Plastic deformation behavior of Mg97Zn1Y2 extruded alloys

被引：47

作者：

Hagihara, K. ^{[1
]}

Kinoshita, A. ^{[1
]}

Sugino, Y. ^{[1
]}

Yamasaki, M. ^{[2
]}

Kawamura, Y. ^{[2
]}

Yasuda, H. Y. ^{[1
]}

Umakoshi, Y. ^{[3
]}

机构：

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

[2] Kumamoto Univ, Dept Mat Sci, Kumamoto 8608555, Japan

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2010年 / 20卷 / 07期

基金：

日本科学技术振兴机构;

关键词：

plastic deformation; yield stress; LPSO-phase; dislocation; twinning; ROOM-TEMPERATURE; MG; STRENGTH; MECHANISMS; METALS;

D O I：

10.1016/S1003-6326(09)60288-0

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The mechanical properties of the Mg97Zn1Y2 extruded alloy containing the long-period stacking ordered phase, the so-called LPSO-phase, with a volume fraction of 24%-25%, were examined by compression tests and cyclic tension compression deformation tests. The plastic behavior of the extruded alloys with compositions of Mg99.2Zn0.2Y0.6 and Mg89Zn4Y7 (molar fraction, %), which were almost the same compositions of Mg matrix phase and LPSO phase in Mg97Zn1Y2 Mg/LPSO two-phase alloy, respectively, were also prepared. By comparing their mechanical properties, the strengthening mechanisms operating in the Mg97Zn1Y2 extruded alloy were discussed. Existence of the LPSO-phase strongly enhanced the refinement of Mg matrix grain size during extrusion, which led to a large increment of the strength of alloy. In addition, the LPSO-phases, which were aligned along the extrusion direction in Mg97Zn1Y2 extruded alloy, acted as hardening phases, just like reinforced fibers.

引用

页码：1259 / 1268

页数：10

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