The effects of boron additions on the microstructure, hardness and tensile properties of in situ Al-15%Mg2Si composite

被引：24
|
作者：
Azarbarmas, Mortaza [1 ]
Emamy, Masoud [1 ]
Karamouz, Mostafa [1 ]
Alipour, Mohammad [1 ]
Rassizadehghani, Jafar [1 ]
机构：
[1] Univ Tehran, Sch Met & Mat, Tehran, Iran
来源：
MATERIALS & DESIGN | 2011年 / 32卷 / 10期
关键词：
MG2SI; AL-MG2SI; KBF4;
D O I：
10.1016/j.matdes.2011.05.036
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work the influences of Boron (B) content on the microstructure, hardness and mechanical properties of Al-15%Mg2Si composite were investigated. The results showed that with the increase of B content, the average size of primary Mg2Si particles decreased from similar to 23 to similar to 5 mu m and the volume fraction of them decreased too, but the amount of alpha phase increased. It was found that with the addition of 0.3%B, the ultimate tensile strength (UTS) and elongation values reached from 252 to 273 MPa and 2.2% to 3.7%, respectively. It was revealed from hardness tests that B decreases the hardness values of the composite. Also, a small amount of Boride compounds formed as a result of the addition of B, which were the main reason of the decreasing of tensile properties at samples with high B. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5049 / 5054
页数：6
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