Primary-dendrite-pattern regulation by secondary branch during the directional solidification of the single crystal superalloy

doi:10.1016/j.matchar.2023.113208

IMR OpenIR

	Primary-dendrite-pattern regulation by secondary branch during the directional solidification of the single crystal superalloy
	Yuan, Xiaotan 1; Hu, Xingjin 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)
	2023-10-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	204 页码:16
摘要	The dendrite array by directional solidification determines the mechanical properties of the single crystal su-peralloy. Achieving precise and effective control over the directional dendrite array has been challenging due to a lack of understanding the underlying mechanism. The study found that secondary branches with specific orientations play a significant role in determining the arrangement pattern of primary dendrites on the transverse section. These secondary branches induce either a unidirectional or bidirectional aligned pattern in the primary dendrite array. The proportion of aligned dendrites increases with the solidification distance, but decreases with the withdrawal velocity. The competitive growth coefficient of secondary branch was proposed based on the effectiveness components of thermal gradient. This coefficient is determined by the convexity of the liquid-solid interface, the angle between the primary arm and the vertical direction, and the orientations angle of secondary branch. The presence of a large competitive coefficient at the liquid-solid interface edge near the crucible gives secondary branches an advantage in growth. This leads to the development of tertiary arms which further grow into the main trunks, aligning parallel to the primary dendrites and forming the aligned pattern. Additionally, based on the competitive coefficient, the formation criterion and distribution law of dendritic pattern transitions were summarized. This provides effective guidance not only for controlling dendrite arrangement but also for estimating the single crystal orientation through visual inspection by back-calculating the formation criterion.
关键词	Dendritic pattern Secondary branch Tertiary arm Liquid-solid interface Thermal gradient
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 Ferrometallurgy, Shanghai University
DOI	10.1016/j.matchar.2023.113208
收录类别	SCI
语种	英语
资助项目	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 Ferrometallurgy, Shanghai University[SKLASS 2022-Z03]
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:001049652700001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：3[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/321006/178946
专题	中国科学院金属研究所
通讯作者	Ren, Weili; Lu, Haibiao
作者单位	1.Shanghai Univ, State Key Lab Adv Special Steel, Shanghai Key Lab Adv Ferrometallurgy, Shanghai 200444, Peoples R China 2.Inst Elect Engn Chinese Acad Sci, 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,Hu, Xingjin,Zhang, Congjiang,et al. Primary-dendrite-pattern regulation by secondary branch during the directional solidification of the single crystal superalloy[J]. MATERIALS CHARACTERIZATION,2023,204:16.
APA	Yuan, Xiaotan.,Hu, Xingjin.,Zhang, Congjiang.,Yu, Hongbin.,Ren, Weili.,...&Zhou, Lanzhang.(2023).Primary-dendrite-pattern regulation by secondary branch during the directional solidification of the single crystal superalloy.MATERIALS CHARACTERIZATION,204,16.
MLA	Yuan, Xiaotan,et al."Primary-dendrite-pattern regulation by secondary branch during the directional solidification of the single crystal superalloy".MATERIALS CHARACTERIZATION 204(2023):16.