The Effects of Yttrium Element on Microstructure and Mechanical Properties of Mg-5 mass%Al-3 mass%Ca Based Alloys Fabricated by Gravity Casting and Extrusion Process
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- Son Hyeon-Taek
- Korea Institute of Industrial Technology
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- Lee Jae-Seol
- Korea Institute of Industrial Technology
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- Kang Chang-Seog
- Korea Institute of Industrial Technology
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- Bae Jung-Chan
- Korea Institute of Industrial Technology
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- Yoshimi Kyosuke
- Department of Environmental Studies, Graduate School of Environmental Studies, Tohoku University
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- Maruyama Kouichi
- Department of Environmental Studies, Graduate School of Environmental Studies, Tohoku University
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Abstract
The as-cast microstructure of Mg-5Al-3Ca-xY alloy consists of dendritic α-Mg matrix, (Mg, Al)2Ca eutectic phase and Al2Y intermetallic compounds. These two kind of (Mg, Al)2Ca compounds were observed: coarse irregular-shape structure at grain boundary and fine needle-shape structure in the α-Mg matrix grain. This (Mg, Al)2Ca phase of the extruded alloys was elongated to extrusion direction and size of this phase was refined comparing with that of as-cast alloys because of severe deformation during hot extrusion. Maximum yield and ultimate strength value of extruded alloys was 326 and 331 MPa at Mg-5Al-3Ca-3Y alloy, respectively. From these results, it is conclusively demonstrated that Y additions on Mg-5Al-3Ca alloy have more effect to improve mechanical properties.
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 49 (5), 945-951, 2008
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390001204249364864
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- NII Article ID
- 10021146382
- 130004454010
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 9480248
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed