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Influence of Geometric Structure and Feeding Behavior of Casting on Freckle Formation during Directional Solidification of a Ni-Based Single-Crystal Superalloy
Han, Dongyu1,2; Jiang, Weiguo1,3; Xiao, Jiuhan1,2; Li, Kaiwen1; Lu, Yuzhang1; Lou, Langhong1
Corresponding AuthorJiang, Weiguo(jwg@wfust.edu.cn)
2021-03-22
Source PublicationCRYSTAL RESEARCH AND TECHNOLOGY
ISSN0232-1300
Pages11
AbstractDetermining 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.
Keywordcasting structures feeding behaviors freckles Ni‐ based superalloys single crystal
Funding OrganizationNational Natural Science Foundation of China ; National Science and Technology Major Project of China ; National Key Research and Development Program of China
DOI10.1002/crat.202000197
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaCrystallography
WOS SubjectCrystallography
WOS IDWOS:000631019300001
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161356
Collection中国科学院金属研究所
Corresponding AuthorJiang, Weiguo
Affiliation1.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
Recommended Citation
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.
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