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Rozprawy doktorskie na temat „Alloy casting”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 6 września 2023

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1

Trejo, Eduardo. "Centrifugal casting of an aluminium alloy." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/3041/.

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In centrifugal casting, molten metal is introduced into a mould which is rotated at high speed. The centrifugal force helps to fill thin sections but this benefit may be offset by the effect of the turbulent flow on the casting quality. In this research, the effect of direct and indirect gated mould designs on the quality and reliability of aluminium alloy investment castings made by centrifugal casting was investigated. The scatter in the ultimate bend strength and the modulus of elasticity was analyzed using the Weibull statistical technique, which showed that the Weibull modulus of both pro

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2

Manson-Whitton, Chris. "Squeeze casting of a conventionally wrought aluminium alloy." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403577.

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3

Gradwell, K. I. "Precipitation in a high strength magnesium casting alloy." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492848.

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4

Tantipaibulvut, Chairath. "An evaluation of the production of magnesium base alloy castings by the expendable pattern casting process." Thesis, Loughborough University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250959.

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5

Spataro, Mark Paul. "Comparison of mechanical performance between magnesium alloy sand castings and high pressure die castings /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18378.pdf.

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6

Smillie, Matthew John. "Casting and Analysis of Squeeze Cast Aluminium Silicon Eutectic Alloy." Thesis, University of Canterbury. Mechanical Engineering, 2006. http://hdl.handle.net/10092/1086.

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Squeeze casting is the practise of solidifying metals under mechanically applied pressure via a slow displacement of a die volume. It has been shown that squeeze casting enhances the mechanical properties of cast metals. Research into other high integrity casting processes has shown that using techniques that enhance melt quality can further increase the mechanical properties. Therefore a bottom-tapped, bottom-fed squeeze casting machine was designed and built around a pre-existing squeeze casting die designed for uniaxial pressure application. This was used to obtain quantitative metallurgica

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7

Butler, Simon Andrew. "The development of a reliable high strength aluminium casting alloy." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.570853.

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An investigation was carried out into the variability of tensile properties of A201 aluminium alloy investment castings. Fracture surfaces and microstructures of tensile specimens were examined by scanning electron and light microscopy. Chemical analysis of phases was carried out using energy dispersive x-ray analysis. Casting composition variations were measured using spark emission spectroscopy. The main factors that contributed to the variation of properties were incipient grain boundary melting during heat treatment, the macro segregation of chemical alloying elements and interdendritic po

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8

Albonetti, Rob. "Porosity and intermetallic formation in lost foam casting of 356 alloy." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/MQ58012.pdf.

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9

Gorsky, Daniel A. "Niyama Based Taper Optimizations in Steel Alloy Castings." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1316191746.

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10

Mezger, Peter Richard. "Corrosion behaviour of dental casting alloys some palladium-containing alloy developments : een wetenschappelijke proeve op het gebied van de geneeskunde en tandheelkunde /." Nijmegen : Katholieke Universiteit te Nijmegen, 1989. http://catalog.hathitrust.org/api/volumes/oclc/38087336.html.

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11

Parmar, Baljit Singh. "The preparation and properties of nanocrystalline soft magnetic materials." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284381.

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12

Yakoub, M. M. "Squeeze casting of zinc-aluminium (ZA) alloys and ZA-27/SiC composites." Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/25378.

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Engineering applications of the recently developed zinc-aluminium casting alloys have been restricted due to certain inherent disadvantages such as segregation. However, segregation can be overcome by thorough mh:!ng of the melt and close temperature control or by rapid solidification of the melt, which can be achieved by squeeze casting. A more serious problem exists in service if components are subjected to a modest temperature increase to about 80°C, when there is a drastic loss of strength. It was therefore thought that the incorporation of ceramic fibres in the matrix could improve the pr

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13

Bayandorian, Iman. "Magnesium alloy strip produced by a melt-conditioned twin roll casting process." Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/4506.

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Twin roll casting (TRC) offers a promising route for the economic production of Mg sheet, but unfortunately, it produces strip with coarse and non-uniform microstructures and severe centre line segregation. Recently, a novel magnesium strip casting process termed melt conditioned twin roll casting (MC-TRC) was developed that, compared with the conventional TRC process, emphasizes solidification control at the casting stage rather than hot rolling. This was achieved by melt conditioning under intensive forced convection prior to twin roll casting resulting in enhanced heterogeneous nucleation f

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14

Trosch, Tanja [Verfasser]. "Development of a Platinum Casting Alloy for Jewelry and Watchmaking / Tanja Trosch." Aachen : Shaker, 2018. http://d-nb.info/1188550594/34.

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15

Wei, Xiaodan. "Thermal mechanical analysis of interfacial behavior in aluminum alloy wheel casting process." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46024.

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The focus of this project is to improve the understanding of the interfacial heat transfer behavior within the Low-Pressure Die Casting (LPDC) process, which is the main manufacturing process for A356 aluminum alloy wheels, and to develop an improved methodology/expression for calculating the heat transfer across the wheel/die interface. To formulate and assess expressions for the interfacial behavior, a 2D-axisymmetric coupled thermo-mechanical model has been developed in the commercial finite element package, ABAQUS. The model was capable of predicting the thermal history, deformation and

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16

Miehe, Anja. "Numerical investigation of horizontal twin-roll casting of the magnesium alloy AZ31." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2014. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-149625.

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The horizontal twin-roll casting (TRC) process is an energy saving and cost-efficient method for producing near-net-shape sheets of castable metals for light-weight production. In order to investigate the TRC process numerically, a code is generated in OpenFOAM and the commercial software STAR-CCM+ is used. Both are validated with the Stefan problem, the gallium melting test case, and a continuous casting experiment for magnesium AZ31. Different solidification models are tested that are similar to solution domain definitions and solid-fraction temperature relations. The comparison with tempera

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17

Cao, 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.

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Duan, Jianglan. "Development of a numerical optimization methodology for the aluminum alloy wheel casting process." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57699.

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Aluminum alloy wheel manufacturers face on-going challenges to produce high quality wheels and increase production rates. Improvements are generally realized by modifying the wheel and die designs and continually improving the manufacturing processes. Conventionally, these improvements have been realized by trial-and-error, building on past practice or experience. This approach typically results in long design lead times, high scrap rates and less than optimal production rates. The work presented in this study seeks to reduce the reliance on trial-and-error techniques by developing a new metho

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19

Kavanagh, Alan. "Study of improved casting methods for the manufacture of medical grade cobalt alloy." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7488/.

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Within many foundries, poor mould design and casting methods result in high levels of process variability, poor metal yield, scrap and inefficiencies leading to overall sub-optimal performance. The aim of this project was to try to try to address main problem areas through an alternate casting method (1-tree casting) used for the manufacture of ASTM F-75 cobalt chrome (Co-Cr) biomedical castings. The mould filling of various runner systems was assessed using real-time X-ray imaging and computational modelling. Mechanical testing, CT-scanning and metallurgical inspection of as-cast and heat-tre

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20

Fourie, Jecois. "Numerical optimisation of the gating system of a titanium alloy inlet valve casting." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/1290.

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Dissertation submitted in fulfilment of the requirements for the degree Master of Technology: Mechanical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology 2014<br>The research described in this dissertation investigates the feasibility of casting inlet valves for an internal combustion engine using Ti6Al4V alloy. The engine valves operate in an extreme environment under high thermal cycles – this requires a material that can withstand such exposures. Ti6Al4V is the most common titanium alloy with high temperature creep and fatigue resistant behavi

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21

Venkatasamy, Vasanth Kumar. "Analysis of in-cavity thermal and pressure characteristics in aluminum alloy die casting." Connect to this title online, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1100721824.

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22

Shilvock, W. D. "The effect of alloy and impurity variation on the treatment, casting and physical properties of aluminium-silicon eutectic alloys." Thesis, University of Canterbury. Engineering, 1995. http://hdl.handle.net/10092/8133.

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The aluminium-silicon eutectic alloy finds widespread use in commercial light alloy foundries world-wide. The intrinsic characteristics which ensure that this traditional alloy continues in use are excellent fluidity, moderate strength, good ductility, low shrinkage, no requirement for post casting heat treatment and exceptional corrosion resistance. The latter two are particularly noteworthy as they assure the eutectic alloy finds favour in numerous roles for which the higher strength Al-7%Si-Mg alloy is less well suited. The research reported in this thesis aimed to quantify the changes in

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23

Dewhirst, 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/.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: microstructure; casting; Fluid Bed; Quality Index; Aluminum; A356; heat treatment; SSM; Semi Solid Metal Includes bibliographical references. (p.105-106)

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24

Papai, Jonathan Pearson. "Contact heat transfer coefficients in aluminum alloy die casting: an experimental and numerical investigation/." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu148784937729536.

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25

Serrano, Munoz Itziar. "Influence of casting defects on the fatigue behaviour of an A357-T6 aerospace alloy." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0117/document.

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L’excellente coulabilité, les coûts de production relativement bas, et ratio poids/résistance mécanique élevé des alliages de fonderie Al-Si-Mg en font une des solutions les plus intéressantes dans le secteur automobile ainsi que dans le domaine aérospatial. Toutefois, il est bien connu que la durée de vie de ces composants moulés à grand nombre de cycles (105 < Nf < 107 cycles) est sévèrement réduite lorsque des défauts de fonderie (notamment pores et oxydes) sont débouchants et/ou subsurfaciques sont présents. Ces défauts concentrent les contraintes et peuvent considérablement réduire

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26

Rivero, Paz Ive. "The effect of key microstructure features on the machining of an aluminum-silicon casting alloy /." View online, 2010. http://ecommons.txstate.edu/engttad/1.

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Agarwal, Pratik, and Pallav Sahu. "Microstructure and Properties Of Az91 Magnesium Alloy." Thesis, 2015. http://ethesis.nitrkl.ac.in/7803/1/2015_BT_microstructure_Agarwal.pdf.

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Magnesium is the lightest structural metal present on Earths surface. With a density of 1.74g/cc, it gives a high strength to weight ratio. This has made it very useful for many applications like automobile, aeronautical etc. Magnesium has many limitations and because of which it cannot be used directly as a replacement of steel and aluminium. Many alloys of magnesium have been developed to partially or completely overcome the limitations of magnesium without sacrificing other properties. One of the most commonly used commercial alloys is magnesium alloy AZ91, which gives better properties tha

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28

Kesavan, Arjun Rajiv. "Microstructure and creep properties of MRI230D magnesium alloy." Thesis, 2014. http://ethesis.nitrkl.ac.in/6368/1/e-38.pdf.

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The dependency of creep behaviour on the as-cast microstructure of MRI230D Mg alloy produced by ingot casting (permanent mould casting) and high pressure die casting was investigated. A detailed microstructural characterisation and study of creep properties have been accomplished. The alloy in both ingot-casting (IC) and high pressure die-casting (HPDC) conditions consists of á-Mg, C36 ((Mg,Al)2Ca) and Al-Mn rich phases. Microstructural study revealed finer grain size, closely spaced network and increased volume fraction of secondary eutectic phases for HPDC specimen when compared to that of t

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Kini, Anoop Raghunath. "Semisolid Die Casting of Wrought A6061 Aluminium Alloy." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3317.

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The mechanical properties achieved with high performance wrought aluminium alloys are superior to cast aluminum alloys. To obtain an intricate shaped component, wrought alloys are commonly subjected to forging followed by subsequent machining operation in the automobile industry. As machining of such high strength wrought aluminium alloys adds to cost, productivity gets affected. Shortening the process by near net shaped casting would tremendously enhance productivity. However, casting of such alloys frequently encounter hot tear defect. Therefore, circumventing hot tear to successfully die ca

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Kini, Anoop Raghunath. "Semisolid Die Casting of Wrought A6061 Aluminium Alloy." Thesis, 2013. http://etd.iisc.ernet.in/2005/3317.

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The mechanical properties achieved with high performance wrought aluminium alloys are superior to cast aluminum alloys. To obtain an intricate shaped component, wrought alloys are commonly subjected to forging followed by subsequent machining operation in the automobile industry. As machining of such high strength wrought aluminium alloys adds to cost, productivity gets affected. Shortening the process by near net shaped casting would tremendously enhance productivity. However, casting of such alloys frequently encounter hot tear defect. Therefore, circumventing hot tear to successfully die ca

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CHIANG, TSO CHUNG, and 蔣作群. "The reaserch of casting and anodizing for aluminum alloy." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/08240296473611572335.

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碩士<br>國立中央大學<br>機械工程學系<br>85<br>AbstractThe purpose of the research is to improve the capability of casting ,welding and coloring anodized aluminum of two different materials , such as Al-Mg 514 cast alloy aluminum and Al-Zn-Mg 7005 extrusion aluminum. Since casting a 514 alloy thin rectangular test plate (250㎜×120㎜×4 ㎜)for welding was not easy , the author adopted four methods for casting and did many tests to solve it. Subsequently the property of 514 alloy was promoted by using various

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Lee, Chih-Min, and 李智銘. "Investigation of Oxidation and corrosion of casting Ti-Alloy." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/87148907956119674970.

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LIN, GUAN-YI, and 林冠億. "Application of CAE in Aluminum Alloy Tilt Gravity Casting." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/h89y4x.

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碩士<br>逢甲大學<br>機械與電腦輔助工程學系<br>106<br>The objective of this research is to evaluate the effectiveness of gating design and misrun problem caused by back pressure of the A356 aluminum alloy tilt gravity casting vent using the foundry CAE software, ProCAST. The metallographic microstructure and hardness variation of A356 aluminum alloy casting through melt treatment to heat treatment are also evaluated. The simulation result shown that unpressurized gating system with gating ratio of “1:1.7:3.52” has a lower flow speed than “1:1.7:1.13”. Flow speed decreased about 18%. The molten aluminum flow ge

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34

Phani, Akella Siva Durga. "A Comparative Study of the Sn-Ag, Sn-Zn, Sn-Cu, Sn-Bi Lead Free Solder Alloys with the Commercially Available Sn-Pb Solder Alloy." Thesis, 2016. http://ethesis.nitrkl.ac.in/8079/1/2016_M_Tech_711MM1132_A_Compararative_Study.pdf.

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As soldering controls the effective usage and processing of electronic components in applications and devices. Solders are used as interconnect materials in microelectronic packaging. Traditionally Pb-Sn eutectic alloys have been used due to its low melting point and good wettability. However, due to the toxic nature of lead (Pb) and it harmful effect on environment and health the usage of Pb in solder should be avoided. This is why there is a need to develop environmentally benign Pb-free solders (LFS).In this research work four different lead free solder

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Kumar, Punit. "Modification of Az91 Magnesium Alloy for High Temperature Application." Thesis, 2015. http://ethesis.nitrkl.ac.in/7843/1/2015_MT_Modification_Punit_Kumar.pdf.

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In recent years, the lightweight requirement has become crucial in aerospace and automobile application. Mg alloys provide an excellent alternative to conventional structural metals and alloys as it has the highest specific strength. Mg-alloy AZ91 (Mg-9Al-0.8Zn-0.2Mn) is the most favored alloy, being used in approximately 90% of all magnesium cast products. It has good castability, excellent room temperature (RT) mechanical properties and has low cost compared to other Mg-alloys. However, above 120°C its mechanical properties deteriorate because of the low softening temperature of same ß-Mg17A

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Dehury, Ranjit Kumar. "Impression Creep and Corrosion Behaviour of MRI230D Magnesium Alloy." Thesis, 2016. http://ethesis.nitrkl.ac.in/9320/1/2016_MT_RKDehury.pdf.

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Impression creep and corrosion behaviour of the MRI230D alloy have been investigated. The impression creep experiments are carried out in the temperature range 150-225oC and stress range 225-325 MPa by impressing a cylindrical indenter on the surface of specimen. Microstructure of MRI230D consists of α-Mg phase, (Mg,Al)2Ca (C36) phase and few Al-Mn-rich phase. All the creep plots exhibit a well-defined primary creep followed by secondary (steady state) creep. Tertiary stage is missing in all the plots owing to the compressive nature of the tests. The values of stress exponent (n) vary from 5.0

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Mishra, Srimant Kumar. "Ratcheting and ratcheting-creep interaction in A356 aluminium alloy." Thesis, 2018. http://ethesis.nitrkl.ac.in/9404/1/2018_PhD_SKMishra_513MM1001_Ratcheting.pdf.

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In automobile sectors, particularly inner turbo frame, engine blocks, pistons etc. and in aerospace industries the components like pistons, brackets, pulleys, wheels etc. are fabricated from the cast A356 aluminium alloy. Most of these components are frequently exposed to cyclic loading at elevated temperature and the major cause behind failure of such components is fatigue as well as creep. Fatigue damage becomes much more severe when the cyclic loading is asymmetric in nature; this kind of loading causes build-up of plastic strain in the structure during each cycle and thus, causes premature

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(7041476), Mohamadrusydi B. Mohamadyasin. "DEVELOPMENT OF HIGH DUCTILITY ALUMINUM ALLOYS FOR DIE CASTING." Thesis, 2019.

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<p>Aluminum-Silicon (Al-Si) alloys are often preferred in the die casting industry due to excellent castability, high strength, corrosion resistance and low cost. Commonly, iron (Fe) is alloyed with the alloys to prevent die soldering. However, the addition of Fe in most of Al-Si alloys leads to formation of the intermetallic β-AlFeSi. The β-AlFeSi is harmful to the alloy structural integrity due to its needle-like morphology that creates stress concentration at the microscopic level. The phase presence is unfavorable to the mechanical properties and significantly reduces the elongation of the

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Huang, Bo-Zhi, and 黃柏智. "Evaluation on the Effect of Casting and Metallurgical parameters on the A356 Alloy Casting by Using the Pep-Set Casting Process." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/38188856322773175537.

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碩士<br>逢甲大學<br>機械工程學所<br>91<br>This research investigated the effects of casting parameters ( addition amount of resin and hardener, grain size, PH value and moisture content of the raw material sand, etc. ) and metallurgical parameters (modification , refining of grain, degassing condition, melting temperature, etc. ) on the sand mold properties ( shear strength, permeability ) and the casting qualities ( surface quality, tensile strength, elongation) of the A356.2(Al-Si-Mg) alloy casting produced by Pep-Set casting process. The experimental results are as follows: For casting parameters, wh

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Kuan, Chung-Hao, and 關中皓. "Studies on Squeeze Casting and Gravity Casting in Gas Tungsten Arc Welding of A356 Aluminum Alloy." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/39512267594439091470.

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碩士<br>國立中央大學<br>機械工程學系<br>85<br>A356 aluminum alloy of the squeeze castings and gravity castings were fusion welded with the gas tungsten arc welding process.The effects of gas flow rates,T6 heat treatment, and the type of filler metal were investigated under different welding conditions. The appearance of the welded surface under anodic treatment was also compared and analyzed. It was found that the gas flow rates greatly influenced the weld porosity and the evaporation of low boiling poi

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Wu, Chi-Yuan, and 巫吉原. "On Hot Cracking Property of Al-Zn-Mg Casting Alloy." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/00635494328585529780.

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碩士<br>國立成功大學<br>材料科學(工程)學系<br>85<br>Wrought Al-Zn-Mg alloys possess high mechanical properties, hence it is worth to study and develop their casting materials. However, owing to their poor fluidity and feeding characteristic, Al-Zn-Mg alloys are liable to producing hot tear and porosity in casting process. The purpose of this research is to optimize an optimum composition for hot tear resistance, and to study the factors which are conducive to the hot tear resistance of the Al-Zn-Mg cas

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42

ching, cheng chia, and 鄭嘉慶. "Research on the Improvement of Soundness AG40A Zinc Alloy Casting." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/37194388425793774608.

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碩士<br>大葉大學<br>機械工程研究所碩士班<br>94<br>The defects of zinc alloy die-castings often happen due to its characters and the fast die-casting sped. This research was main mainly focus on the resolution of solving those defects in the AG40A zinc sanitary die-casting. The different designs of casting established by the CAE and the real castings by the hot chamber die-casting will be compared to reveal the optimal process used for the AG40A zinc alloy die-castings. The process parameters considered in this research include the casting pressure, the pouring temperature and the mold temperature of die. Ut

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43

Peter-Tseng and 曾震. "The Runner Design Study of Aluminum Alloy in Die Casting." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/27250519571431366811.

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碩士<br>國立臺灣海洋大學<br>機械與輪機工程學系<br>92<br>Abstract Die Casting has become a common and important manufacturing operation for technology industry in Taiwan, and it has drawn a lot of attentions from both the academic and industrial research projects. One of the major phases in die casting production is the design and analysis of die-casting die that ensures higher product quality and longer die operation time. Apart from consulting past production experience, a common approach is to carry out exhausted process simulations on a computer by running reliable analysis software. In this dissertation, des

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Chi-HeChen and 陳麒合. "Using gel casting to produce FeSiCr alloy powder molding chokes." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9mmdtr.

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碩士<br>國立成功大學<br>資源工程學系<br>107<br>In this study, molding chokes using FeSiCr alloy powder as the raw material were prepared by gel casting, and the structures and magnetic properties of the samples prepared by dry pressing and gel casting were compared. The experimental results showed that the low-viscosity slurry used in the gel casting process can significantly improve the powder filling uniformity in the center of the coil. For the small-sized and high-inductance molding chokes, the problem of the uneven packing in the center of the coils can be effectively solved by using gel casting, there

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Naithani, Nitin. "Characterization and Comparison of Lead Free Eutectic Sn-Based Solder Alloys and the Effect of Addition of Ni in Eutectic Sn-0.7Cu Solder Alloy." Thesis, 2017. http://ethesis.nitrkl.ac.in/9019/1/2017_MT_NNaithani.pdf.

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Until recently, lead-containing alloys were used widely in electronic and automotive industry. However, with the implementation of European union environmental directives, the use of such alloys has become prohibited. In this work we have studied various eutectic system like Sn-8.8 wt. % Zn, Sn-3.5 wt. % Ag and Sn-43 wt. % Bi and Sn-0.7 Cu to find best alternative of Sn-Pb solder alloy. Further we have studied the effect of Ni addition on the properties of Sn-0.7Cu solder alloy. The characterization of microstructure was done by optical as well as SEM. Energy Dispersive X- ray spectroscopy was

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(10729758), Clayton M. Kibbey. "A380 Aluminum Hot Chamber Die Casting." Thesis, 2021.

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A hot chamber die casting machine designed for zinc was donated to Purdue University. This machine was slated for retrofit of components necessary for aluminum hot chamber die casting. Existing components designed for zinc, mainly H-13 and cast iron, do not have the necessary service life to economically produce castings due to chemical attack on machine components from molten aluminum. Multiple systems were redesigned, including the pot, plunger, gooseneck, furnace, and cooling lines. All components were upgraded to allow for the higher service temperatures needed for molten aluminum, a

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Bhale, Pranav. "Effect of Deep Cryogenic Treatment on Microstructure and Properties of AE42 Magnesium Alloy." Thesis, 2015. http://ethesis.nitrkl.ac.in/7225/1/2015_Effect_Bhale.pdf.

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There has been a great interest of using magnesium (Mg) alloys in automotive industries owing to its high specific strength, high thermal conductivity, good damping capacity and good machinability. The use of Mg alloys in automobile increases fuel efficiency and reduce emissions by reducing the vehicle weight. The AE42 alloy is a promising creep resistant Mg alloy and it is suitable for application up to 175°C. Cold treating is a very old process and is widely used for high precision parts to enhance their properties. Cold treatment can be done in 2 ways. When treatment is done at temperatu

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Al-Kazzar, Haider. "Nd: YAG laser welding of ZE41A-T5 magnesium sand casting alloy." Thesis, 2006. http://spectrum.library.concordia.ca/8931/1/MR16249.pdf.

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Butt joints of ZE41A-T5 plates with two thicknesses (2 and 6 mm) were laser welded using 1.6 mm EZ33A-T5 filler wire and a continuous wave Nd:YAG system with variable laser process parameters; power (2.5--4 kW), welding speed (2--7 m/min), joint gap (0--0.6 mm) and defocusing distance (0 to -4 mm). Acceptable weld geometries with smooth top and bottom profiles and minor defects were produced with the open keyhole mode. The optimum laser power was 4 kW for both thicknesses, and the welding speed was 6 and 2 m/min for thin and thick plates, respectively. The suitable gap size for the 2 mm and 6

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Lim, Tiong-wei, and 林長偉. "Quality evaluation of AZ91D recycling magnesium alloy in die-casting process." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86721732930185342635.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>95<br>In general die casting factory, large volume of recycling AZ91D magnesium alloy materials were used. Although the recycled manufacturing supplier’s materials meet the standard norm, due to the difference of recycled material used the quality of the die casting parts was influenced widely and the understanding of the causes are limitedly. The main purpose of this research is to understand the influences of recycling AZ91D magnesium alloy to the mechanical property and corrosion resistance of the die casting parts. By choosing three existing reputed brand AZ91D m

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LIN, H. Y., and 林宏宇. "The CAE Analyses of Riser Feedability for A356 Aluminum Alloy Casting." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/55554938667993403938.

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碩士<br>大葉大學<br>機電自動化研究所碩士班<br>93<br>The study of riser feeding is mainly focus on steel and cast iron,but their feeding principles are not suitable for A356 aluminium Alloy.This research used the CAE software-AFSolid system to modify Caine's riser feeding rule and to measure the feeding distance of riser for A356 aluminium alloy.The flowing velocity of computer simulation result reveals the different effect of various gating ratio for gating system.The empirical model of feeding distances of risers for A356 aluminium alloy casting was also calculated by regression analysis method.In addition,t

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