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 17 of 17 for “"Metal casting"”.
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Viability of a proposed transparent fluid model for analog metal casting filling process
1 PDF file (viii, 53 pages)
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Multifaced stone and ceramic moulds from Bronze Age Anatolia : building an analytical protocol of mould properties and behavior during the process of metal casting
… the study of multifaceted serpentinite bronze-casting moulds from Bronze Age Anatolia (ca. 3500-1700 B.C.). These moulds represent a class of metal processing tools that reflect material properties and perhaps also social concerns in their development and use. In phase I of the protocol, …
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Design, Fabrication and Testing of Fiber-Reinforced Cellular Structures with Tensegrity Behavior using 3D Printed Sand Molds
… the combination additive manufacturing and metal casting techniques. Tensegrity structures provide high stiffness to mass ratio with all the comprising elements experiencing either tension or compression. This research investigates the possibility of integrating tensegrity behavior with …
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Improving the strength of 3DP parts and development of controlled strength cellular structure investment casting shell
… in creating a 3DP part) for use in investment casting process. The print styles that were created optimized line to line interaction between the printed lines, binder overlap, and the amount of unprinted powder surrounding the printed features. The strength of the parts are measured in three …
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The ceramic technology of bronze-casting molds in ancient China : production practices at three western Zhou foundry sites in the Zhouyuan area
… represent arguably the most sophisticated use of metal casting by any ancient society. These objects were cast by pouring bronze into mold assemblies composed of interlocking sections. To survive the mechanical and thermal rigors of this casting process, the mold sections were constructed from …
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Investigation of manufacturing techniques and prototyping of the Smartcities Citycar frame
… as well as analyzing the compatibility of metal casting, stamping, composite layup, and tube welding, it was resolved that the most effective method of manufacturing the full scale Citycar frame, in the future, will be through tube hydroforming because of the optimization of strength, …
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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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Novelis Teaching Table
<p>Novelis is a company that specializes in metal casting, recycling, and rolling. They primarily focus on aluminum rolling for cans and car bodies but are an industry leader in numerous related areas. As the rolling process is not taught in most general engineering courses, Novelis periodically …
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Part I: In-situ fluorometric quantification of microalgal neutral lipids Part II: Thermal degradation behavior of investment casting polymer patterns
… (SLA) patterns, that are used in investment casting. Density, elastic modulus, expansion coefficient, thermal degradation behavior, etc. were experimentally investigated for their effects on metal casting quality. The reduction in toxic hydrogen cyanide (HCN) generated during thermal …
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Improving heat transfer in spent nuclear fuel disposal packages using metallic void fillers
… and the SNF with a high heat conducting metal is a potential solution. In metal casting, it is well known that a gap forms at the metal-mold interface due to solidification shrinkage and it significantly reduces heat transfer during cooling. This negative heat transfer effect is …
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Design and performance of a compact high-energy computed tomography system for the study of metal solidification
… a computed tomography (CT) sensor useful to the metal casting industry to improve product quality and productivity. X-ray CT allows the non-destructive measurement of the two-dimensional density distribution in a given plane through an object. The solid and liquid phases of aluminum differ in …
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Numerical simulations of die casting with uncertainty quantification and optimization using neural networks
Die casting is one type of metal casting in which liquid metal is solidified in a reusable die. In such a complex process, measuring and controlling the process parameters is difficult. Conventional deterministic simulations are insufficient to completely estimate the effect of stochastic variation …
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Composition and microstructure evolution in semi-solid cast Al-Zn alloys
Semi-solid metal casting produces a low porosity, globular microstructure, which makes it an attractive competitor to wrought parts. This research explores the suitability of utilising heat treatable, Al-Zn-Mg-Cu alloys for the production of high strength parts for the automotive and aerospace …
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Production of metal parts using the three dimensional printing process
… developed to create alumina/silica molds for metal casting. A new process was developed to allow the 3DP system to directly fabricate metal parts. Stainless steel powder was layered in the powder bed and selectively joined by a latex polymer binder. Upon process completion, the powder bed was …
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Root cause analysis of production defects in a foundry using lean tools
… The study is conducted in a large-scale metal casting company, Atlantis Foundries which manufactures cylinder blocks and gear box castings. At present scrap and rework rate of heavy duty, cores exceed set targets; this is a major quality concern for the company. From literature, it is …
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To Enable the Processing of New Complex High Performance Alloys by Improving the Capacity and Performance of Continuous Casting Equipment
… of high quality rods. However, continuous casting has good potential to also be adapted to the mass production of various copper alloy wires. <br/><br/>Comparison of the continuous casting process to other thermal methods such as continuous extrusion highlighted that, in general, the …
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The prediction of bubble defects in castings
… and transport of gas bubbles in solidifying TiAl castings. The candidate has reviewed the literature, programmed in FORTRAN code, and validated a number of competing techniques for two phase flow relevant to the filling of moulds. He has developed a hybrid (Donor-acceptor/ Level Set) method, which …