Formation of a lamellar 14H-type long period stacking ordered structure in an as-cast Mg-Gd-Zn-Zr alloy

被引：95
作者：
Wu, Y. J. [1 ,3 ]
Lin, D. L. [1 ,2 ]
Zeng, X. Q. [1 ,3 ]
Peng, L. M. [1 ,3 ]
Ding, W. J. [1 ,3 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[3] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE | 2009年 / 44卷 / 06期
关键词：
MECHANICAL-PROPERTIES; MAGNESIUM ALLOY; ELECTRON-MICROSCOPY; STRENGTH; MICROSTRUCTURE; PHASE; TEMPERATURE; ADDITIONS;
D O I：
10.1007/s10853-008-3213-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel as-cast Mg96.82Gd2Zn1Zr0.18 alloy was produced by conventional ingot metallurgy. By scanning electron microscope and transmission electron microscope observations, its as-cast microstructure is mainly composed of the alpha'-Mg solid solution, the coherent fine-lamellae and the eutectic. The beta-phase ((Mg,Zn)(3)Gd) as the second phase in eutectic has a face-center cubic structure. While, the coherent lamellae consist of the 2H-Mg and the 14H-type long period stacking ordered (LPSO) structure. At present, the lamellar 14H-type LPSO structure has first been observed within alpha'-Mg matrix in the as-cast Mg-Gd-Zn-Zr alloys. It can be concluded that the lamellar 14H-type LPSO structure within alpha'-Mg matrix is a special structure obviously different from alpha-Mg matrix (2H-type structure) in structure, composition, and formation condition.
引用
收藏
页码：1607 / 1612
页数：6
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