Effect of Casting Modulus on Microstructure and Segregation in K441 Superalloy Casting

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	Effect of Casting Modulus on Microstructure and Segregation in K441 Superalloy Casting; Effect of Casting Modulus on Microstructure and Segregation in K441 Superalloy Casting
	W. G. Jiang; J. S. Dong; L. Wang; L. H. Lou
	2011 ; 2011
发表期刊	Journal of Materials Science & Technology ; Journal of Materials Science & Technology
ISSN	1005-0302 ; 1005-0302
卷号	27 期号:9 页码:831-840
摘要	Four castings with different modulus have been designed to simulate different thickness sections of a turbine blade during casting process. The microstructure has been observed by optical microscopy (OM) and scanning electron microscopy (SEM). The micro-segregation was tested by energy dispersive spectroscopy (EDS) and the macro-segregation was analyzed by using Metalscan 2500 spectrometers. The experimental results show that the microstructure of casting is affected by modulus apparently. The smaller the modulus, the finer the microstructure. The average grain size of castings with modulus of 0.29, 1.57, 3.16 and 5.0 mm is 0.3, 1.5, 2.7 and 4.3 mm, and the volume fraction of eutectic is 0, 0.1%, 0.2% and 1.0%, respectively. The micro/macro segregation is affected by the modulus apparently. The smaller the modulus, the lower the segregation level. When the modulus of casting increases, the content of Al increases, while the content of W, Cr and Mo decreases both in inner grain and near grain boundary. The content of Al and Mo in inner grain is higher than that near grain boundary, while the content of Cr and W in inner grain is lower than that near grain boundary.; Four castings with different modulus have been designed to simulate different thickness sections of a turbine blade during casting process. The microstructure has been observed by optical microscopy (OM) and scanning electron microscopy (SEM). The micro-segregation was tested by energy dispersive spectroscopy (EDS) and the macro-segregation was analyzed by using Metalscan 2500 spectrometers. The experimental results show that the microstructure of casting is affected by modulus apparently. The smaller the modulus, the finer the microstructure. The average grain size of castings with modulus of 0.29, 1.57, 3.16 and 5.0 mm is 0.3, 1.5, 2.7 and 4.3 mm, and the volume fraction of eutectic is 0, 0.1%, 0.2% and 1.0%, respectively. The micro/macro segregation is affected by the modulus apparently. The smaller the modulus, the lower the segregation level. When the modulus of casting increases, the content of Al increases, while the content of W, Cr and Mo decreases both in inner grain and near grain boundary. The content of Al and Mo in inner grain is higher than that near grain boundary, while the content of Cr and W in inner grain is lower than that near grain boundary.
部门归属	[jiang, weiguo; dong, jiasheng; wang, li; lou, langhong] chinese acad sci, inst met res, shenyang 110016, peoples r china.;jiang, wg (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;wgjiang@imr.ac.cn ; [jiang, weiguo; dong, jiasheng; wang, li; lou, langhong] chinese acad sci, inst met res, shenyang 110016, peoples r china.;jiang, wg (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;wgjiang@imr.ac.cn
关键词	Superalloy Superalloy Turbine Blade Turbine Blade Casting Modulus Casting Modulus Microstructure Microstructure Segregation Segregation Grain-boundary Segregation Grain-boundary Segregation Single-crystal Superalloy Single-crystal Superalloy Ni-base Ni-base Superalloy Superalloy Cooling Rate Cooling Rate Behaviors Behaviors
URL	查看原文 ; 查看原文
WOS记录号	WOS:000296116700011 ; WOS:000296116700011
引用统计	被引频次：12[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/321006/30424
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. G. Jiang,J. S. Dong,L. Wang,et al. Effect of Casting Modulus on Microstructure and Segregation in K441 Superalloy Casting, Effect of Casting Modulus on Microstructure and Segregation in K441 Superalloy Casting[J]. Journal of Materials Science & Technology, Journal of Materials Science & Technology,2011, 2011,27, 27(9):831-840, 831-840.
APA	W. G. Jiang,J. S. Dong,L. Wang,&L. H. Lou.(2011).Effect of Casting Modulus on Microstructure and Segregation in K441 Superalloy Casting.Journal of Materials Science & Technology,27(9),831-840.
MLA	W. G. Jiang,et al."Effect of Casting Modulus on Microstructure and Segregation in K441 Superalloy Casting".Journal of Materials Science & Technology 27.9(2011):831-840.