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
刊名	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
	2008
卷号	39A 期号:5 页码:1225-1235
关键词	nanostructure-dendrite composite glass-forming ability mechanical-properties amorphous-alloys phase-equilibria metallic glasses ternary-system microstructure plasticity solidification
ISSN号	1073-5623
中文摘要	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.
原文出处	://WOS:000254776700027
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/33073]
专题	金属研究所_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.