Atomic-Scale Investigation of the Borides Precipitated in a Transient Liquid Phase-Bonded Ni-Based Superalloy

doi:10.1007/s11661-020-05646-y

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	Atomic-Scale Investigation of the Borides Precipitated in a Transient Liquid Phase-Bonded Ni-Based Superalloy
	Hu, X.B.2,3; Sheng, N.C.1; Zhu, Y.M.5; Nie, J.F.5; Liu, J.D.1; Sun, X.F.1; Ma, X.L.3,4
	2020-04-01
关键词	Atoms Borides High resolution transmission electron microscopy Linear transformations Nickel alloys Nickel metallography Scanning electron microscopy SuperalloysCrystallographic orientation relationships Diffusion-affected zone High-angle annular dark fields Interfacial features Melting point depressant Morphological features Transient liquid phase Transient liquid phase bonding
卷号	51
期号	4
DOI	10.1007/s11661-020-05646-y
页码	1689-1698
英文摘要	Boron is widely used as a melting point depressant (MPD) element in filler materials for utilization in transient liquid phase (TLP) bonding. Various kinds of borides will precipitate in the diffusion-affected zone (DAZ) and influence the integral mechanical properties of bonded materials. In this study, we systematically investigate the boride precipitates formed in DAZ in a TLP-bonded Ni-based superalloy using electron diffraction and atomic-scale high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). The M3B2- and M5B3-type precipitates are observed, both of which obey definitive crystallographic orientation relationships (ORs) with the matrix. The atomic structures of some interfaces associated with these borides are defined. The dendrite morphological feature comprising M3B2 and M5B3 is examined in detail. The dendrite trunks are always composed of two phases including M3B2 and M5B3 borides. The core of the trunk is always M3B2 phase enclosed by M5B3 boride. The dendrite branches consist of M5B3 phase. The M3B2 in the dendrite trunk keeps a definitive OR with the neighboring M5B3. The interfacial features among M3B2, M5B3, and matrix, and the unique intergrowth of M3B2 and M5B3 are further rationalized by phase transformation crystallography. © 2020, The Minerals, Metals & Materials Society and ASM International.
会议录	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
会议录出版者	Springer
语种	英语
ISSN号	10735623
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000515709200002
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132641]
专题	材料科学与工程学院_特聘教授组
作者单位	1.Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang; 110016, China; 2.Department of Materials Science and Engineering, Northwestern University, Evanston; IL; 60208, United States; 3.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang; 110016, China; 4.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China 5.Department of Materials Science and Engineering, Monash University, Clayton; VIC; 3800, Australia;
推荐引用方式 GB/T 7714	Hu, X.B.,Sheng, N.C.,Zhu, Y.M.,et al. Atomic-Scale Investigation of the Borides Precipitated in a Transient Liquid Phase-Bonded Ni-Based Superalloy[C]. 见:.