Prediction of Shrinkage Microporosity in Gravity-Cast and Low-Pressure Sand-Cast Mg-6Gd-3Y-0.5Zr Magnesium Alloys

doi:10.1002/adem.201900755

CORC > 金属研究所 > 中国科学院金属研究所

	Prediction of Shrinkage Microporosity in Gravity-Cast and Low-Pressure Sand-Cast Mg-6Gd-3Y-0.5Zr Magnesium Alloys
	Zhou, Bo 1,2; Wu, Di 1; Chen, Rongshi 1; Han, En-Hou 1
刊名	ADVANCED ENGINEERING MATERIALS
	2019-10-22
页码	10
关键词	dimensionless Niyama criterion low-pressure sand castings Mg-6Gd-3Y-0 5Zr magnesium alloys Niyama criterion shrinkage microporosities
ISSN号	1438-1656
DOI	10.1002/adem.201900755
通讯作者	Wu, Di(dwu@imr.ac.cn) ; Chen, Rongshi(rschen@imr.ac.cn)
英文摘要	The Niyama criterion and the dimensionless Niyama criterion are used to predict shrinkage microporosity in Mg-6Gd-3Y-0.5Zr magnesium plates processed by gravity casting and low-pressure sand casting. Instead of the Niyama evaluation condition recommended by commercial ProCAST software and precious studies, the most appropriate Niyama evaluation condition is suggested as fraction solid of 0.7 for the investigated alloys. With consideration of the actual distribution of shrinkage microporosity and the definition of unsound samples (shrinkage microporosity volume fraction is higher than 1% based on the tensile test), the corresponding threshold Niyama values are qualitatively determined as 0.44 and 0.3 degrees C-0.5 s(0.5) mm(-1) for gravity-cast and low-pressure sand-cast plates, respectively. It indicates that exerting pressure contributes to the decrease in the threshold Niyama value. In addition, exerting pressure can reduce the amount of shrinkage microporosity. For the dimensionless Niyama criterion, it is capable to quantitatively predict the shrinkage microporosity volume fraction in low microporosity-containing regions, but not in high microporosity-containing regions.
资助项目	National Science and Technology Major Project[2017ZX04014001] ; National Key Research and Development Program of China[2016YFB0301104] ; National Natural Science Foundation of China (NSFC)[51531002] ; National Natural Science Foundation of China (NSFC)[51301173] ; National Natural Science Foundation of China (NSFC)[51601193] ; National Natural Science Foundation of China (NSFC)[51701218] ; Natural Science Foundation of Liaoning province[20180550799]
WOS研究方向	Materials Science
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000491834600001
资助机构	National Science and Technology Major Project ; National Key Research and Development Program of China ; National Natural Science Foundation of China (NSFC) ; Natural Science Foundation of Liaoning province
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136800]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wu, Di; Chen, Rongshi
作者单位	1.Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 19 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Bo,Wu, Di,Chen, Rongshi,et al. Prediction of Shrinkage Microporosity in Gravity-Cast and Low-Pressure Sand-Cast Mg-6Gd-3Y-0.5Zr Magnesium Alloys[J]. ADVANCED ENGINEERING MATERIALS,2019:10.
APA	Zhou, Bo,Wu, Di,Chen, Rongshi,&Han, En-Hou.(2019).Prediction of Shrinkage Microporosity in Gravity-Cast and Low-Pressure Sand-Cast Mg-6Gd-3Y-0.5Zr Magnesium Alloys.ADVANCED ENGINEERING MATERIALS,10.
MLA	Zhou, Bo,et al."Prediction of Shrinkage Microporosity in Gravity-Cast and Low-Pressure Sand-Cast Mg-6Gd-3Y-0.5Zr Magnesium Alloys".ADVANCED ENGINEERING MATERIALS (2019):10.