Superplasticity in a Fine-Grained Mg-Zn-Y-Zr Alloy Containing Quasicrystalline Particles
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- Kim Yule
- Department of Metallurgical Engineering, Yonsei University
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- Bae Donghyun
- Department of Metallurgical Engineering, Yonsei University
書誌事項
- タイトル別名
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- Superplasticity in a Fine-Grained Mg—Zn—Y—Zr Alloy Containing Quasicrystalline Particles
- Superplasticity in a Fine-Grained Mg—Zn—Y—Zr Alloy Containing Quasicrystalline Particles
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A Mg—Zn—Y—Zr alloy sheet containing icosahedral quasicrystalline particles and Zr-rich particles has been developed by the thermomechanical processes, i.e. hot extrusion and hot rolling. The grain size is found to be 5 μm. The superplastic deformation behavior of the alloy has been investigated. Under the test condition in the strain rate range of 5 × 10−4 to 5 × 10−2 s−1 and the temperature range between 300°C and 450°C, large elongation to failures are observed, especially around 600% at 450°C (5 × 10−4 s−1). During superplastic deformation, the concurrent grain growth rate is significantly retarded by the presence of I-phase particles, thermally stable at the temperature up to around 500°C. In addition, the formation of cavities is found to be negligible because of interfacial coherency between icosahedral quasicrystalline particles and the α-Mg matrix. Although superplastic deformation could be relatively prevented by the pinning effect of the distributed particles, microstructure stability can provide large elongation to failure in such an alloy.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 45 (12), 3298-3303, 2004
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
- 1390001204251680128
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- NII論文ID
- 130004452338
- 30018850991
- 10014238284
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- NII書誌ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BD2MXht12lsLg%3D
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 7197171
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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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