Effects of Al addition on microstructure and mechanical properties of Mg-Zn-Y alloys

被引：0

作者：

Lim, HK ^{[1
]}

Lee, JY ^{[1
]}

Kim, WT ^{[1
]}

Kim, DH ^{[1
]}

机构：

[1] Yonsei Univ, Dept Met, Ctr Noncrystalline Mat, Seodaemun Gu, Seoul 120749, South Korea

来源：

MAGNESIUM TECHNOLOGY 2005 | 2005年

关键词：

Mg-Zn-Y alloy; icosahedral quasi crystalline phase; microstructure; mechanical properties;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Microstructures and mechanical properties of Mg-Zn-Y and Mg-Zn-Al-Y alloys have been investigated to find the optimum Zn/Y ratio for the formation of two-phase microstructures consisting of alpha-Mg and icosahedral phase, as well as to enhance the aging characteristics of Mg-Zn-Y alloys by the addition of aluminum. The optimum range of Zn/Y ratio for the two-phase microstructure of a-Mg and I-phase is 3 similar to 5. With a decreasing amount of icosahedral phase in the Mg-Zn-Y alloys, the compressive yield stress decreased. The strengthening effect of the icosahedral phase is explained to originate from the low energy interface between the icosahedral phase and a-Mg matrix. Hardness measurement shows that the aging response is improved when Al is added to the Mg-Zn-Y alloy. Although the At containing alloy shows higher strength level in the peak-aged condition than Mg-Zn-Y alloy, the ductility increase is marginal possibly due to the decreased fraction of icosahedral phase particles and fort-nation of intermetallic compound during heat treatment.

引用

页码：281 / 283

页数：3

共 11 条

[1] Deformation behavior of Mg-Zn-Y alloys reinforced by icosahedral quasicrystalline particles [J].

Bae, DH ;

Kim, SH ;

Kim, DH ;

Kim, WT .

ACTA MATERIALIA, 2002, 50 (09) :2343-2356

[2] Application of quasicrystalline particles as a strengthening phase in Mg-Zn-Y alloys [J].

Bae, DH ;

Lee, MH ;

Kim, KT ;

Kim, WT ;

Kim, DH .

JOURNAL OF ALLOYS AND COMPOUNDS, 2002, 342 (1-2) :445-450

[3]

CAHN RW, 1996, MAT SCI TECHNOLOGY, V8, P113

[4]

DUBOIS JM, 1997, P 6 INT C QUAS SING

[5]

Janot C, 1994, Quasicrystals

[6] Precipitates in a Mg-Zn-Y alloy reinforced by an icosahedral quasicrystalline phase [J].

Kim, IJ ;

Bae, DH ;

Kim, DH .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 359 (1-2) :313-318

[7]

PARK ES, 2001, P MRS FAL M BOST

[8]

SCHUMANN S, 2003, MATER SCI FORUM, V51, P419

[9] Quasicrystal strengthened Mg-Zn-Y alloys by extrusion [J].

Singh, A ;

Nakamura, M ;

Wantanabe, M ;

Kato, A ;

Tsai, AP .

SCRIPTA MATERIALIA, 2003, 49 (05) :417-422

[10] On the cubic W phase and its relationship to the icosahedral phase in Mg-Zn-Y alloys [J].

Singh, A ;

Tsai, AP .

SCRIPTA MATERIALIA, 2003, 49 (02) :143-148

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