Microstructure Evolution and Growth Orientation of Directionally Solidified Mg-4 wt% Zn Alloy with Different Growth Rates

IMR OpenIR

	Microstructure Evolution and Growth Orientation of Directionally Solidified Mg-4 wt% Zn Alloy with Different Growth Rates
	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.
	2017-12-01
发表期刊	CHINESE ACAD SCIENCES, INST METAL RESEARCH
ISSN	1006-7191
卷号	30 期号:12 页码:1185-1191
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.
部门归属	[jia, hong-min ; feng, xiao-hui ; yang, yuan-sheng] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [jia, hong-min] univ chinese acad sci, beijing 100039, peoples r china ; [yang, yuan-sheng] shandong key lab high strength lightweight metall, jinan 250014, shandong, peoples r china
关键词	Directional Solidification Mg-zn Alloy Microstructure Evolution Primary Dendritic Arm Spacing Growth Orientation
学科领域	Metallurgy & Metallurgical Engineering
收录类别	SCI
语种	英语
WOS记录号	WOS:000414266400006
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78959
专题	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.