Effects of electromagnetic vibration on the structure and mechanical properties of AI-6%Si alloy during directional solidification
来源期刊：Acta Metallurgica Sinica2009年第1期
论文作者：Yunbo ZHONG Kang DENG Weili REN Zhongming REN Jianbo YU
Key words：Electromagnetic vibration; Grain refinement; Directional solidification; Mechanical property;
Abstract: The effects of electromagnetic vibration on the grain refinement in directional solid- ification were investigated. It was found that the electromagnetic vibration applied in the melt not only can refine grains remarkably but also can enhance both tensile strength and ductility values of AI-6%Si alloy. SEM graphs show that coarse dendrite structure was broken up into a somewhat globular structure, and the morphology of eutectic silicon was changed from flaky to fibrous under electromagnetic vibration treatment. The refine mechanism under electromagnetic vibration was discussed.
Yunbo ZHONG1，Kang DENG1，Weili REN1，Zhongming REN1，Jianbo YU1
(1.Department of Materials Science and Engineering,Shanghai University,Shanghai 200072,China)
Abstract:The effects of electromagnetic vibration on the grain refinement in directional solid- ification were investigated. It was found that the electromagnetic vibration applied in the melt not only can refine grains remarkably but also can enhance both tensile strength and ductility values of AI-6%Si alloy. SEM graphs show that coarse dendrite structure was broken up into a somewhat globular structure, and the morphology of eutectic silicon was changed from flaky to fibrous under electromagnetic vibration treatment. The refine mechanism under electromagnetic vibration was discussed.
Key words:Electromagnetic vibration; Grain refinement; Directional solidification; Mechanical property;
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