Effect of complex alloying of Sc, Zr and Ti on the microstructure and mechanical properties of Al-5Mg alloys

被引：33

作者：

Liu, Zhongxia ^{[1
]}

Li, Zijiong ^{[1
]}

Wang, Mingxing ^{[1
]}

Weng, Yonggang ^{[1
]}

机构：

[1] Zhengzhou Univ, Sch Phys Sci & Engn, Key Lab Mat Phys, Minist Educ China, Zhengzhou 450052, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 483-84卷 / 1-2 C期

关键词：

complex alloying of Sc; Zr and Ti; grain refinement; recrystallization resistance; mechanical properties;

D O I：

10.1016/j.msea.2006.09.166

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of complex alloying of Sc, Zr and Ti on the microstructure, recrystallization resistance and mechanical properties of Al-5Mg alloys is investigated. The complex alloying of Sc, Zr and Ti refines the grain size of Al-5Mg alloys to 62 mu m, which is only half the size that of the alloy containing only Sc. The recrystallization temperature rises from 250 to about 450 degrees C. The yield strength increases from 135 to 250 MPa, which is close to the ultimate tensile strength of Al-5Mg. Ultimate tensile strength values above 390 MPa can be obtained, which are 40% larger than that of Al-5Mg. Though the uniform elongation of alloys decreases from 30 to 17%, the ductility is still excellent. The reason is that the complex alloying of Sc, Zr and Ti decreases the eutectic composition of Al-Al(3)SC, which is favorable to the formation and stablization of primary and secondary complex particles such as Al(3)(Sc(1-x),Zr(x)), Al(3)(Sc(1-x)Ti(x)). These particles not only increase the heterogeneous nucleation of the alpha-phase in melt but also effectively pin dislocations, grain boundaries or sub-boundaries. (c) 2007 Published by Elsevier B.V.

引用

页码：120 / 122

页数：3

共 8 条

[1] Scientific principles of making an alloying addition of scandium to aluminium alloys [J].

Davydov, VG ;

Rostova, TD ;

Zakharov, VV ;

Filatov, YA ;

Yelagin, VI .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 280 (01) :30-36

[2] New Al-Mg-Sc alloys [J].

Filatov, YA ;

Yelagin, VI ;

Zakharov, VV .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 280 (01) :97-101

[3] Microstructure of Al3Sc with ternary transition-metal additions [J].

Harada, Y ;

Dunand, DC .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 329 :686-695

[4] Interaction of recrystallization and precipitation:: The effect of Al3SC on the recrystallization behaviour of deformed aluminium [J].

Jones, MJ ;

Humphreys, FJ .

ACTA MATERIALIA, 2003, 51 (08) :2149-2159

[5] Strengthening mechanisms of an Al-Mg-Sc-Zr alloy [J].

Kendig, KL ;

Miracle, DB .

ACTA MATERIALIA, 2002, 50 (16) :4165-4175

[6] The effect of scandium on the microstructure, mechanical properties and weldability of a cast Al-Mg alloy [J].

Lathabai, S ;

Lloyd, PG .

ACTA MATERIALIA, 2002, 50 (17) :4275-4292

[7] Resistance to recrystallization due to Sc and Zr addition to Al-Mg alloys [J].

Ocenasek, V ;

Slamova, M .

MATERIALS CHARACTERIZATION, 2001, 47 (02) :157-162

[8] Effect of minor Sc and Zr on the microstructure and mechanical properties of Al-Mg based alloys [J].

Yin, ZM ;

Pan, QL ;

Zhang, YH ;

Jiang, F .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 280 (01) :151-155

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