Evolution of microstructure in eutectic Al-Si alloys

被引：0

作者：

Kori, SA ^{[1
]}

Murty, BS ^{[1
]}

Chakraborty, M ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India

来源：

INTERNATIONAL CONFERENCE ON SOLIDIFICATION SCIENCE AND PROCESSING: OUTLOOK FOR THE 21ST CENTURY | 2001年

关键词：

grain refinement; modification; characterization; Al-Si alloys; microstructural characterization;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In the present paper, the combined grain refinement and modification effects on the morphology of alpha-Al dendrites and on the eutectic Si respectively have been investigated in Al-12Si and LM-6 alloys. Indigenously developed Al-1Ti-M (M13) and Al-5Ti-1B (M51) master alloys were used as grain refiner and Sr was used as a modifier. In addition, influence of various addition levels of Mg was studied individually and in combination with M13 master alloy on AM 2Si alloy. The results suggest that, addition of Mg can counteract the poisoning effect of Si in AM 2Si alloy. Results also suggest that, both refinement of alpha-Al (elongated to equiaxed dendrites) and modification of eutectic Si (elongated plates to fine particles) are possible in Al-12Si and LM-6 alloys when combined addition of grain refiner and modifier are made to the melt and resulting in improved mechanical properties.

引用

页码：109 / 121

页数：13

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