Formation and Evolution of Low Angle Grain Boundary in Large-Scale Single Crystal Superalloy Blade

doi:10.11900/0412.1961.2019.00090

IMR OpenIR

	Formation and Evolution of Low Angle Grain Boundary in Large-Scale Single Crystal Superalloy Blade
	Xie Guang; Zhang Shaohua; Zheng Wei; Zhang Gong; Shen Jian; Lu Yuzhang; Hao Hongquan; Wang Li; Lou Langhong; Zhang Jian
通讯作者	Xie Guang(gxie@imr.ac.cn)
	2019-12-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	55 期号:12 页码:1527-1536
摘要	Ni-based single crystal (SX) superalloys are widely used for production of blades in gas turbines and aircraft engines for their superior mechanical performance at high temperatures. In this work, the formation and evolution of low angle grain boundary (LAGB) of a SX blade during directionally solified (DS) process were investigated by EBSD and XCT. It indicated that the alignment of dendrites was deteriorated with the increasing of the height along the growth direction during the DS process of SX blade. LAGBs were found in the SX blade. The misorientation angle and the frequency of LAGB were obviously enhanced with the increasing of the distance away from the initiated location of LAGB. Crystal orientation measurements showed that the orientation distribution of dendrites in the extended zone was concentrated, while the dispersion of dendrite orientation in the blade body increased, but it was still around that of the extended zone. The reason for the formation of LAGB may be related to the shell hin-dering the melt shrinkage which resulted in the production of the force and then led to the rotation of secondary dendrites. Larger size voids on the surface would be beneficial to the formation of LAGB. In addition, it was found that dendrites with the orientation approching [001] eliminated the stray grains between them and impinged to form LAGB.
关键词	large-scale single crystal superalloy blade low angle grain boundary dendrite orientation XCT
资助者	National Natural Science Foundation of China ; National Science and Technology Major Project
DOI	10.11900/0412.1961.2019.00090
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51771204] ; National Natural Science Foundation of China[U1732131] ; National Natural Science Foundation of China[51911530154] ; National Natural Science Foundation of China[51671196] ; National Natural Science Foundation of China[91860201] ; National Natural Science Foundation of China[51631008] ; National Science and Technology Major Project[2017-VII-0008-0101]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000497774900006
出版者	SCIENCE PRESS
引用统计	被引频次：7[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/321006/136115
专题	中国科学院金属研究所
通讯作者	Xie Guang
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Xie Guang,Zhang Shaohua,Zheng Wei,et al. Formation and Evolution of Low Angle Grain Boundary in Large-Scale Single Crystal Superalloy Blade[J]. ACTA METALLURGICA SINICA,2019,55(12):1527-1536.
APA	Xie Guang.,Zhang Shaohua.,Zheng Wei.,Zhang Gong.,Shen Jian.,...&Zhang Jian.(2019).Formation and Evolution of Low Angle Grain Boundary in Large-Scale Single Crystal Superalloy Blade.ACTA METALLURGICA SINICA,55(12),1527-1536.
MLA	Xie Guang,et al."Formation and Evolution of Low Angle Grain Boundary in Large-Scale Single Crystal Superalloy Blade".ACTA METALLURGICA SINICA 55.12(2019):1527-1536.