| 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 Author | Xie Guang(gxie@imr.ac.cn) |
| 2019-12-11 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 55Issue:12Pages:1527-1536 |
| Abstract | 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. |
| Keyword | large-scale single crystal superalloy blade low angle grain boundary dendrite orientation XCT |
| Funding Organization | National Natural Science Foundation of China ; National Science and Technology Major Project |
| DOI | 10.11900/0412.1961.2019.00090 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000497774900006 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/136115 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xie Guang |
| Affiliation | Chinese 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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