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

X. B. Hu; N. C. Sheng; Y. M. Zhu; J. F. Nie; J. D. Liu; X. F. Sun; X. L. Ma

doi:10.1007/s11661-020-05646-y

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

X. B. Hu^*, N. C. Sheng, Y. M. Zhu, J. F. Nie, J. D. Liu, X. F. Sun, X. L. Ma

^*Corresponding author for this work

NUANCE - Atomic and Nanoscale Characterization Experimental Center

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	1689-1698
Number of pages	10
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	51
Issue number	4
DOIs	https://doi.org/10.1007/s11661-020-05646-y
State	Published - Apr 1 2020

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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@article{badea61dea9047478e188e0a137338ab,

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

abstract = "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.",

author = "Hu, {X. B.} and Sheng, {N. C.} and Zhu, {Y. M.} and Nie, {J. F.} and Liu, {J. D.} and Sun, {X. F.} and Ma, {X. L.}",

note = "Funding Information: This work was financially supported by the National Natural Science Foundation of China under Grant Number 11327901. Dr. J. D. Liu would like to acknowledge the National Natural Science Foundation of China (NSFC) under Grant No. 51871221. Dr. N.C. Sheng would like to acknowledge the funding by the “Hundred Talents Program (Chinese Academy of Sciences).” Publisher Copyright: {\textcopyright} 2020, The Minerals, Metals & Materials Society and ASM International.",

year = "2020",

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doi = "10.1007/s11661-020-05646-y",

language = "English (US)",

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journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",

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T1 - Atomic-Scale Investigation of the Borides Precipitated in a Transient Liquid Phase-Bonded Ni-Based Superalloy

AU - Hu, X. B.

AU - Sheng, N. C.

AU - Zhu, Y. M.

AU - Nie, J. F.

AU - Liu, J. D.

AU - Sun, X. F.

AU - Ma, X. L.

N1 - Funding Information: This work was financially supported by the National Natural Science Foundation of China under Grant Number 11327901. Dr. J. D. Liu would like to acknowledge the National Natural Science Foundation of China (NSFC) under Grant No. 51871221. Dr. N.C. Sheng would like to acknowledge the funding by the “Hundred Talents Program (Chinese Academy of Sciences).” Publisher Copyright: © 2020, The Minerals, Metals & Materials Society and ASM International.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - 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.

AB - 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.

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JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

IS - 4

ER -

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

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