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J. Jpn. Inst. Light Met. 48(12)_ 618-623 (1998).pdf904.06 kBPDFView/Open
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Title: 混合急冷された過共晶Al-Si合金の初晶凝固に及ぼす対流混合の影響
Other Titles: Effects of convective mixing on primary crystallization in a hypereutectic Al-Si alloy quenched during mixing of two molten alloys
Authors: 大参, 達也1 Browse this author →KAKEN DB
松浦, 清隆2 Browse this author →KAKEN DB
工藤, 昌行3 Browse this author
伊藤, 洋一4 Browse this author
Authors(alt): Ohmi, Tatsuya1
Matsuura, Kiyotaka2
Kudoh, Masayuki3
Itoh, Youichi4
Keywords: numerical simulation
hypereutectic Al-Si alloy
Issue Date: Dec-1998
Publisher: 軽金属学会
Journal Title: 軽金属
Journal Title(alt): Journal of Japan Institute of Light Metals
Volume: 48
Issue: 12
Start Page: 618
End Page: 623
Publisher DOI: 10.2464/jilm.48.618
Abstract: The mixing-crystallization model has been used to evaluate the effects ofthe convective mixing on the undercooling and solidification behavior of a hypereutectic Al–Si alloy during the mixing process of two different molten alloys: the first melt (Al–12 mass%Si alloy) and the second melt (Al–32 mass%Si alloy). This model treats the mixing of these alloys in stretching lamellar configurations to consider the interactions between the fluid clumps ofthe second melt. The obtained results are summarized as follows: (1) The undercooling of the second melt in the lamellar configurations are smaller than that in the single slab configuration because of the interactions between the second melt lamellar. (2) The number of primary crystals is maximized at a certain strain rate of stretching lamellar depending on the initial melt-distribution. Therefore, excessive agitation during the initial stage of the solidification may depress the refinement of the primary crystals. (3) Nonuniform distribution of lamellar thickness is effective for the crystal refinement compared with the uniform one.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大参 達也

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