The effect of Bi addition on the microstructure and tensile properties of cast Al-15%Mg2Si composite

被引：7
|
作者：
Akrami, A. [1 ]
Emamy, M. [1 ]
Mousavian, H. [1 ]
机构：
[1] Univ Tehran, Coll Engn, Sch Met & Mat Engn, Tehran, Iran
来源：
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK | 2013年 / 44卷 / 05期
关键词：
Bismuth; Al-Mg2Si Composite; Morphology; Microstructure; Tensile properties; GROWTH; MG2SI; MELT;
D O I：
10.1002/mawe.201300147
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the current research, the influence of different concentrations of Bi (0.01-0.3 wt.%) on the microstructure and tensile properties of Al-15 wt.% Mg2Si in-situ metal matrix composite (MMC) has been investigated. It was found that 0.03 wt.% Bi changes the primary Mg2Si shape from large to irregular or dendritic to polyhedral shape. The average particle size of Mg2Si also decreases from 65 m to 20 m by adding 0.03% Bi. Microstructural observations by scanning electron microscope (SEM) also depicted that the morphology of the eutectic Mg2Si phase alters from flake-like to fine fiber or dot like. Further investigations on tensile testing revealed that the optimum amount of Bi level is 0.03% for improving both ultimate tensile test (UTS) and elongation values.
引用
收藏
页码：431 / 435
页数：5
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