Microstructure and compressive properties of chill-cast Mg-Al-Ca alloys

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	Microstructure and compressive properties of chill-cast Mg-Al-Ca alloys
	L. L. Shi; H. Ma; T. Liu; J. Xu; E. Ma
	2006
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	21 期号:3 页码:613-622
摘要	Mg(82)Al(8)Ca(10) was determined to be a pseudo-binary eutectic composition [liquid solidifying into alpha-Mg and (Mg,Al)(2)Ca in the Mg-Al-Ca ternary system with a eutectic melting temperature of 789 K]. A series of Mg(x)(Al(0.44)Ca(0.56))(100-x) alloys, where 75 <= x <= 95, were cast into Phi 4 mm rods using copper mold casting. The eutectic alloy exhibits the highest fracture strength, sigma(f) = 609 MPa. For 75 <= x <= 79, the alloys have hypereutectic microstructures with Mg(2)Ca as the primary phase, and a, is reduced together with diminishing plasticity. For hypoeutectic alloys with 86 <= x <= 95, the volume fraction of the primary alpha-Mg dendrites dispersed in the eutectic matrix increases with increasing x, resulting in a gradual decrease of the yield and fracture strengths but improved plastic strain to as large as 9%. The refined microstructures created in bulk samples via chill casting can lead to a good combination of strength and plasticity, with specific strength superior to commercial Mg alloys.
部门归属	johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa. chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china.;ma, e (reprint author), johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa;ema@jhu.edu
关键词	Bulk Metallic-glass Nanostructure-dendrite Composite Mechanical-properties Amorphous-alloys Forming Ability Thermal-stability Phase-equilibria Air Atmosphere Plasticity Fabrication
URL	查看原文
WOS记录号	WOS:000235785900010
引用统计	被引频次：33[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/321006/34456
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. L. Shi,H. Ma,T. Liu,et al. Microstructure and compressive properties of chill-cast Mg-Al-Ca alloys[J]. Journal of Materials Research,2006,21(3):613-622.
APA	L. L. Shi,H. Ma,T. Liu,J. Xu,&E. Ma.(2006).Microstructure and compressive properties of chill-cast Mg-Al-Ca alloys.Journal of Materials Research,21(3),613-622.
MLA	L. L. Shi,et al."Microstructure and compressive properties of chill-cast Mg-Al-Ca alloys".Journal of Materials Research 21.3(2006):613-622.