Microstructure and mechanical properties of Mg-Gd-Y-Zr alloy cast by metal mould and lost foam casting

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	Microstructure and mechanical properties of Mg-Gd-Y-Zr alloy cast by metal mould and lost foam casting
	J. L. Li; R. S. Chen; W. Ke
	2011
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	21 期号:4 页码:761-766
摘要	The microstructure and mechanical properties of Mg-10.1Gd-3.74Y-0.25Zr (mass fraction, %) alloy (GW104 alloy) cast by metal mould casting (MMC) and lost foam casting (LFC) were evaluated, respectively. It is revealed that different forming modes do not influence the phase composition of as-cast alloy. In the as-cast specimens, the microstructures are similar and composed of alpha-Mg solid solution, eutectic compound of alpha-Mg+Mg(24)(Gd, Y)(5) and cuboid-shaped Mg(5)(Gd, Y) phase; whereas the average grain size of the alloy produced by metal mould casting is smaller than that by lost foam casting. The eutectic compound of the alloy is completely dissolved after solution treatment at 525 degrees C for 6 h, while the Mg5(Gd, Y) phase still exists after solution treatment. After peak-ageing, the lost foam cast alloy exhibits the maximum ultimate tensile strength of 285 MPa, and metal mould cast specimen 325 MPa at room temperature, while the tensile yield strengths of them are comparable. It can be concluded that GW104 alloy cast by lost foam casting possesses similar microstructure and evidently lower mechanical strength compared with metal mould cast alloy, due to slow solidification rate and proneness to form shrinkage porosities during lost foam casting process.
部门归属	[li ji-lin; chen rong-shi; ke wei] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;chen, rs (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;rschen@imr.ac.cn
关键词	Mg-gd-y-zr Alloy Lost Foam Casting Metal Mould Casting Microstructure Mechanical Property Age-hardening Response Tensile Properties
URL	查看原文
WOS记录号	WOS:000290515800009
引用统计	被引频次：35[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/321006/30469
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,W. Ke. Microstructure and mechanical properties of Mg-Gd-Y-Zr alloy cast by metal mould and lost foam casting[J]. Transactions of Nonferrous Metals Society of China,2011,21(4):761-766.
APA	J. L. Li,R. S. Chen,&W. Ke.(2011).Microstructure and mechanical properties of Mg-Gd-Y-Zr alloy cast by metal mould and lost foam casting.Transactions of Nonferrous Metals Society of China,21(4),761-766.
MLA	J. L. Li,et al."Microstructure and mechanical properties of Mg-Gd-Y-Zr alloy cast by metal mould and lost foam casting".Transactions of Nonferrous Metals Society of China 21.4(2011):761-766.