Study on the homogeneity of tilted dendritic structures in single crystal superalloys

doi:10.1016/j.jmrt.2023.10.019

IMR OpenIR

	Study on the homogeneity of tilted dendritic structures in single crystal superalloys
	Yuan, Xiaotan 1; Zhang, Congjiang 1; Yu, Hongbin 1; Ren, Weili 1; Ding, Biao 1; Lu, Haibiao 1; Zhong, Yunbo 1; Lei, Zuosheng 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)
	2023-11-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	27 页码:1128-1145
摘要	Dendrites play a crucial role in the microstructure of single crystal superalloys, predominantly developing along the [001] orientation. The mechanical performance is greatly influenced by the uniform distribution of dendrites. During the solidification process, we frequently observe instances of dendrites deviating from the [001] orientation, resulting in tilted structures. These deviations give rise to both aligned and misaligned arrays within the transverse section. The study comprehensively examines the homogeneity of tilted dendritic structures. As solidification progresses, new dendrites within the aligned array tend to maintain a hexagonal structure. Simultaneously, the remaining metastable structures gradually transition into hexagonal structures. In contrast, various polygons mutually transform in misaligned array, resulting in a dynamic adjustment of their pro-portions. Consequently, the aligned array exhibits a higher proportion of hexagonal structures and a more uniform dendrite spacing compared to the misaligned array. Within the transitional region, an increase in heptagonal structures leads to heightened non-uniformity in dendrite spacing. The predominance of hexagonal structures can be attributed to their more uniform solute distribution, facilitated by the characteristics of the aligned array, which promote hexagonal structure formation by adjusting the solute field distribution. On the other hand, due to the random positioning of dendrites in the mis-aligned array, various stacking structures coexist in dynamic equilibrium. The research reveals an intrinsic relationship between macroscopic array patterns, stacking structures, dendrite spacing, and microscopic solute distribution. These findings provide a theoretical foundation for the production of high-quality single crystal dendritic structures and offer insights into their influence on material properties.(c) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
关键词	Dendritic array Stacking structure Local primary spacing Phase-field simulation Solute distribution
资助者	National Natural Science Foundation of China ; Independent Research and Development Project of State Key Laboratory of Advanced Special Steel ; Instrumental Analysis and Research Center of Shanghai University ; Shanghai University
DOI	10.1016/j.jmrt.2023.10.019
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 ; Instrumental Analysis and Research Center of Shanghai University ; Shanghai University ; [SKLASS 2022-Z03]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001099963800001
出版者	ELSEVIER
引用统计	被引频次：2[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/321006/177518
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 Ferromet, 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,Yu, Hongbin,et al. Study on the homogeneity of tilted dendritic structures in single crystal superalloys[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2023,27:1128-1145.
APA	Yuan, Xiaotan.,Zhang, Congjiang.,Yu, Hongbin.,Ren, Weili.,Ding, Biao.,...&Zhou, Lanzhang.(2023).Study on the homogeneity of tilted dendritic structures in single crystal superalloys.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,27,1128-1145.
MLA	Yuan, Xiaotan,et al."Study on the homogeneity of tilted dendritic structures in single crystal superalloys".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 27(2023):1128-1145.