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Microstructure evolution of Al-Si semi-solid slurry by gas bubble stirring method

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Abstract

A novel technique of introducing gas bubble stirring during solidification was studied to prepare Al-Si semi-solid slurry. The microstructure evolution of the slurry during slow cooling process after stirring was investigated. The effects of the solidification rate on the microstructure of the semi-solid slurry were investigated under three different solidification conditions. The results show that fine non-dendritic slurry can be obtained using the gas bubble stirring method. Ripening and coarsening of primary Al grains are observed during the slow cooling process, and at last coarsened eutectic Si appears. Primary Al grains with different sizes and eutectic Si are obtained, corresponding to three different solidification rates.

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Authors and Affiliations

  1. State Key Laboratory of Material Forming and Mould and Die Designing, Huazhong University of Science and Technology, Wuhan, 430074, China

    Lei Zhang  (张磊), Xuan-pu Dong  (董选普), Kan Li  (李侃), Zong-kui Zhang  (张宗奎), Wen-jun Wang  (王文俊) & Zi-tian Fan  (樊自田)

  2. School of Mechanical and Energy, Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China

    Ji-qiang Li  (李继强)

Authors
  1. Lei Zhang  (张磊)
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  2. Xuan-pu Dong  (董选普)
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  3. Ji-qiang Li  (李继强)
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  4. Kan Li  (李侃)
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  5. Zong-kui Zhang  (张宗奎)
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  6. Wen-jun Wang  (王文俊)
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  7. Zi-tian Fan  (樊自田)
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Corresponding author

Correspondence to Xuan-pu Dong  (董选普).

Additional information

Foundation item: Project(50775085) supported by the National Natural Science Foundation of China; Project(M2009061) supported by Special Fund for Basic Research and Operating Expenses of Central College, China; Project(2008A610049) supported by the Natural Science Foundation of Ningbo City, China

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Zhang, L., Dong, Xp., Li, Jq. et al. Microstructure evolution of Al-Si semi-solid slurry by gas bubble stirring method. J. Cent. South Univ. Technol. 18, 1789–1794 (2011). https://doi.org/10.1007/s11771-011-0903-3

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  • DOI: https://doi.org/10.1007/s11771-011-0903-3

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