Microstructural development of Al-15wt.%Mg2Si in situ composite with mischmetal addition

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	Microstructural development of Al-15wt.%Mg2Si in situ composite with mischmetal addition
	J. Zhang; Z. Fan; Y. Q. Wang; B. L. Zhou
	2000
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	281 期号:1-2 页码:104-112
摘要	In situ Al-Mg2Si composites, as a new class of ultralight materials for aerospace and other advanced engineering applications, are attracting more and more attention of both material scientists and design engineers. It has been demonstrated in our previous work that with proper microstructural control, in situ Al-Mg2Si composites can offer very promising combinations of strength, ductility and fracture toughness. In the present work, the effects of mischmetal (MM, a mixture of rare-earth, RE elements) additions on the microstructural development of an in situ Al-15wt.%Mg2Si composite were investigated. It was found that with increasing MM additions in the composites. the size of primary Mg2Si particles was considerably reduced, and that the pseudo-eutectic Mg2Si was changed from a fibrous morphology to a flake-like morphology, showing a divorced character. A small amount of RE-containing compounds in the form of Al11RE3 were formed as a result of MM additions. It is believed that MM additions have a strong influence on the nucleation process of primary Mg2Si particles and the subsequent formation of the alpha-Al phase and the pseudo-eutectic matrix. (C) 2000 Elsevier Science S.A. All rights reserved.
部门归属	brunel univ, dept mat engn, uxbridge ub8 3ph, middx, england. chinese acad sci, inst met res, shenyang 110015, peoples r china.;zhang, j (reprint author), brunel univ, dept mat engn, uxbridge ub8 3ph, middx, england
关键词	Microstructure Composites Al Alloy Composite Casting Intermetallic Mg2si-al Alloys Strain-rate Superplasticity Silicon Eutectic Alloys Mechanical-properties Matrix Composites Solidification Temperature Strength
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WOS记录号	WOS:000085884600014
引用统计	被引频次：231[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37245
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Zhang,Z. Fan,Y. Q. Wang,et al. Microstructural development of Al-15wt.%Mg2Si in situ composite with mischmetal addition[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2000,281(1-2):104-112.
APA	J. Zhang,Z. Fan,Y. Q. Wang,&B. L. Zhou.(2000).Microstructural development of Al-15wt.%Mg2Si in situ composite with mischmetal addition.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,281(1-2),104-112.
MLA	J. Zhang,et al."Microstructural development of Al-15wt.%Mg2Si in situ composite with mischmetal addition".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 281.1-2(2000):104-112.