Creep and Corrosion Properties of the Extruded Magnesium Alloy Containing Rare Earth
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- Jain Chao-Chi
- Department of Materials Science and Engineering, National Taiwan University
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- Koo Chun-Hao
- Department of Materials Science and Engineering, National Taiwan University
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Effects of microstructures on the creep and corrosion properties were investigated in the Mg-8Al alloys with addition of the rare earth elements (La-rich Mischmetal, RE). The addition of RE to Mg-8Al alloy may form a stable intermetallic phase, Al11RE3 at elevated temperature, and suppress the β phase (Mg17Al12) with poor stability at high temperature. The corrosion rate of the alloy slightly decreases with increasing the added RE contents. The constant-load creep behavior was examined at 423, 448 and 473 K under stresses between 40 and 100 MPa. The RE-containing alloy showed a prolonged period of stead-state creep compared to the Mg-8Al base alloy and slightly reduced minimum creep rates. A stress exponent of 2 estimated suggests that the creep behavior can be controlled by the grain boundary sliding. The apparent activation energy for creep of Mg-8Al and Mg-8Al-2RE alloys are 114 and 104 kJ mol−1, respectively.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 48 (2), 265-272, 2007
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679227364608
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- NII論文ID
- 10018508983
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- NII書誌ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BD2sXjtlSru74%3D
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 8623912
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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
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- 使用不可