Microstructure Evolution and Growth Orientation of Directionally Solidified Mg-4 wt% Zn Alloy with Different Growth Rates
文献类型：期刊论文
| 作者 | Jia, Hong-Min; Feng, Xiao-Hui; Yang, Yuan-Sheng; Yang, YS (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.; Yang, YS (reprint author), Shandong Key Lab High Strength Lightweight Metall, Jinan 250014, Shandong, Peoples R China. |
| 刊名 | CHINESE ACAD SCIENCES, INST METAL RESEARCH
 |
| 出版日期 | 2017-12-01 |
| 卷号 | 30期号:12页码:1185-1191 |
| 关键词 | Directional Solidification Mg-zn Alloy Microstructure Evolution Primary Dendritic Arm Spacing Growth Orientation |
| ISSN号 | 1006-7191 |
| 英文摘要 | The microstructure evolution and growth orientation of directionally solidified Mg-4 wt% Zn alloy in the growth rate range from 20 to 200 mu m/s were investigated. A typical cellular structure was observed with a growth rate of 20 mu m/s, and the cellular spacing was 115 mu m. When the growth rate increased to 60 mu m/s, cellular structure with some developed perturbations was obtained and the cellular spacing was 145 mu m, suggesting that the cell-to-dendrite transition happened at the growth rate lower than 60 mu m/s. As the growth rate further increased, the microstructure was dendritic and the primary dendritic arm spacing decreased. The relationship between the primary dendritic arm spacings and the growth rates was in good agreement with Trivedi model during dendritic growth. Besides, X-ray diffraction and transmission electron microscopy analyses showed that the growth direction of directionally solidified Mg-4 wt% Zn alloy was < 11 (2) over bar0 > ilay in{0002} crystal plane, and the preferred orientation was explained with the lattice vibration model for one-dimensional monatomic chain.; The microstructure evolution and growth orientation of directionally solidified Mg-4 wt% Zn alloy in the growth rate range from 20 to 200 mu m/s were investigated. A typical cellular structure was observed with a growth rate of 20 mu m/s, and the cellular spacing was 115 mu m. When the growth rate increased to 60 mu m/s, cellular structure with some developed perturbations was obtained and the cellular spacing was 145 mu m, suggesting that the cell-to-dendrite transition happened at the growth rate lower than 60 mu m/s. As the growth rate further increased, the microstructure was dendritic and the primary dendritic arm spacing decreased. The relationship between the primary dendritic arm spacings and the growth rates was in good agreement with Trivedi model during dendritic growth. Besides, X-ray diffraction and transmission electron microscopy analyses showed that the growth direction of directionally solidified Mg-4 wt% Zn alloy was < 11 (2) over bar0 > ilay in{0002} crystal plane, and the preferred orientation was explained with the lattice vibration model for one-dimensional monatomic chain. |
| 学科主题 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 公开日期 | 2018-01-10 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/78959]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yang, YS (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.; Yang, YS (reprint author), Shandong Key Lab High Strength Lightweight Metall, Jinan 250014, Shandong, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Jia, Hong-Min,Feng, Xiao-Hui,Yang, Yuan-Sheng,et al. Microstructure Evolution and Growth Orientation of Directionally Solidified Mg-4 wt% Zn Alloy with Different Growth Rates[J]. CHINESE ACAD SCIENCES, INST METAL RESEARCH,2017,30(12):1185-1191. |
| APA | Jia, Hong-Min,Feng, Xiao-Hui,Yang, Yuan-Sheng,Yang, YS ,&Yang, YS .(2017).Microstructure Evolution and Growth Orientation of Directionally Solidified Mg-4 wt% Zn Alloy with Different Growth Rates.CHINESE ACAD SCIENCES, INST METAL RESEARCH,30(12),1185-1191. |
| MLA | Jia, Hong-Min,et al."Microstructure Evolution and Growth Orientation of Directionally Solidified Mg-4 wt% Zn Alloy with Different Growth Rates".CHINESE ACAD SCIENCES, INST METAL RESEARCH 30.12(2017):1185-1191. |
入库方式： OAI收割
来源：金属研究所
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