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Dijital Arşivi

Effects of thermal conditions on the mechanical properties of squeeze cast ZA-27 alloy

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dc.contributor Graduate Program in Mechanical Engineering.
dc.contributor.advisor Savaş, Mahmut A.
dc.contributor.author Morgül, Erol.
dc.date.accessioned 2023-03-16T11:15:20Z
dc.date.available 2023-03-16T11:15:20Z
dc.date.issued 2007.
dc.identifier.other ME 2007 M67
dc.identifier.uri http://digitalarchive.boun.edu.tr/handle/123456789/14912
dc.description.abstract Squeeze casting is a generic term to specify a fabrication when solidification is promoted under high-pressure within a re-usable die. It is a metal-forming process, which combines permanent mould casting with die forging into a single operation where molten metal is solidified under applied hydrostatic pressure. Squeeze casting has a greater potential to produce less defective cast components contrary to the other conventional casting techniques. In the present study, the aim was to search thermal solidification behavior and mechanical properties of a squeeze cast ZA-27 alloy in three different pressure ranges. For this purpose, totally 20 samples were cast under 0,1 MPa, 100 MPa and 150 MPa squeezing pressures. All of the samples were subjected to thermal analysis involving temperature measurement at three different points and die surface using K-type thermocouples, data logger and infrared camera. Heat transfer coefficient between the molten metal and die was calculated under some assumptions and cooling curves were obtained. Beside temperature analyses, some mechanical tests were carried out. During machining the samples by lathe, a lot of chips were collected and machinability characteristics were investigated depending on chip lengths; and the Brinell hardness tests, surface roughness measurements and tension tests were done. For microstructural analysis, the scanning electron microscope investigation and metallographic observation were carried out. 28 SEM photographs were taken and 3 metallographic observation done to observe the microstructure properties depending on squeezing pressures. At result, it was found that, when the squeezing pressure was increased, the heat transfer coefficient between the molten metal and die and mechanic characteristics of cast samples were improved.
dc.format.extent 30cm.
dc.publisher Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007.
dc.relation Includes appendices.
dc.relation Includes appendices.
dc.subject.lcsh Alloys -- Thermal properties.
dc.subject.lcsh Zinc alloys.
dc.title Effects of thermal conditions on the mechanical properties of squeeze cast ZA-27 alloy
dc.format.pages xvi, 128 leaves;


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