Thermal analysis and solidification pathways of Mg-Al-Ca system alloys

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	Thermal analysis and solidification pathways of Mg-Al-Ca system alloys
	S. M. Liang; R. S. Chen; J. J. Blandin; M. Suery; E. H. Han
	2008
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	480 期号:1-2 页码:365-372
摘要	Mg-Al-Ca alloys are creep resistant magnesium alloys with high application potentials. The solidification pathways and microstructure formation in this alloy system are still under discussion. In this paper, the solidification behavior of AZ91 and AM50 with Ca addition (AZC91x and AMC50x alloys) was investigated by a computer-aided cooling curve analysis (CA-CCA) system. Microstructure and phase identification were carried out by SEM and EDX analysis. The results show that the Ca-containing phase formation mainly depends on Ca content and Ca/Al ratio. With increasing the Ca/Al ratio these phases transform from Al2Ca to (Mg, Al)(2)Ca and Mg2Ca. Moreover, Ca addition decreases the liquidus temperature of Mg-Al alloys, but influences the solidus temperature in a more complex way. Increasing the Ca content also decreases the solid fraction at which dendrite coherency occurs. The relationship between solidification interval, dendrite coherency point, formation of Ca-containing phases and hot tearing is also discussed. (C) 2007 Elsevier B.V. All rights reserved.
部门归属	[liang, s. m.; chen, r. s.; han, e. h.] chinese acad sci, environm corros ctr, inst met res, shenyang 110016, peoples r china. [blandin, j. j.; suery, m.] ujf, cnrs, inpg, simap,gpm2,umr 5266, f-38402 st martin dheres, france. [liang, s. m.] chinese acad sci, grad sch, beijing 100864, peoples r china.;chen, rs (reprint author), chinese acad sci, environm corros ctr, inst met res, 62 wencui rd, shenyang 110016, peoples r china;smliang@imr.ac.cn rschen@imr.ac.cn
关键词	Mg-al-ca Alloys Microstructural Formation Solidification Pathway Thermal Analysis Mechanical-properties Thermodynamic Calculation Elevated-temperature Dendrite Coherency Phase-equilibria Magnesium Alloy Az91d Alloy Laves-phase Microstructure Creep
URL	查看原文
WOS记录号	WOS:000255881300048
引用统计	被引频次：132[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/321006/32919
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. M. Liang,R. S. Chen,J. J. Blandin,et al. Thermal analysis and solidification pathways of Mg-Al-Ca system alloys[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,480(1-2):365-372.
APA	S. M. Liang,R. S. Chen,J. J. Blandin,M. Suery,&E. H. Han.(2008).Thermal analysis and solidification pathways of Mg-Al-Ca system alloys.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,480(1-2),365-372.
MLA	S. M. Liang,et al."Thermal analysis and solidification pathways of Mg-Al-Ca system alloys".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 480.1-2(2008):365-372.