Experimental Study on Phase Diagram in the Vicinity of X or W Phase in the Mg-Zn-Y Ternary System

被引：4

作者：

Horiuchi, T. ^{[1
]}

Ikee, H. ^{[1
]}

Hamaya, A. ^{[1
]}

Minamoto, S. ^{[2
]}

Nomoto, S. ^{[2
]}

Miura, S. ^{[3
]}

机构：

[1] Hokkaido Inst Technol, Grad Sch Engn, Div Mech Syst Engn, Teine Ku, 7-15-4-1 Maeda, Sapporo, Hokkaido 0068585, Japan

[2] ITOCHU Techno Solutions Corp CTC, Sci & Engn Syst Div, Chiyoda Ku, Tokyo 1006080, Japan

[3] Hokkaido Univ, Fac Engn, Div Mat Sci & Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan

来源：

THERMEC 2011, PTS 1-4 | 2012年 / 706-709卷

关键词：

Mg-Zn-Y; X phase; W phase; phase diagram; CALPHAD; PERIOD ORDERED STRUCTURE; MECHANICAL-PROPERTIES; ALLOY; STRENGTH;

D O I：

10.4028/www.scientific.net/MSF.706-709.1170

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To elucidate the phase equilibria in the vicinity of the X or W phase in the Mg-Zn-Y ternary system, five Mg-Zn-Y ternary alloys containing the X or W phase were prepared and isothermally heat-treated to reach thermodynamic equilibrium. The microstructure and chemical compositions of the equilibrium phases of the alloys were analyzed. Furthermore, the crystal structure of the W phase was investigated, and the liquidus temperatures of the alloys were examined using differential thermal analysis. The results showed that the X phase can be crystallized not by a eutectic reaction, as reported previously, but by a peritectic reaction. They also showed that the W phase has the Heusler-type crystal structure with a stoichiometric composition of Mg1Zn2Y1, and that Mg and Zn in the W phase can be substituted for each other. The Mg-Zn-Y ternary phase diagram was calculated using an assessed CALPHAD thermodynamic database based on the experimental results of the present study, and compared with a recently reported phase diagram.

引用

页码：1170 / +

页数：2

共 15 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].