Phase-Field Simulation of Spinodal Decomposition on Metastable Hexagonal Close-Packed Phase in Magnesium–Yttrium–Zinc Alloy
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- Narita Keisuke
- Graduate School of Engineering, Nagoya Institute of Technology
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- Koyama Toshiyuki
- Graduate School of Engineering, Nagoya Institute of Technology
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- Tsukada Yuhki
- Graduate School of Engineering, Nagoya Institute of Technology
書誌事項
- タイトル別名
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- Phase-Field Simulation of Spinodal Decomposition on Metastable Hexagonal Close-Packed Phase in Magnesium–Yttrium–Zinc Alloy
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It has been proposed that a long-period stacking ordered (LPSO) structure is responsible for the excellent mechanical properties of lightweight alloys of Mg–Zn–RE (RE: rare earth elements) system. The phase separation of the metastable hexagonal close-packed (hcp) phase in the Mg–Y–Zn alloy was simulated by means of the phase-field method to discuss the mechanism of formation of the LPSO structure. Near the Mg-corner of the Mg–Y–Zn ternary system, metastable spinodal decomposition occurs before conventional spinodal decomposition, i.e., the supersaturated solid solution of Mg–7 at% Y–7 at% Zn alloy separates into two phases: Mg–12 at% Y and Mg–17 at% Zn. The resulting microstructure has a lamellar morphology, elongated along the [0001] direction of the hcp phase, with a wavelength of ∼7 nm. The calculated orientation of the lamellar is completely different from that of the LPSO structure. Therefore, it is difficult to explain the formation of the LPSO structure directly in terms of a spinodal decomposition of the hcp phase in the Mg–Y–Zn ternary system.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 54 (5), 661-667, 2013
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
- 1390282679225986688
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- NII論文ID
- 10031168407
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 024456314
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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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