The Effect of Microstructure Evolution on the Elevated Temperature Mechanical Properties in Mg-Sn-Ca System
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- Kim Do Hyung
- Center for Noncrystalline Materials, Dept. of Metallurgical Eng., Yonsei University
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- Lee Ju Youn
- Center for Noncrystalline Materials, Dept. of Metallurgical Eng., Yonsei University
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- Lim Hyun Kyu
- Center for Noncrystalline Materials, Dept. of Metallurgical Eng., Yonsei University
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- Kyeong Joon Seok
- Center for Noncrystalline Materials, Dept. of Metallurgical Eng., Yonsei University
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- Kim Won Tae
- Applied Science Division, Cheongju University
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- Kim Do Hyang
- Center for Noncrystalline Materials, Dept. of Metallurgical Eng., Yonsei University
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抄録
The effect of microstructural evolution on the creep properties in Mg-Sn-Ca system has been investigated. As-cast microstructure of Mg-Sn-Ca alloy consists of two or three phases depending on the Ca/Sn ratio, i.e. Mg2Sn, CaMgSn and Mg2Ca phases. Ternary CaMgSn phase has two types of morphology by its pseudo hyper-eutectic reaction with α-Mg; coarse rod-like primary or feather-like eutectic phase. Primary solidified CaMgSn phase exhibit negative effect on the tensile properties in spite of its high thermal stability up to 500°C. According to the creep test results, apparent stress exponent value (n=7) indicates climb controlled creep mechanism by core diffusion above 150°C. Activation energy of Mg-5Sn-2Ca alloy (74 kJ/mol) is close to grain boundary diffusion for pure magnesium, 92 kJ/mol. Creep resistance is remarkably improved with the presence of Mg2Ca phase.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 49 (10), 2405-2413, 2008
公益社団法人 日本金属学会
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詳細情報
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- CRID
- 1390282679227536384
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- NII論文ID
- 10024326468
- 130004453787
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- NII書誌ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BD1cXhsVKgtrzL
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 9663535
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可