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- W4324291264 abstract "Mg alloys have poor formability due to their hexagonal tightly packed (HCP) crystal structure, low active shear system at room temperature, and anisotropic behavior in polycrystalline structure. While this situation hindered the development and commercialization of Mg alloys to some extent in the past, today developments in machining, liquid forming and semi-solid forming technology have removed these obstacles. Semi-solid forming of alloys has been the subject of intense R&D since it was discovered in the 1970s. In the semi-solid forming method, it is aimed to obtain ideal microstructure of the alloy, including excellent fluidity, appropriate flow control, adjustable viscosity and controllable grain morphology, thanks to equiaxed spherical solid particles surrounded by liquid. In this study, it is aimed to achieve the spherical microstructure required for the semi-solid shaping of the extruded AZ31 Mg alloy by heating to semi-solid temperatures and isothermal holding in the semi-solid temperature range. To accomplish this objective, rapid heating in the induction coil and controlled holding in the isothermal temperature range were applied to the alloy. Heating the extruded AZ31 Mg alloy to a semi-solid temperature (565-630°C) and subsequently rapid cooling processes lead to many intermetallic Mg17Al12(γ) compounds with heterogeneous distribution both in the equiaxed primary Mg(α) grains and at the grain boundaries as well as a very little eutectic at the grain boundaries. As the semi-solid temperature value increased, the degree of spheroidization increased. However, it was found that the grain growth reached a maximum at one point and there was no significant change in the shape factor as a result of controlled holding time." @default.
- W4324291264 created "2023-03-16" @default.
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- W4324291264 date "2023-03-25" @default.
- W4324291264 modified "2023-09-26" @default.
- W4324291264 title "Investigation of The Effect of Semi-Solid Temperatures and Holding Times at Isothermal Range On Microstructure of AZ31 Mg Alloy" @default.
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- W4324291264 doi "https://doi.org/10.29109/gujsc.1187050" @default.
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