Understanding the formation and evolution of low-angle grain boundaries in Nickel-Based single crystal superalloys

doi:10.1016/j.matchar.2024.113733

IMR OpenIR

	Understanding the formation and evolution of low-angle grain boundaries in Nickel-Based single crystal superalloys
	Yuan, Xiaotan 1; Zhang, Congjiang 1; Ren, Weili 1; Ding, Biao 1; Lu, Haibiao 1; Zhong, Yunbo 1; Lei, Zuosheng 1; Zheng, Tianxiang 1; Li, Qiang 1; Wang, Hui 2; Wang, Qiuliang 2; Liaw, Peter K.3; Qin, Xuezhi 4; Zhou, Lanzhang 4
通讯作者	Ren, Weili(wlren@staff.shu.edu.cn) ; Lu, Haibiao(luhaibiao@shu.edu.cn) ; Zhong, Yunbo(yunboz@staff.shu.edu.cn)
	2024-03-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	209 页码:13
摘要	Grain boundaries have long been of utmost importance in the research and application of single-crystal superalloys. However, there are still many unsolved mysteries regarding the understanding of grain boundaries throughout the solidification process. The work focuses on investigating the formation, the evolution, and the disappearance of low-angle grain boundaries, including subgrain boundaries. The findings show that the lowangle grain boundaries and subgrain boundaries in various dendritic arrays exhibit morphological variances and different development processes. The subgrain boundaries in the aligned array appear to be straight, where irregularly fine-grained gamma' precipitates have formed. In contrast, low-angle grain boundaries show a curved and sawtooth-like structure in misaligned arrays. The gamma' precipitates locating in the region are regularly long strips. The generation of grain boundaries is a result of the adjustment in dendritic spacing, where the influence of solute leads to dendrite deflection. The misorientation of grain boundary is constantly changing in response to dynamic changes in dendrite spacing. The low-angle grain boundaries eventually dissolve as the dendritic array evolves. This study enriches understanding of the interplay between dendrite arrays and grain boundaries, offering theoretical insights into the evolutionary patterns of grain boundaries within single-crystal superalloys.
关键词	Low-angle grain boundaries Subgrain boundaries Deflection Dendritic array Dendrite spacing
资助者	National Natural Science Foundation of China ; Independent Research and Development Project of State Key Laboratory of Advanced Special Steel ; Shanghai Key Laboratory of Advanced Fer-rometallurgy, Shanghai University ; Instrumental Analysis and Research Center of Shanghai University
DOI	10.1016/j.matchar.2024.113733
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52373319] ; National Natural Science Foundation of China[51871142] ; Independent Research and Development Project of State Key Laboratory of Advanced Special Steel ; Shanghai Key Laboratory of Advanced Fer-rometallurgy, Shanghai University[SKLASS 2022-Z03] ; Instrumental Analysis and Research Center of Shanghai University
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001181490700001
出版者	ELSEVIER SCIENCE INC
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/184931
专题	中国科学院金属研究所
通讯作者	Ren, Weili; Lu, Haibiao; Zhong, Yunbo
作者单位	1.Shanghai Univ, State Key Lab Adv Special Steel, Shanghai Key Lab Adv Ferrometallurgy, Shanghai 200444, Peoples R China 2.Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China 3.Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Xiaotan,Zhang, Congjiang,Ren, Weili,et al. Understanding the formation and evolution of low-angle grain boundaries in Nickel-Based single crystal superalloys[J]. MATERIALS CHARACTERIZATION,2024,209:13.
APA	Yuan, Xiaotan.,Zhang, Congjiang.,Ren, Weili.,Ding, Biao.,Lu, Haibiao.,...&Zhou, Lanzhang.(2024).Understanding the formation and evolution of low-angle grain boundaries in Nickel-Based single crystal superalloys.MATERIALS CHARACTERIZATION,209,13.
MLA	Yuan, Xiaotan,et al."Understanding the formation and evolution of low-angle grain boundaries in Nickel-Based single crystal superalloys".MATERIALS CHARACTERIZATION 209(2024):13.