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

被引：99

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

页码：1607 / 1612

页数：6

共 25 条

[1] Long-period ordered structure in a high-strength nanocrystalline Mg-1 at% Zn-2 at% Y alloy studied by atomic-resolution Z-contrast STEM [J].