Microstructure evolution and mechanical properties of the Mg-7Zn-xY-0.6Zr (x=6, 9, 12 wt.%) alloys

被引：1

作者：

Zhang, Z. Q. ^{[1
]}

Yin, S. Q. ^{[1
]}

Liu, X. ^{[1
]}

Bao, L. ^{[1
]}

Hu, W. Y. ^{[1
]}

Le, Q. C. ^{[1
]}

Cui, J. Z. ^{[1
]}

机构：

[1] Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110819, Peoples R China

来源：

KOVOVE MATERIALY-METALLIC MATERIALS | 2017年 / 55卷 / 01期

关键词：

Mg-Zn-Y-Zr; extrusion; casting and solidification; microstructures; mechanical properties; ZN-Y ALLOYS; MAGNESIUM ALLOYS; ZR ALLOYS; PHASE; PARTICLES; BEHAVIOR;

D O I：

10.4149/km_2017_1_13

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mg-7Zn-xY-0.6Zr (x = 6, 9, 12 wt.%) alloys have been designed to investigate the effects of Y content on the microstructure and mechanical properties. The results show that Y content plays a key role in the phase composition and mechanical properties of the investigated Mg-7Zn-xY-0.6Zr alloys. With the Y content increasing from 6 to 12 %, the phase composition transformed from alpha-Mg + W-phase (Mg3Y2Zn3) to alpha-Mg + X-phase (Mg12YZn). The amount of X-phase increases rapidly, and W-phase decreases accordingly. Furthermore, the W-phase distributes alternatively with the X-phase, due to the specific local Y/Zn mole ratio at the final solidifying stage. After extrusion, the phase composition and corresponding volume fraction have great influence on mechanical properties. The X-phase is in favour of high strength and the W-phase makes for good plasticity. The as-extruded Mg-7Zn-12Y-0.6Zr alloy establishes the highest strength with an ultimate tensile and yield tensile strength of 416 MPa and 302 MPa, respectively.

引用

页码：13 / 20

页数：8

共 24 条

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