Dissertations / Theses on the topic 'Metal castings'
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Hosking, Timothy Donald, and mikewood@deakin edu au. "Casting yield improvement in graphitic iron castings." Deakin University. School of Engineering and Technology, 2001. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20051017.122220.
Full textUmaru, Darma Katsina. "Task and need analysis of metal work casting in Katsina State of Nigeria." Online version, 2009. http://www.uwstout.edu/lib/thesis/2009/2009darmak.pdf.
Full textDewhirst, Brian A. "Castability Control in Metal Casting via Fluidity Measures: Application of Error Analysis to Variations in Fluidity Testing." Worcester, Mass. : Worcester Polytechnic Institute, 2008. http://www.wpi.edu/Pubs/ETD/Available/etd-121608-125755/.
Full textKeywords: castability; metal casting; error analysis; casting fluidity; a356; solidification processing; fluidity. Includes bibliographical references (leaves 85-90).
Deez, Brent Steven. "An investigation on the suitability of layer manufacturing methods for rapid tooling development in investment casting of light metal alloys." Thesis, Cape Peninsula University of Technology, 2010. http://hdl.handle.net/20.500.11838/2228.
Full textThe research presented in this report focuses on Investment Casting capabilities for light metal alloys in South Africa and forms part of the Advanced Manufacturing Technology Strategy's (AMTS): Light Weight Metals flagship programme. The research is centred on the suitability of rapid prototyping (RP)/Iayer manufacturing (LM) methods to produce patterns for the investment casting of aluminium (AI), magnesium (Mg) and titanium (Ti) alloys, together known as Rapid Investment Casting. Three core RP technologies are investigated namely: Three Dimensional Printing - Drop-on-Bed from Z-corporation, Three Dimensional Printing - Drop-on- Drop from ThermoJet - 3D Systems and Selective Laser Sintering from EOS. Various RP/LM processes are discussed in detail and highlight the technologies selected in this study. A standard benchmark part, adapted from the European project framework FP6, designed and utilised in similar studies is used as the basis for the research. The Investment Casting process is discussed fully and compared to the Rapid Investment Casting, listing both the advantages and disadvantages of the above mentioned methods. In addition a special study has been conducted on investment casting of large components using layer manufactured patterns. This study not only helped to establish and validate the shrinkage value calculated for the aluminium castings but also showed substantial capability lacks in SA foundries to handle this type of components, which are by definition most often of high added value.
Matys, Paul. "Fluid flow and heat transfer in continuous casting processes." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28504.
Full textApplied Science, Faculty of
Mechanical Engineering, Department of
Graduate
Bernard, William J. "The continuous rheoconversion process Scale-up and optimization." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-082305-102150/.
Full textHugo, Philip. "Suitability of layer manufacturing technologies for rapid tooling development in investment casting." Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/847.
Full textAhmad, Nadiah. "Riser Feeding Evaluation Method for Metal Castings Using Numerical Analysis." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1447845668.
Full textWang, Enhai. "Metal-mold reactions in CMSX-4 single crystal superalloy castings." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1464425.
Full textCharmeux, Jean-Francois. "Capabilities of the Investment Casting process for producing meso/micro metal castings using Rapid Prototyping manufacturing routes." Thesis, Cardiff University, 2007. http://orca.cf.ac.uk/54701/.
Full textFindon, Matthew M. "Semi-solid slurry formation via liquid metal mixing." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0721103-161140/.
Full textTjoa, Robertus Tjin Hok Carleton University Dissertation Engineering Mechanical. "Assessment of the accuracy of a computational casting model." Ottawa, 1992.
Find full textDewhirst, Brian A. "Optimization of the heat treatment of semi solid processed A356 aluminum alloy." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-111705-111503/.
Full textKeywords: microstructure; casting; Fluid Bed; Quality Index; Aluminum; A356; heat treatment; SSM; Semi Solid Metal Includes bibliographical references. (p.105-106)
Hong, Fangjun. "Droplet spreading, substrate remelting and variable thermal contact resistance in microcasting /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?MECH%202005%20HONG.
Full textXue, Xingjian. "IMPROVEMENTS ON HEAT FLUX AND HEAT CONDUCTANCE ESTIMATION WITH APPLICATIONS TO METAL CASTINGS." MSSTATE, 2003. http://sun.library.msstate.edu/ETD-db/theses/available/etd-08042003-091324/.
Full textMajidi, Seyyed Hojjat. "Modeling of air entrainment and oxide inclusion formation during pouring of metal castings." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6611.
Full textLim, Chu-Sing. "The production and evaluation of fibre preform-infiltrated metal matrix composite castings produced by a developed pressure-assisted investment casting process." Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/28175.
Full textAjayi, Frederick Adegbola. "A transient multi-physics algorithm for solidification residual stress in metal components." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287951.
Full textKolar, Venkat Deepak. "Application of reverse engineering and rapid prototyping to casting." Cleveland, Ohio : Cleveland State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1210805699.
Full textAbstract. Title from PDF t.p. (viewed on July 3, 2008). Includes bibliographical references (p.56-57). Available online via the OhioLINK ETD Center. Also available in print.
Winardi, Leonard. "Procedures for predicting pressures inside cores." Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2009r/winardi..pdf.
Full textTitle from PDF of title page (viewed October 13, 2009). Additional advisors: J. Barry Andrews, Gregg M. Janowski, Peter M. Walsh, Srinath Viswanathan, Harry E. Littleton. Includes bibliographical references (p. 207-209).
Bernard, III William J. "The Continuous Rheoconversion Process: Scale-up and Optimization." Digital WPI, 2005. https://digitalcommons.wpi.edu/etd-theses/957.
Full textChen, Qi. "The effect of transition metal additions on double oxide film defects in Al alloy castings." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7404/.
Full textBeshay, Youssef Kamal. "The application of positron emission particle tracking to study non-metallic inclusions in metal castings." Thesis, University of Birmingham, 2010. http://etheses.bham.ac.uk//id/eprint/1327/.
Full textUddin, Salah. "Semi-analytical and numerical modeling of microsegregation for solidifying metallic alloys." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112587.
Full textThe second part of this study was focused on developing a fully numerical microsegregation model. The numerical model built upon a previously proposed phase change model which relied upon a coordinate transformation technique. The model was extended to deal with moving boundaries with solute diffusion. A suitable computational procedure was developed to solve the model equations which are strongly coupled to each other. To verify the accuracy of the present algorithm with regard to the capability of tracking the moving interfaces, analytical solution of the Stefan problem was used for verification purposes. A good agreement between the model predictions and the analytical solution was found. Evolution of concentration fields during solidification was calculated in the growing solid as well as in the shrinking liquid regions for rectangular, cylindrical and spherical dendrite geometries. The effects of various cooling conditions and relevant parametric values on microsegregation were analyzed and discussed.
Warke, Virendra S. "Removal of Hydrogen and Solid Particles from Molten Aluminum Alloys in the Rotating Impeller Degasser: Mathematical Models and Computer Simulations." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0626103-111317.
Full textNyembwe, Kasongo Didier. "Tool manufacturing by metal casting in sand moulds produced by additive manufacturing processes." Thesis, Bloemfontein : Central University of Technology, Free State, 2012. http://hdl.handle.net/11462/162.
Full textIn this study an alternative indirect Rapid Tooling process is proposed. It essentially consists of producing sand moulds by Additive Manufacturing (AM) processes followed by casting of tools in the moulds. Various features of this tool making method have been investigated. A process chain for the proposed tool manufacturing method was conceptually developed. This process chain referred to as Rapid Casting for Tooling (RCT) is made up of five steps including Computer Aided Design (CAD) modeling, casting simulation, AM of moulds, metal casting and finishing operations. A validation stage is also provided to determine the suitability of the tool geometry and material for RCT. The theoretical assessment of the RCT process chain indicated that it has potential benefits such as short manufacturing time, low manufacturing cost and good quality of tools in terms of surface finish and dimensional accuracy. Focusing on the step of AM of the sand moulds, the selection of available AM processes between the Laser Sintering (LS) using an EOSINT S 700 machine and Three Dimensional Printing using a Z-Corporation Spectrum 550 printer was addressed by means of the Analytic Hierarchy Process (AHP). The criteria considered at this stage were manufacturing time, manufacturing cost, surface finish and dimensional accuracy. LS was found to be the most suitable for RCT compared to Three Dimensional Printing. The overall preferences for these two alternatives were respectively calculated at 73% and 27%. LS was then used as the default AM process of sand moulds in the present research work. A practical implementation of RCT to the manufacturing of foundry tooling used a case study provided by a local foundry. It consisted of the production of a sand casting pattern in cast iron for a high pressure moulding machine. The investigation confirmed the feasibility of RCT for producing foundry tools. In addition it demonstrated the crucial role of casting simulation in the prevention of casting defects and the prediction of tool properties. The challenges of RCT were found to be exogenous mainly related to workmanship. An assessment of RCT manufacturing time and cost was conducted using the case study above mentioned as well as an additional one dealing with the manufacturing of an aluminium die for the production of lost wax patterns. Durations and prices of RCT steps were carefully recorded and aggregated. The results indicated that the AM of moulds was the rate determining and cost driving step of RCT if procurement of technology was considered to be a sunk cost. Overall RCT was found to be faster but more expensive than machining and investment casting. Modern surface analyses and scanning techniques were used to assess the quality of RCT tools in terms of surface finish and dimensional accuracy. The best surface finish obtained for the cast dies had Ra and Rz respectively equal to 3.23 μm and 11.38 μm. In terms of dimensional accuracy, 82% of cast die points coincided with die Computer Aided Design (CAD) data which is within the typical tolerances of sand cast products. The investigation also showed that mould coating contributed slightly to the improvement of the cast tool surface finish. Finally this study also found that the additive manufacturing of the sand mould was the chief factor responsible for the loss of dimensional accuracy. Because of the above, it was concluded that light machining will always be required to improve the surface finish and the dimensional accuracy of cast tools. Durability was the last characteristic of RCT tools to be assessed. This property was empirically inferred from the mechanical properties and metallographic analysis of castings. Merit of durability figures of 0.048 to 0.152 were obtained for the cast tools. It was found that tools obtained from Direct Croning (DC) moulds have merit of durability figures three times higher than the tools produced from Z-Cast moulds thus a better resistance to abrasion wear of the former tools compared to the latter.
Moosbrugger, John C. "Numerical computation of metal/mold boundary heat flux in sand castings using a finite element enthalpy model." Thesis, Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/16365.
Full textBainbridge, Ian Frank. "The influence of molten metal surface properties on the formation of surface defects on vertical direct chill cast aluminium alloy products /." [St. Lucia, Qld.], 2005. http://adt.library.uq.edu.au/public/adt-QU20060116.141809/index.html.
Full textSaha, Deepak. "Novel Processing Methods and Mechanisms to Control the Cast Microstructure in Al Based Alloys - 390 and Wrought Alloys." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-041405-150300/.
Full textEntwistle, Jeremy. "Metal casting the fire of art and industry /." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5179.
Full textTitle from document title page. Document formatted into pages; contains iii, 45 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 43).
Papworth, Adam John. "Squeeze-casting of fibre reinforced metal matrix composites." Thesis, University of Liverpool, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364201.
Full textTaylor, John A. "The lost wax casting technique." Virtual Press, 1993. http://liblink.bsu.edu/uhtbin/catkey/864921.
Full textDepartment of Art
Ogbogu, S. O. E. "Electromagnetic stirring in the continuous casting of molten metal." Thesis, University of Bradford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374933.
Full textKayikci, Ramazan. "Metal-mould contact and heat transfer during casting solidification." Thesis, University of Manchester, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681341.
Full textRothén, Niclas, and Jacob Aho. "Semi Solid Metal Casting : Study Of Slurry Preperation Parameters." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Maskinteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-36446.
Full textHeydari, Farhad. "Mechanisms of sand flow and compaction in core-blowing." Thesis, University of Warwick, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357857.
Full textKirma, Turgut. "Production Of Coal Crusher Hammer Heads By Bi-metal Casting." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/2/12609925/index.pdf.
Full textSoderhjelm, Carl. "Multi-Material Metal Casting: Metallurgically Bonding Aluminum to Ferrous Inserts." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-dissertations/174.
Full textSu, Xiuling. "Computer Aided Optimization of an Investment Bi-Metal Casting Process." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin998405696.
Full textGelder, Andrew. "Lithium-aluminium casting alloys and their associated metal-mould reactions." Thesis, Aston University, 1992. http://publications.aston.ac.uk/9775/.
Full textKarantzalis, Alexander E. "Characterisation of AI MMCs manufactured by a flux casting process." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243346.
Full textFORNO, ILARIA. "Investment Casting of Precious Metals: Materials and Methods." Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2502741.
Full textHa, H. U. "Squeeze casting of magnesium-based alloys and their metal matrix composites." Thesis, University of Southampton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383410.
Full textKurtoglu, Aziz. "Aluminum Oxide And Titanium Diboride Reinforced Metal Matrix Composite And Its Mechanical Properties." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605381/index.pdf.
Full textKennedy, Andrew Richard. "The redistribution of reinforcements during the solidification processing of metal matrix composites." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307106.
Full textMertz, Andreas. "The provision of a knowledge base for product assurance for pressure die casting." Thesis, Teesside University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239125.
Full textTrovant, Michael. "A boundary condition coupling strategy for the modeling of metal casting processes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0011/NQ35346.pdf.
Full textCao, Xinjin. "Heat treatment of liquid metal : precipitation and sedimentation processing of liquid Al-11.5Si-0.4Mg alloy." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369168.
Full textEtienne, Caron. "Secondary cooling in the direct-chill casting of light metals." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5237.
Full textMoussa, Nadine. "Multi scale modelling and numerical simulation of metal foam manufacturing process via casting." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC021/document.
Full textThe objective of this work is to elaborate a new manufacturing process of metal foams via casting by modelling the infiltration and solidification of liquid metal inside a porous medium.However, due to the complexity of this problem the study is divided into two steps. First, at local scale one strut of the metal foam is considered as a capillary tube and the infiltration and solidification of liquid metal inside a cylindrical mould is studied. Second, a macroscopic model of diffusive solidification is derived using the volume average method. The local model is coded in an open source CFD tool and three parametric studies were done where the relations between the infiltration length and time as function of the operating parameters are determined. The modelling of the solidification of liquid metal inside a porous medium is simplified by considering that the mould is fully saturated by liquid metal at rest, solidification occurs by pure diffusion. Local thermal equilibrium (LTE) is considered between the solid and liquid phases of the metal while local thermal non equilibrium (LTNE) is retained between the metallic mixture and the mould. The associated closure problems as well as the macroscopic problem were numerically solved