Effects of La addition on the microstructure and tensile properties of Al-Si-Cu-Mg casting alloys

被引：0
|
作者：
Tao Lu [1 ,2 ]
Ye Pan [1 ,2 ]
Ji-li Wu [1 ,2 ]
Shi-wen Tao [1 ,2 ]
Yu Chen [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Southeast University
[2] Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University
来源：
International Journal of Minerals,Metallurgy and Materials | 2015年 / 22卷 / 04期
关键词：
aluminum silicon alloys; rare earth addition; lanthanum; microstructure; tensile properties; precipitates;
D O I：
暂无
中图分类号：
TG292 [轻金属铸造]; TG146.21 [];
学科分类号：
080201 ; 080502 ; 080503 ;
摘要：
The effects of La addition on the microstructure and tensile properties of B-refined and Sr-modified Al-11Si-1.5Cu-0.3Mg casting alloys were investigated. With a trace addition of La(0.05wt%-0.1wt%), the mutual poisoning effect between B and Sr can be neutralized by the formation of La B6 rather than Sr B6. By employing a La/B weight ratio of 2:1, uniform microstructures, which are characterized by well refined α-Al grains and adequately modified eutectic Si particles as well as the incorporation of precipitated strengthening intermetallics, are obtained and lead to appreciable tensile properties with an ultimate tensile strength of 270 MPa and elongation of 5.8%.
引用
收藏
页码：405 / 410
页数：6
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