Effects of yttrium on creep behavior and deformation substructures of magnesium

被引：16

作者：

Suzuki, M ^{[1
]}

Inoue, R ^{[1
]}

Sugihara, M ^{[1
]}

Sato, H ^{[1
]}

Koike, J ^{[1
]}

Maruyama, K ^{[1
]}

Oikawa, H ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

来源：

MAGNESIUM ALLOYS 2000 | 2000年 / 350-3卷

关键词：

dislocation substructure; high temperature creep; magnesium-yttrium alloys; planar defects;

D O I：

10.4028/www.scientific.net/MSF.350-351.151

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Compressive creep behavior and deformation substructures of binary Mg-Y(-Zn) alloys were investigated at 550K similar to 650K under 4 similar to 200MPa. Creep strength of magnesium is significantly improved by addition of yttrium as compared with Mg-3mol%Al solution hardening: alloy. The small addition of zinc (less than 0.1mass%) to Mg-Y binary alloys is effective to decrease creep rate by more than one order of magnitude. This effect is remarkable in solid-solution state and diminishes in precipitation-hardening alloys. TEM observations reveal that many 'planer defects' with a+c-component are introduced on the basal planes in Mg-Y-Zn alloys. These defects can act as the obstacles for dislocation motion and high strain-hardening increases creep resistance of Mg-Y-Zn alloys.

引用

页码：151 / 156

页数：6

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