Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 874 for “"Casting"”.
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Casting the void
… incite activity. Density is cast. The process of casting becomes the methodology both for analyzing the void and bringing a density to it.
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A model for casting polyesters
… a mathematical curing model was proposed for the casting operation of these plastics. Temperature distribution through the thickness of the polymer mass was obtained by monitoring thermocouples placed at known locations with the aid of PDP-11/40 computer. Both isothermal and dynamic techniques of …
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The mechanisms of mold filling and casting defect formation in the lost foam casting process
… through the refractory coating in the lost foam casting process. These tests have led to a refinement of current physical models for mold filling and provide additional insight into the formation of casting defects in the process.</p> <p>In Paper 1, castings were poured over a wide range of …
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Towards inert cores for investment casting
… yttrium and lanthanum in the blade alloy. During casting these reactive elements are easily lost from the alloy by reaction with both the core and shell of the mould. This study tests several candidate core formulations for their ability to retain reactive element levels in the alloy after …
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Modeling the continuous casting of steel
… state of continuously cast steels in the casting mold. The model includes the mold in the analysis so that it fully accounts for the effects of mold distortion on the gap formed between the mold and the solidifying strand. It is solved iteratively so that the computed effect of the gap on …
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Numerical simulation of the casting process
… modelling techniques provide a means by which casting design and process parameters can be optimized with minimum use of prototypes. This thesis reviews the current state of the art in solidification modelling. A typical casting problem is modelled, and the numerical results compared against …
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Liquid metal flows in continuous casting molds
Der Effekt eines externen Magnetfeldes auf die mehrphasige und turbulente Strömung in Stranggußkokillen und deren Wechelspiel führt in den wissenschaftlichen Arbeiten zu widersprüchlichen Aussagen. Die verschiedenen Prozessparameter können innerhalb eines kleinen Varianzbereichs entscheidenden …
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Heat and Fluid Flow in Machine Casting
Made available in DSpace on 2014-12-13T19:55:27Z (GMT). No. of bitstreams: 1 7820969.pdf: 3816336 bytes, checksum: 666a6a1b3800e791ac2e7cde802e6c6f (MD5) Previous issue date: 1978
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Casting a one-lunger Atlantic marine engine
… turn of the 20th century. Discussion of proper casting practices and terminology in addition to theory of sand types, machinability, engine cycles, and ignition systems. In depth descriptions of basic and advanced casting processes using the ignitor body and piston as examples.
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HEAT TRANSFER IN SQUEEZE CASTING OF LIGHT ALLOYS
… This study was aimed to develop a solution for casting high strength wrought aluminum alloys and magnesium alloys. Some critical process parameters need to be precisely pre-determined. The interfacial heat transfer coefficient is one of the most important factor. At beginning of this study, an …
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The fluid dynamics of pressure die casting processes
… the study of the whole process of pressure die casting. The necessity of reclassification against the traditional 'three-stage' description is introduced in order to build a new basic tenet in constructing theoretical and practical investigations, which leads to the creation of fluid dynamic …
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Multiphysics modeling of the steel continuous casting process
… macroscale, multiphysics model of the continuous casting of steel. The complete model accounts for the turbulent flow and nonuniform distribution of superheat in the molten steel, the elastic-viscoplastic thermal shrinkage of the solidifying shell, the heat transfer through the shell-mold …
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The industrial ecology of the iron casting industry
Metal casting is an energy and materials intensive manufacturing process, which is an important U.S. industry. This study analyzes iron casting, in particular, for possible improvements that will result in greater efficiencies and therefore greater global competitiveness. The quantity and types of …
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Failure Analysis and Casting a Gooseneck for Mashnee
… geometry, and the subsequent patternmaking, sandcasting, and finish machine was completed.
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Taipei terminal rail station : casting an urban gateway
Access is a key issue in the design of railway stations. The evolution of the train station typology, has resulted in many types of stations based on the development of the stations' access. Since rail travel on a larger scale is a system of access between cities, it is important to look at the …
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Detection of Floating Grains in DC Aluminum Casting
… macrosegregation in direct-chill (DC) aluminum castings. The presence of these grains in the sump of a solidifying ingot has been acknowledged based on measurements of cast microstructures and by recent work using a turbulent jet to suspend solute-poor grains and minimize macrosegregation.1,2 …
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Inclusion behaviour in the liquid core during continuous casting.
… developed in the sump of a steel continuous casting machine and the influences these have on the behaviour of inclusions. An experimental method has been devised to simulate the behaviour of inclusions in the sump and to study the apportionment of the input flux of inclusions between the …
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