Mg-Al-CaIn-Situ composites with a refined eutectic structure and their compressive properties

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	Mg-Al-CaIn-Situ composites with a refined eutectic structure and their compressive properties
	L. L. Shi; J. Xu; E. Ma
	2008
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	39A 期号:5 页码:1225-1235
摘要	In a series of Mg (x) (Al(2)Ca)(100-x) (76 <= x <= 87) ternary alloys near the Mg-(Mg,Al)(2)Ca pseudo-binary eutectic point, different phases and morphologies based on ultrafine eutectic microstructure have been obtained by controlling the composition and changing the cooling rate via either induction melting or copper mold casting. For 81 <= x <= 87, the chill-cast alloys with ductile Mg dendrites embedded in an ultrafine [Mg + (Mg,Al)(2)Ca] eutectic matrix exhibit gradually increased fracture strength from 415 to 491 MPa with the decrease of Mg content. At x = 79, the Mg(79)Al(14)Ca(7) alloy contains hard (Mg,Al)(2)Ca precipitates coexisting with ductile Mg dendrite, dispersed in the strong eutectic matrix. This alloy exhibits the highest compressive fracture strength (600 MPa), and the specific strength reaches 3.4 x 10(5) N center dot m center dot kg(-1). The alloys all exhibit substantial plastic strain (5 to 6 pct). The attainment of such a combination of strength and plasticity is an interesting and useful step in improving the mechanical properties of lightweight Mg alloys.
部门归属	[shi, ling-ling; xu, jian] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [ma, evan] johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa.;shi, ll (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;jianxu@imr.ac.cn
关键词	Nanostructure-dendrite Composite Glass-forming Ability Mechanical-properties Amorphous-alloys Phase-equilibria Metallic Glasses Ternary-system Microstructure Plasticity Solidification
URL	查看原文
WOS记录号	WOS:000254776700027
引用统计	被引频次：21[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/321006/33073
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. L. Shi,J. Xu,E. Ma. Mg-Al-CaIn-Situ composites with a refined eutectic structure and their compressive properties[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2008,39A(5):1225-1235.
APA	L. L. Shi,J. Xu,&E. Ma.(2008).Mg-Al-CaIn-Situ composites with a refined eutectic structure and their compressive properties.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,39A(5),1225-1235.
MLA	L. L. Shi,et al."Mg-Al-CaIn-Situ composites with a refined eutectic structure and their compressive properties".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 39A.5(2008):1225-1235.