Fracture behavior of high strength Mg-Gd-Y-Zr magnesium alloy

IMR OpenIR

	Fracture behavior of high strength Mg-Gd-Y-Zr magnesium alloy
	L. Gao; R. S. Chen; E. H. Han
	2010
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	20 期号:7 页码:1217-1221
摘要	The fracture behavior of a permanent mould casting Mg-8.57Gd-3.72Y-0.54Zr (mass fraction, %) (GW94) alloy was investigated under different thermal conditions, including as-cast, solution-treated, peak-aged, and over-aged states. Scanning electron microscopy (SEM) and optical microscopy (OM) were employed to examine the crack nucleation and fracture model. The results indicate that the GW94 alloy shows different behaviors of crack initiation and fracture under different thermal conditions. During tensile test at room temperature, the fracture model of the as-cast GW94 alloy is quasi-cleavage, while that of the solution-treated alloy is transgranular cleavage. It is a mixed pattern of transgranular and intergranular fracture for both the aged conditions. Large cavities formed at grain boundaries are observed in the peak-aged sample tested at 300 degrees C, corresponding to the intergranular fracture. Localized plastic deformation at grain boundaries is also observed and corresponds to the high elongation at 300 degrees C.
部门归属	[gao lei; chen rong-shi; han en-hou] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. [gao lei] chinese acad sci, grad sch, beijing 100039, peoples r china.;han, eh (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;rongshichen@yahoo.com ehhan@imr.ac.cn
关键词	Magnesium Alloy Rare Earth Mg-gd-y Alloys Mechanical Properties Fracture Behavior Heat Treatment Mechanical-properties Wt.percent Alloy Zn Additions Microstructures 250-degrees-c Precipitation
URL	查看原文
WOS记录号	WOS:000280747200007
引用统计	被引频次：16[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/321006/31114
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Gao,R. S. Chen,E. H. Han. Fracture behavior of high strength Mg-Gd-Y-Zr magnesium alloy[J]. Transactions of Nonferrous Metals Society of China,2010,20(7):1217-1221.
APA	L. Gao,R. S. Chen,&E. H. Han.(2010).Fracture behavior of high strength Mg-Gd-Y-Zr magnesium alloy.Transactions of Nonferrous Metals Society of China,20(7),1217-1221.
MLA	L. Gao,et al."Fracture behavior of high strength Mg-Gd-Y-Zr magnesium alloy".Transactions of Nonferrous Metals Society of China 20.7(2010):1217-1221.