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J. Jpn. Inst. Light Met. 44(9)_ 504- (1994).pdf4.07 MBPDFView/Open
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Title: スラリー・溶湯混合法による半凝固過共晶Al-Si合金の見掛けの粘性挙動
Other Titles: Change in apparent viscosity of stirred slurry during production of semi-solid hypereutectic Al-Si alloy by slurry-melt mixing process
Authors: 大参, 達也1 Browse this author →KAKEN DB
簔口, 光樹2 Browse this author
工藤, 昌行3 Browse this author
伊藤, 洋一4 Browse this author
松浦, 清隆5 Browse this author →KAKEN DB
Authors(alt): Ohmi, Tatsuya1
Minoguchi, Kouki2
Kudoh, Masayuki3
Itoh, Youichi4
Matsuura, Kiyotaka5
Keywords: semi-solid metal
apparent viscosity
hypereutectic aluminum-silicon alloy
hypoeutectic aluminum-silicon alloy
Issue Date: 30-Sep-1994
Publisher: 軽金属学会
Journal Title: 軽金属
Journal Title(alt): Journal of Japan Institute of Light Metals
Volume: 44
Issue: 9
Start Page: 504
End Page: 509
Publisher DOI: 10.2464/jilm.44.504
Abstract: A semi-solid slurry of a hypereutectic Al-Si alloy containing fine primary silicon crystals is producible by "slurry-melt mixing (SMM)" process. In the SMM process, a melt of a phosphorus-added hypereutectic Al-Si alloy (second-alloy melt) is mixed with a semi-solid slurry of a hypoeutectic Al-Si alloy (first-alloy slurry) which has been solidified with stirring in a furnace-cooled vessel. In this study, the change in apparent viscosity of the stirred slurry, whose silicon content changed from 8 to 20mass% by mixing of molten Al-32mass%Si alloy, was measured continuously during the SMM process. Immediately after the mixing of the second-alloy melt, the apparent viscosity decreases drastically from 7 to about 0 Pa•s. This abrupt change is attributed to the following facts: (1) The primary alpha-phase which has been crystallized in the first alloy remelts rapidly in the mixed alloy. (2) The fraction of the primary silicon in the mixed alloy is lower than that of the primary alpha-phase in the first alloy, though there is a strong driving force of crystallization of the primary silicon in the mixed alloy in comparison with the conventionally solidified Al-20mass%Si alloy. (3) The apparent viscosity of the hypereutectic alloy is similar in order of magnitude to that of the hypoeutectic alloy of the same fraction solid.
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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