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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
Corresponding AuthorXie Guang(gxie@imr.ac.cn)
2019-12-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume55Issue:12Pages:1527-1536
AbstractNi-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.
Keywordlarge-scale single crystal superalloy blade low angle grain boundary dendrite orientation XCT
Funding OrganizationNational Natural Science Foundation of China ; National Science and Technology Major Project
DOI10.11900/0412.1961.2019.00090
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000497774900006
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136115
Collection中国科学院金属研究所
Corresponding AuthorXie Guang
AffiliationChinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
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.
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