Computer-aided cooling curve thermal analysis and microstructural characterization of Mg-Gd-Y-Zr system alloys

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	Computer-aided cooling curve thermal analysis and microstructural characterization of Mg-Gd-Y-Zr system alloys
	J. L. Li; R. S. Chen; Y. Q. Ma; W. Ke
	2014
发表期刊	Thermochimica Acta
ISSN	0040-6031
卷号	590 页码:232-241
摘要	The solidification pathways of Mg-Gd-Y-Zr (GW) alloys with various Y and Gd concentrations were investigated by using a computer-aided cooling curve thermal analysis system, and the solidification microstructure and phase constitution of the investigated alloys were characterized by means of SEM, EDX, and XRD. The results show that the solidification microstructures of GW alloys are mainly composed of alpha-Mg matrix and eutectic Mg-24(Gd,Y)(5) phase, which forms through a univariant reaction: liq. -> alpha-Mg + Mg-24(Gd,Y)(5) during alloy solidification. Based upon thermal analysis results, the hot tearing susceptibility (HTS) and semi-solid formability of Mg-Gd-Y-Zr alloys were evaluated as well. It is predicted that the HTS of GW alloys first increases and then decreases with increasing Gd, Y content. Moreover, the increasing Gd, Y content also decreases the temperature sensitivity of solid fraction, -df(s)/dT, of GW alloys, and thus, improves the semi-solid formability of these alloys. (C) 2014 Elsevier B.V. All rights reserved.
部门归属	[li, jilin ; chen, rongshi ; ma, yuequn ; ke, wei] chinese acad sci, inst met res, grp magnesium & their applicat, shenyang 110016, peoples r china. ; chen, rs (reprint author), chinese acad sci, inst met res, grp magnesium & their applicat, 62 wencui rd, shenyang 110016, peoples r china. ; rschen@imr.ac.cn
关键词	Mg-gd-y-zr Alloy Thermal Analysis Solidification Pathways Phase Constitution Thermodynamic Predictions Solidification Pathways Mechanical-properties Phases Cast Zn Si
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73271
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. L. Li,R. S. Chen,Y. Q. Ma,et al. Computer-aided cooling curve thermal analysis and microstructural characterization of Mg-Gd-Y-Zr system alloys[J]. Thermochimica Acta,2014,590:232-241.
APA	J. L. Li,R. S. Chen,Y. Q. Ma,&W. Ke.(2014).Computer-aided cooling curve thermal analysis and microstructural characterization of Mg-Gd-Y-Zr system alloys.Thermochimica Acta,590,232-241.
MLA	J. L. Li,et al."Computer-aided cooling curve thermal analysis and microstructural characterization of Mg-Gd-Y-Zr system alloys".Thermochimica Acta 590(2014):232-241.