The influence of pure Na on the microstructure and tensile properties of Al-Mg2Si metal matrix composite

被引：83
|
作者：
Emamy, M. [1 ]
Khorshidi, R. [2 ]
Raouf, A. Honarbakhsh [2 ]
机构：
[1] Univ Tehran, Sch Met & Mat, Tehran 113654563, Iran
[2] Semnan Univ, Fac Engn, Dept Mat, Semnan, Iran
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 13-14期
关键词：
Mechanical characterization; Al/Mg2Si composites; Casting; Fracture; GROWTH; SILICON; MG2SI;
D O I：
10.1016/j.msea.2011.02.010
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In current research, the influence of different concentrations of Na (0.01-0.2 wt.%) on the microstructure and tensile properties of Al-15 wt.%Mg2Si in situ metal matrix composite has been investigated. It was found that 0.1 wt.% Na addition changes the morphology of primary Mg2Si irregular or dendritic to polyhedral shape and its average particle size decreases from 32 mu m to 7 mu m. Microstructural studies also showed that the morphology of the eutectic Mg2Si phase alters from flake-like to very short fibrous or dot-like. Further investigations on tensile tests revealed optimum Na level (0.1%) for improving both UTS and elongation values. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：4337 / 4342
页数：6
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