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https://hdl.handle.net/20.500.14094/90005008
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2024-04-30
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90005008 (fulltext)
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メタデータID
90005008
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open access
出版タイプ
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タイトル
Effect of Solidification Cooling Rate on Microstructure and Mechanical Properties of an Extruded Mg-Zn-Y Alloy
著者
Singh, Alok ; Osawa, Yoshiaki ; Somekawa, Hidetoshi ; Mukai, Toshiji
著者名
Singh, Alok
著者名
Osawa, Yoshiaki
著者名
Somekawa, Hidetoshi
著者ID
A0967
研究者ID
1000040254429
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=71b4c03e27b0abd6520e17560c007669
著者名
Mukai, Toshiji
向井, 敏司
ムカイ, トシジ
所属機関名
未来医工学研究開発センター
収録物名
Metals
巻(号)
8(5)
ページ
337-337
出版者
MDPI
刊行日
2018-05-10
公開日
2018-07-09
抄録
The Effect of the solidification conditions and subsequent extrusion of a Mg-3.0Zn-0.5Y (at. %) alloy containing quasicrystalline icosahedral (i-) phase was studied. Solidification was carried out by three methods using a chill casting mold, a conventional steel mold and a water-cooled mold. Subsequently, castings were extruded in the temperature range of 235-270 ∘ C at an extrusion ratio of 25:1. The solidification molds showed different characteristics. The water-cooled mold was most effective in cooling through the walls, but least effective at the center of the mold. The conventional cast mold was the most effective in cooling at the mold center. All the castings had an interdendritic eutectic structure of the i-phase, and a supersaturation of the matrix in zinc. As a result, all the extrusions had similar grain size close to 1 mu m and very fine nano-size precipitation. Yield strengths in tension were in the range of 376 and 404 MPa, and from 300 to 330 MPa in compression. All elongations to fracture were about 13%. It is concluded that supersaturation of the matrix during solidification is the main factor, resulting in the dynamic precipitation of very fine precipitates and fine grain size during extrusion.
キーワード
magnesium alloys
quasicrystal
casting
extrusion
tensile strength
compression strength
microstructure
transmission electron microscopy
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未来医工学研究開発センター
学術雑誌論文
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© 2018 by the authors. Licensee MDPI, Basel, Switzerland.
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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資源タイプ
journal article
言語
English (英語)
eISSN
2075-4701
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関連情報
DOI
https://doi.org/10.3390/met8050337
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