Effect of long-period stacking ordered phase on mechanical properties of Mg97Zn1Y2 extruded alloy

被引：646

作者：

Hagihara, K. ^{[1
]}

Kinoshita, A. ^{[2
]}

Sugino, Y. ^{[2
]}

Yamasaki, M. ^{[3
]}

Kawamura, Y. ^{[3
]}

Yasuda, H. Y. ^{[2
]}

Umakoshi, Y. ^{[2
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Adapt Machine Syst, Suita, Osaka 5650871, Japan

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

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

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 19期

基金：

日本科学技术振兴机构;

关键词：

Plastic deformation; Magnesium alloys; Extrusion; Fiber-reinforced composites; Intermetallic compounds; ZN-Y ALLOYS; MAGNESIUM ALLOY; DEFORMATION-BEHAVIOR; MG; MICROSTRUCTURE; TEMPERATURE; EXTRUSION; EVOLUTION; STRENGTH;

D O I：

10.1016/j.actamat.2010.07.050

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanical properties of Mg97Zn1Y2 extruded alloy, composed of Mg matrix phase and a long-period stacking ordered phase, the so-called LPSO phase, with a volume fraction of approximately 24%, were investigated using compression tests at room temperature. The microstructure was varied to a large degree by various heat treatments at high temperatures above 400 degrees C, and the relationship between the microstructure and mechanical properties was clarified. The plastic behavior of the Mg,/LPSO two-phase alloy was compared with that of Mg99.2Zn0.2Y0.6 alloy, composed almost Mg-solid-solution phase, and the strengthening mechanisms at work in the Mg97Zn1Y2 extruded alloy are discussed. The existence of the LPSO phase strongly enhanced the refinement of Mg matrix grains during extrusion, which led to a large increase in yield stress through the Hall-Petch relationship. In addition, the LPSO phases, which were aligned along the direction of extrusion in the Mg97Zn1Y2 extruded alloy, acted as hardening phases, being roughly coordinated with the short-fiber reinforcement mechanism. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：6282 / 6293

页数：12

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