703.

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This paper describes a new casting system for transtibial socket fabrication. Like the earlier CIR Sand Casting System, the CIR Casting System is based on the ‘dilatancy’ principle that is similar to the packaging process for coffee beans by which loose beans become a solid mass when a vacuum is applied. The main difference from the CIR Sand Casting System is that the CIR Casting System uses light-weight, polystyrene beads in place of silica sand as the primary material for casting the negative mold. The formed negative mold can be converted into a positive sand model for modification and socket formation. With the new plaster-less casting system, the prosthetist can fabricate a transtibial prosthesis in about one hour. It reduces the set-up cost, overall weight and size of the casting system, and increases portability for service in remote areas. The System also creates minimal waste and is energy-conserving and environmentally-friendly.
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Jin, Chul Kyu, Jung Woon Bae, and Chung Gil Kang. "Development of rheology vacuum low-pressure die casting with electromagnetic stirrer and vacuum system." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 228, no. 12 (March 20, 2014): 1599–610. http://dx.doi.org/10.1177/0954405414523591.

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Saidin, Wahab, Noraniah Kassim, Yusri Yusof, and Zainul Ahmad Rajion. "Manufacturing of Removable Complete Dentures Using Vacuum Casting Technique." Applied Mechanics and Materials 120 (October 2011): 32–35. http://dx.doi.org/10.4028/www.scientific.net/amm.120.32.

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This paper presents the research on manufacturing for full denture components. The aim is to develop a new manufacturing procedure for the removal full denture by integrating the techniques used in the Advanced Manufacturing Technology (AMT). The 3D-ATOS scanning system was used to obtain the surface data of the denture teeth sets, the edentulous models and the rims for patient. The surface quality of the digitized images was further refined by using Geomagic Studio 10 and the complete model of the denture components were prepared using Solid Work CAD application tool. A set of library for teeth was developed in the CAD system which includes the reference lines and points for setup and assembly process. The master models of the full denture were produced using MJM rapid prototyping system. The full denture was fabricated using acrylic resin (Vertex Castavaria) material using vacuum casting technique. The finish denture was then tested on patient and found satisfactory with good fitting accuracy as compared to the conventional denture. The use of vacuum casting procedure also has improved about 30% flexural strength as compared to the conventional technique (compression flask).
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Dissertations / Theses on the topic "Vacuum Casting System"

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Dostál, Pavel. "Nové směry v konstrukci a výrobě forem pro voskové odlitky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227940.

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The aim of this work is to compare technology of silicon and aluminium moulds used to make castings using technology of cire perdue with single – piece work. The work itself deals with physical production of silicon mould in vacuum casting system, shaping aluminium mould using CNC machine and subsequent casting of wax models into these moulds. It also handles with physical production of one piece by shaping. It contains background research of the method lost wax casting manufacturing aluminium and silicon moulds and last but not least of Rapid Prototyping technology for producing master model.
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Chih-YangHuang and 黃智揚. "Detachable Vacuum Casting System for Transtibial Stump Duplication." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/87259220048167088691.

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碩士
國立成功大學
機械工程學系
102
Currently, a transtibial socket is manually fabricated by a prosthetist. First step is to capture the stump shape of the amputee by using plaster bandages to produce a plaster stump mold. A complex process to modify the shape of the plaster mold is then followed. This procedure heavily depends on the experiences and skills of the prosthetist and is time-consuming. The modified plaster mold is then used to making a transtibial socket. The original plaster mold should be removed and can’t be reserved after a socket is produced. Based on the concept of reverse engineering and ‘dilatancy’, this research designed and manufactured a vacuum casting system to quickly duplicate the stump mold of an amputee. The casting system includes a detachable two-bag casting tool connected to a vacuum pump. Then combining some emerging technologies to develop a fabrication process of transtibial socket named CAD/3DP process, to ameliorate the shortcoming of the traditional process such as time-consuming and the requirement of plaster modification skills. This improvement can effectively enhance the application of 3D printing technology on the transtibial socket production, and to assist a prosthetist to fabricate stable quality of transtibial prosthetic sockets. Two amputees participated the use of the vacuum casting system and the CAD/3DP process to produce transtibial sockets. The results of socket fits and contact pressures between stump and socket demonstrated that acceptable transtibial sockets can be fabricated by an inexperienced prosthetist.
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Book chapters on the topic "Vacuum Casting System"

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"Fundamentals of Process Control." In Elements of Induction Heating, 143–83. ASM International, 1988. http://dx.doi.org/10.31399/asm.tb.eihdca.t65220143.

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Abstract This chapter discusses the selection, use, and integration of methods to control process variables in induction heating, including control of workpiece and processing temperature and materials handling systems. The discussion of temperature control includes a review of proportional controllers and heat-regulating devices. Integration of control functions is illustrated with examples related to heating of steel slabs, surface hardening of steel parts, vacuum induction melting for casting operations, and process optimization for electric-demand control. Distributed control within larger manufacturing systems is discussed. The chapter also covers nondestructive techniques for process control and methods for process simulation.
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Conference papers on the topic "Vacuum Casting System"

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Robin, Hong, Wang Hongmei, and Hu Ming. "Resin Vacuum Casting System for LED Screen." In 2010 International Conference on Digital Manufacturing and Automation (ICDMA). IEEE, 2010. http://dx.doi.org/10.1109/icdma.2010.58.

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Huang, Jie, Qing Xi Hu, Yuan Yuan Liu, Hai Guang Zhang, Zhao Fu Chi, and Da Li Liu. "The Realization of New Automatic Vacuum Casting System." In 2010 International Conference on Machine Vision and Human-machine Interface. IEEE, 2010. http://dx.doi.org/10.1109/mvhi.2010.34.

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Hailin, Li, Wang Jinhong, and Lin Yong. "Intelligent Control System Design for High Vacuum Die Casting Process." In 2021 International Conference on Intelligent Transportation, Big Data & Smart City (ICITBS). IEEE, 2021. http://dx.doi.org/10.1109/icitbs53129.2021.00081.

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Zhang, Haiguang, Qingxi Hu, Yuanyuan Liu, Jiawei Wang, Zhaofu Chi, and Jie Huang. "On-Line Bubble Inspection Method for Automated Vacuum Casting Controlling System." In 2009 2nd International Congress on Image and Signal Processing (CISP). IEEE, 2009. http://dx.doi.org/10.1109/cisp.2009.5301780.

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Yang, Huai-Sheng, Lai-Shing Shiu, Kuo-Feng Huang, Chieh-Teng Chi, and Hao-Chin Chang. "The Application of Vacuum Casting System for Simplifying the Design of Transtibial Sockets." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10835.

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Prosthetic sockets are one of the most important pieces of equipment for a transtibial amputee to maintain a regular life. Rapid Prototyping is becoming mature and low-cost to fit the CAD system that can conserve the shapes of the stump and socket for reproducing the sockets. If the stump shape can be accurately obtained and the prosthetists’ expertise can be included in a CAD system, then a prosthetic socket will be easily designed by a prosthetist. The stump was scanned to get the shape for the construction and modification of the stump model in a CAD system. However, the stump trembled during the scanning process, the scanner was sensitive about the skin move, so that the scanned data will not exactly represent the real stump shape. This study used a vacuum casting system to gain the stump model instead of creating a positive plaster model in the traditional process of fabricating prosthetic sockets. The stump shape under various vacuum pressures was obtained using a scanning machine and built in a CAD system. The CAD model of the stump will be modified to meet the load-bearing capability of the specific amputee. The use of the vacuum casting method is expected to simplify the design of a socket that will be fabricated by a rapid prototyping machine. Simplifying the designs of transtibial socket can decrease the dependence of human experience and promote the quality and stability of prosthetic sockets.
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Jou, Rong-Yuan. "Numerical Simulations of Filling Flows in Die-Casting Molding of the Thin-Walled LED Heat Sink." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20373.

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In this study, the mold filling analyses of a thin-walled LED heat sink combined with the vacuum valve runner are simulated by FLOW-3D software. Two topics are analyzed and discussed. First, numerical simulations for variety of molding conditions, including effects of thermal conductivity, vacuum pumping pressure, mold temperature, filling velocity, respectively, are conducted for the computational model of the thin-walled LED heat sink connected with the vacuum shut-off valve. Second, effects of several geometrical parameters, including fin thicknesses of the LED heat sink and dimensions of the vacuum shut-off valve are explored. In these two topics, melts are set to liquid metal of Al 384.0 materials. The first topic of analysis mainly to investigate the effects of molding parameters based upon the same computational model of the thin-walled LED heat sink connected with a vacuum valve runner. The simulated results show if molding conditions are changed, different sizes of defects are appeared in castings; if vacuum pumping pressure is higher, the casting is also firmness, density prone to increase; if vacuum pumping pressure is too low, then pumping efficiency of mold cavity is low and it will be easy to form the casting porosity defects. For the second topic of analysis, molding conditions are hold constantly, and effects of different geometrical dimensions to castings qualifications are simulated. Characteristic dimension of trigger mechanism can effectively operate the vacuum shut-off function; but too thin or too thick of channel, it will affect the pumping time if different degrees of vacuum is imposed. Decreasing of gas residuals in castings for the vacuum pumping pressures of 760Torr, 200Torr, 100Torr compared with 10Torr, were 0.311%, 0.174%, 0.008%, respectively. It shows the appropriate and effective vacuum level for vacuum die-casting of the thin-walled LED heat sink is in the range of 100Torr.
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Jung, Seungwook, Kunwoo Lee, and Hoisub Kim. "Development of CAD System for the Fabrication of LCD/VFD Mask From 2D CAD Data." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/dac-1068.

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Abstract In the industry of manufacturing photo mask of Liquid Crystal Display (LCD) or Vacuum Florescent Display (VFD), there have been strong needs for a CAD system of fabricating a pattern mask directly from the CAD data of 2D mask design. This paper presents brief introductions to several algorithms and implementations used in the development of a CAD system for LCD/VFD mask fabrication. For the laser writer, it is simply required to provide the loop information of the pattern shapes. The ray casting algorithm is applied to derive this loop information from the CAD data composed of random vector list. For the photo plotter, the selection of the proper apertures and their plotting paths are derived to expose exact pattern shapes in the shortest time. The idea of Voronoi diagram is used to efficiently obtain an exact aperture path in this study. This paper also features some ideas for automatically detecting and fixing errors of designer’s drawing.
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Ahmadian Namini, P., A. A. Babaluo, M. Akhfash Ardestani, E. Jannatduost, and M. Peyravi. "Fabrication of Multilayer Tubular Nanoporous Ceramic Membranes via Gel-Casting Followed by Dip-Coating." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70256.

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Multilayer tubular nanoporous ceramic membranes were successfully prepared via gel-casting followed by dip-coating. Tubular alumina porous support systems were manufactured by gel-casting method with pore size in the range of 100–600 nm. Interlayer and top-layer were fabricated with appropriate thickness, morphology and pore size distribution via dip-coating of submicron and nano alumina slurries respectively. The effects of the several parameters such as: solid content, dipping time, vacuum pressure, heating rate and number of coated layers on the structural properties of the prepared nanoporous ceramic membranes were studied to get an appropriate pore size and defect-free surface and then the optimum condition was presented. The morphology and surface quality of nanoporous ceramic membranes were investigated by optical microscopy (OM) and thickness of fabricated interlayer and top-layer were examined with scanning electron microscopy (SEM). Mercury porosimeter measurements were performed to determine the open porosity, pore size and pore size distribution (PSD) of nanoporous ceramic membranes.
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Avile´s, F., L. Llanes, A. I. Oliva, J. E. Corona, M. Aguilar-Vega, and M. I. Lori´a-Bastarrachea. "Elasto-Plastic Properties of Thin Gold Films Over Polymeric Substrates." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66319.

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Metallic thin films have been extensively used as coatings, interconnections, sensors and as part of micro and nano-electromechanical devices (MEMS and NEMS). The conventional substrates utilized to deposit those films are normally rigid, such as silicon. However, for applications where the substrate is subjected to significant mechanical strain (e.g. automotive coatings, electronic textiles, bioengineering, etc.) the film-substrate system needs to be flexible and conformable. Compliant polymeric substrates are ideal candidates for such a task. Some interesting mechanical properties not achieved with conventional rigid substrates can be transmitted to the film by the use of polymeric substrates. In this work, mechanical properties of 50 to 300 nm gold films deposited by thermal deposition over two thermoplastic substrates are investigated. A commercial thermoplastic, Polysulfone (“PSF”), and a home-synthesized isophthalic polyester based on the reaction of 4, 4′-(1-hydroxyphenylidene) phenol and isophthaloyl dichloride (“BAP”) [1] were used as raw materials for substrate production. Substrates were selected based on their good mechanical properties and flexibility. The use of two different substrates allows us to investigate the influence of the substrate mechanical properties in the bimaterial response. Substrates of 80 μm thickness were prepared by solution casting and cut to rectangular shapes of nominal dimensions of 30 mm × 5 mm. High purity (99.999%) commercial gold splatters were used for film deposition. Gold films with thickness of 50, 100, 200, and 300 nm were deposited onto PSF substrates by thermal evaporation inside a vacuum chamber at 3×10−5 Torr. Au films with 100 nm thickness were also deposited over BAP substrates. Four replicates of each type were deposited (at the same time) and used for tensile testing. Tensile testing of Au/PSF (film thickness 50–300 nm) and Au/BAP (film thickness 100 nm) specimens was conducted. Tests of the neat PSF and BAP substrates (6 replicates) were also conducted as a baseline. Tensile testing was conducted in a small universal testing machine with a load cell of 200 N and a cross head speed of 0.05 mm/min. The film mechanical properties were extracted from the tensile response of the film/substrate system, considered as a bimaterial. Based on sum of forces and strain compatibility, the film modulus (Ef) and stress (σf) can be extracted from characteristics of the bimaterial (EBim, σBim) and substrate (Es, σs), to generate a stress-strain curve for the film, see e.g. [2], Ef=1Af[ABimEBim−AsEs]=1+tstfEBim−tstfEs(1a)σf=1Af[P−Ps]=1+tstfσBim−tstfσs(1b) where P is the applied load, A = wt is the cross sectional area and sub-index “Bim” corresponds to the film-substrate bimaterial (ABim = w(ts+tf)). Figure 1 shows film stress (σ)-strain (ε) representative curves for Au films with different thicknesses extracted from the Au/PSF bimaterials. The film behavior presents only a small region of plasticity close to the ultimate strain. Thus, the numerical value of the maximum stress (strength) is close to its yield strength. The large plasticity of the substrate may hinder the plasticity of gold when acting as a bimaterial. As observed from this figure, the film modulus, strength and ultimate strain increase as the film thickness decreases, evidencing a “thickness-effect” not observed in bulk materials. Slightly different properties were obtained for the Au films deposited over the BAP substrate, which evidences some substrate-dependency of the film properties.
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Preussner, Brian D., Joseph A. Nenni, and Vondell J. Balls. "An Overview of Risk Management Planning for Hot-Isostatic Pressure Treatment of High-Level Waste Calcine for the Idaho Cleanup Project." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78150.

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The Calcine Disposition Project (CDP) of the Idaho Cleanup Project (ICP) has the responsibility to retrieve, treat, and dispose of the calcine stored at the Idaho Nuclear Technology and Engineering Center (INTEC) located at the Idaho National Laboratory. Calcine is the granular product of thermally treating, or calcining liquid high-level waste (HLW) that was produced at INTEC during the reprocessing of spent nuclear fuel (SNF) to recover uranium. The CDP is currently designing the Hot Isostatic Pressure (HIP) treatment for the calcine to provide monolithic, glass-ceramic waste form suitable for transport and disposition outside of Idaho by 2035 in compliance with the Idaho Settlement Agreement. The HIP process has been used by industry since its invention, by Battelle Institute, in 1955. Hot isostatic pressing can be used for upgrading castings, densifying pre-sintered components, and consolidate powders. It involves the simultaneous application of a high pressure and temperature in a specially constructed vessel. The pressure is applied on all sides with a gas (usually inert) and, so, is isostatic. The CDP will use this treatment process (10,000 psi at 1,150 C) to combine physically and chemically a mixture of calcine and granular additives into a non leachable waste-form. The HIP process for calcine involves filling a metal can with calcine and additives, heating and evacuating the can to remove volatiles, sealing the can under vacuum, and placing the can within the HIP machine for treatment. Although the HIP process has been in use for over 50 years it has not been applied in large scale radioactive service. Challenges with retrofitting such a system for Calcine treatment include 1) filling and sealing the HIP can cleanly and remotely, 2) remotely loading and unloading the HIP machine, and 3) performing maintenance and repair on a 300 ton, hydraulically actuated machine in a highly radioactive hot cell environment. In this article, a systems engineering approach, including use of industry-proven design-for-quality tools and quantitative assessment techniques is summarized. Discussions on how these techniques were used to improve high-consequence risk management and more effectively apply failure mode, RAMI, and time and motion analyses at the earliest possible stages of design are provided.
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Reports on the topic "Vacuum Casting System"

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Shepp, Thomas A. Estimate of Evaporation of Uranium in Vacuum Melt Casting Systems. Office of Scientific and Technical Information (OSTI), May 2011. http://dx.doi.org/10.2172/1117927.

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You might also be interested in the extended bibliographies on the topic 'Vacuum Casting System' for particular source types:
Journal articles
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