| Summary: | 碩士 === 國立成功大學 === 材料科學及工程學系碩博士班 === 98 === The purpose of this study is to improve the equipment of the electromagnetic stirring process and the parameters of the process. We can get a reliable and effective method to prepare magnesium alloy with equi-axis and tiny grains after optimizing the process. Expect that it could apply to the follow-up forming and manufacturing, then it could be used in industrialization for the final goal.
This study mainly discusses the effects of parameters of the electromagnetic stirring on the morphologies of the ingots, macroscopic defects and microstructures. And processing parameters include the stirring current, the stirring time, the cooling rate, the initial cooling temperature and the temperature of the temperature controller.
By mean of the improvement of the equipment and the revising of the parameters, the improvements of the structures of magnesium alloy have obtained some preliminary achievements.
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