Multimodal Microstructure Evolution in Wrought Mg-Zn-Y Alloys with High Strength and Increased Ductility

被引：15

作者：

Yamasaki, Michiaki ^{[1
]}

Hashimoto, Kenji ^{[1
]}

Hagihara, Koji ^{[2
]}

Kawamura, Yoshihito ^{[1
]}

机构：

[1] Kumamoto Univ, Dept Mat Sci, 2-39-1 Kurokami, Kumamoto 8608555, Japan

[2] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, Suita, Osaka 5650871, Japan

来源：

PRICM 7, PTS 1-3 | 2010年 / 654-656卷

关键词：

Magnesium; long period stacking ordered structure; secondaly dendrite arm spacing; dynamic recrystallization; PERIOD ORDERED STRUCTURE; MECHANICAL-PROPERTIES;

D O I：

10.4028/www.scientific.net/MSF.654-656.615

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High strength and ductile Mg96Zn2Y2 (at%) alloys with multi-modal microstructure are developed. Microstructure of the extruded Mg96Zn2Y2 alloy consists of three regions; the dynamically recrystallized alpha-Mg fine-grains region, the hot-worked alpha-Mg coarse-grains region elongated along extrusion direction, and the long-period stacking ordered (LPSO) phase region with kink deformation bands. Bimodal microstructure evolution in alpha-Mg matrix is influenced by the morphology of the LPSO phase in the as-cast state, therefore, the effect of secondary dendrite arm spacing in cast state on the microstructure evolution and mechanical properties of the extruded Mg-Zn-Y alloy is investigated. An increase in the dynamically recrystallized grains improves ductility of the extruded alloys; the effective dispersion of the LPSO phase enhances strengthening of the alloy.

引用

页码：615 / +

页数：2

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