Influence of Geometric Structure and Feeding Behavior of Casting on Freckle Formation during Directional Solidification of a Ni-Based Single-Crystal Superalloy

doi:10.1002/crat.202000197

IMR OpenIR

	Influence of Geometric Structure and Feeding Behavior of Casting on Freckle Formation during Directional Solidification of a Ni-Based Single-Crystal Superalloy
	Han, Dongyu 1,2; Jiang, Weiguo 1,3; Xiao, Jiuhan 1,2; Li, Kaiwen 1; Lu, Yuzhang 1; Lou, Langhong 1
通讯作者	Jiang, Weiguo(jwg@wfust.edu.cn)
	2021-03-22
发表期刊	CRYSTAL RESEARCH AND TECHNOLOGY
ISSN	0232-1300
页码	11
摘要	Determining the effect of casting geometric structure on freckle formation is important in designing the directional solidification parameter of single-crystal superalloy castings. In this research, single-crystal castings of a third-generation nickel (Ni)-based superalloy with different thicknesses and structures are prepared by conventional Bridgman high-rate-solidification technique at withdrawal rates of 1, 3, and 6 mm min(-1). The experimental results show that the freckles in castings with expansion structures are severer than those with contraction structures at a withdrawal rate of 1 mm min(-1), and vice versa at withdrawal rates of 3 and 6 mm min(-1). It is found that the larger casting thickness tends to promote the freckle formation at the same withdrawal rate. Furthermore, a lower tendency is displayed at the withdrawal rate of 3 mm min(-1) in freckle formation, whereas an increased tendency is displayed at the withdrawal rate of 6 mm min(-1). The different withdrawal rates, thicknesses, and structures of casting cause differences in cooling rate, shrinkage flow, and mushy zone morphology, which are believed to be responsible for the tendency of freckle formation.
关键词	casting structures feeding behaviors freckles Ni‐ based superalloys single crystal
资助者	National Natural Science Foundation of China ; National Science and Technology Major Project of China ; National Key Research and Development Program of China
DOI	10.1002/crat.202000197
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51674235] ; National Science and Technology Major Project of China[2017VI-0001-0070] ; National Key Research and Development Program of China[2017YFB0702904]
WOS研究方向	Crystallography
WOS类目	Crystallography
WOS记录号	WOS:000631019300001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：9[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/321006/161352
专题	中国科学院金属研究所
通讯作者	Jiang, Weiguo
作者单位	1.Chinese Acad Sci, Inst Met Res, Shichangxu Innovat Ctr Adv Mat, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Univ Sci & Technol, Shouguang 262700, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Han, Dongyu,Jiang, Weiguo,Xiao, Jiuhan,et al. Influence of Geometric Structure and Feeding Behavior of Casting on Freckle Formation during Directional Solidification of a Ni-Based Single-Crystal Superalloy[J]. CRYSTAL RESEARCH AND TECHNOLOGY,2021:11.
APA	Han, Dongyu,Jiang, Weiguo,Xiao, Jiuhan,Li, Kaiwen,Lu, Yuzhang,&Lou, Langhong.(2021).Influence of Geometric Structure and Feeding Behavior of Casting on Freckle Formation during Directional Solidification of a Ni-Based Single-Crystal Superalloy.CRYSTAL RESEARCH AND TECHNOLOGY,11.
MLA	Han, Dongyu,et al."Influence of Geometric Structure and Feeding Behavior of Casting on Freckle Formation during Directional Solidification of a Ni-Based Single-Crystal Superalloy".CRYSTAL RESEARCH AND TECHNOLOGY (2021):11.