Method of Stray Grain Inhibition in the Platforms with Different Dimensions During Directional Solidification of a Ni-Base Superalloy

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	Method of Stray Grain Inhibition in the Platforms with Different Dimensions During Directional Solidification of a Ni-Base Superalloy
	X. B. Meng; J. G. Li; S. Z. Zhu; H. Q. Du; Z. H. Yuan; J. W. Wang; T. Jin; X. F. Sun; Z. Q. Hu
	2014
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	45A 期号:3 页码:1230-1237
摘要	A model of typical turbine blade shape with different platforms was designed to study the method of stray grain inhibition in the platforms by both experimental investigation and a ProCAST simulation based on a Cellular Automaton Finite Element model. The results show that stray grains with random orientations increasingly nucleate and grow in these platforms with the increase of platform dimension. To inhibit these stray grains, assistant bars are designed to introduce the primary grain into these platforms according to the theory of seeding method. The results indicate by the help of these assistant bars, the primary grain is introduced to the large dimensional platforms by developing secondary and tertiary dendrites, which form "crisscross" structure in these platforms. And, the stray grains in the large dimensional platforms are successfully and effectively inhibited. Further more, it is found that the thermal condition and the solidification sequence are changed in the large dimensional platforms by the use of assistant bars, which result in the introduction of primary grain and the inhibition of stray grains. Besides, the simulation results are in accordance with experimental findings.
部门归属	[meng, xiangbin ; li, jinguo ; jin, tao ; sun, xiaofeng ; hu, zhuangqi] chinese acad sci, inst met res, shenyang 110016, peoples r china. [meng, xiangbin] xian aeroengine grp corp ltd, aviat ind corp china avic, xian 710021, peoples r china. [zhu, shizhe ; du, hongqiang] shenyang liming aeroengine grp corp ltd, aviat ind corp china avic, xian 110043, peoples r china. [yuan, zhonghua ; wang, junwu] guiyang liyang aeroengine grp corp ltd, aviat ind corp china avic, guiyang 550002, peoples r china. ; meng, xb (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; xbmeng@imr.ac.cn ; jgli@imr.ac.cn
关键词	Single-crystal Superalloy Low-angle Boundaries Freckle Formation Spiral Selector Turbine-blades Growth Simulation Castings Prediction Mechanism
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/321006/72565
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. B. Meng,J. G. Li,S. Z. Zhu,et al. Method of Stray Grain Inhibition in the Platforms with Different Dimensions During Directional Solidification of a Ni-Base Superalloy[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2014,45A(3):1230-1237.
APA	X. B. Meng.,J. G. Li.,S. Z. Zhu.,H. Q. Du.,Z. H. Yuan.,...&Z. Q. Hu.(2014).Method of Stray Grain Inhibition in the Platforms with Different Dimensions During Directional Solidification of a Ni-Base Superalloy.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,45A(3),1230-1237.
MLA	X. B. Meng,et al."Method of Stray Grain Inhibition in the Platforms with Different Dimensions During Directional Solidification of a Ni-Base Superalloy".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 45A.3(2014):1230-1237.