Effects of La and Nd Co-addition on Microstructure and Mechanical Properties of As-Cast AZ91 Magnesium Alloy

被引：0

作者：

Zhao Yuanhua ^{[1
]}

Chen Yungui ^{[1
]}

Zhao Dong ^{[1
]}

Xiao Sufen ^{[1
]}

Tang Yongbai ^{[1
]}

Wei Shanghai ^{[1
]}

Zhang Xiaoping ^{[1
]}

Wang Qing ^{[1
]}

机构：

[1] Sichuan Univ, Sch Mat Sci & Engn, Chengdu 610065, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2010年 / 39卷 / 08期

关键词：

AZ91 magnesium alloy; La; Nd; microstructure; mechanical properties;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructures and phase composition of as-cast AZ91 magnesium alloys with addition of 2.5wt% RE (RE=La, La and Nd or Nd) in total were investigated by SEM/EDS and XRD. The mechanical properties of the alloys were analyzed at room temperature. The results show that the beta-Mg(17)Al(12) amount of AZ91 alloy is decreased evidently with the 2.5wt% addition of RE. The Al-RE phases of Mg-9Al-1Zn-2.5La and Mg-9Al-1Zn-2.5Nd are acicular Al(11)La(3) and particle-like Al(2)Nd, respectively. Both Al(11)La(3) and Al(2)Nd are formed with co-addition of La and Nd, whose sizes are smaller than those of single addition. The relative content of the two Al-RE phases is proportional to the addition content of La and Nd. Part of La in Al(11)La(3) or Nd in Al(2)Nd is substituted by Nd or La respectively when La and Nd are co-added into AZ91 alloy. Compared with single addition of La or Nd, co-addition can improve the mechanical properties of as-cast AZ91 alloy more significantly. In all magnesium alloys investigated, the Mg-9Al-1Zn-1.0La-1.5Nd alloy exhibits the best mechanical properties, whose UTS is 235 MPa and delta is 10% at room temperature.

引用

页码：1470 / 1474

页数：5

共 9 条

[1] Cui YX., 1998, ANAL METAL FRACTURE
[2] DING W J, 2007, Science and technology of magnesium alloys M
[3] Fan Y, 2006, ACTA METALL SIN, V42, P35
[4] Huang ZG, 2005, RARE METAL MAT ENG, V34, P375
[5] Effect of rare-earth element additions on high-temperature mechanical properties of AZ91 magnesium alloy
Khomamizadeh, F
Nami, B
Khoshkhooei, S
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (12): : 3489 - 3494
[6] Liu Sheng-fa, 2006, Chinese Journal of Nonferrous Metals, V16, P464
[7] Pei L. X., 2005, RES STUDIES FOUNDRY, P20
[8] SONG YL, 2008, J JILIN U ENG TECHNO, V37, P62
[9] Effect of yttrium and cerium addition on microstructure and mechanical properties of AM50 magnesium alloy
Wang Mingxing
Zhou Hong
Wang Lin
[J]. JOURNAL OF RARE EARTHS, 2007, 25 (02) : 233 - 237

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