Bonding temperature effects on the wide gap transient liquid phase bonding of Inconel 718 using BNi-2 paste filler metal

Yan, Guangxu; Bhowmik, Ayan; Castagne, Sylvie; Song, Xu; Tan, Sung Chyn; Tan, Ming Jen

doi:10.1016/j.apsusc.2019.04.070

Cited by 20 publications

(2 citation statements)

References 21 publications

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“…With the rapid development of current technology, the maintenance of turbine blades is becoming more and more rigorous [ 12 ]. As a result, relatively large cracks or worn areas (>1.5 mm) are discovered in aerospace components, where the narrow gap TLP bonding technique would be inadequate [ 13 ]. For wide-gap brazing, the selection and design of the filler metal composition is the key factor to improve the brazing performance [ 14 , 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Wide-Gap Brazing of K417G Alloy Assisted by In Situ Precipitation of M3B2 Boride Particles

Zhang

et al. 2020

Materials

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In this study, K417G Ni-based superalloy with a 20-mm gap was successfully bonded at 1200 °C using powder metallurgy with a powder mixture. The results indicated that the microstructure and mechanical properties of the as-bonded alloy were highly dependent on the brazing time (15–45 min), mainly due to the precipitation and distribution characteristics of M3B2 boride particles. Specifically, alloy brazed for 30 min exhibited desirable mechanical properties, such as a high tensile ultimate strength of 971 MPa and an elongation at fracture of 6.5% at room temperature, exceeding the balance value (935 MPa) of the base metal. The excellent strength and plasticity were mainly due to coherent strengthening and dispersion strengthening of the in situ spherical and equiaxed M3B2 boride particles in the γ + γ′ matrix. In addition, the disappearance of dendrites and the homogenization of the microstructure are other factors that cannot be excluded. This powder metallurgy technique, which can avoid the eutectic transformation of traditional brazing, provides a new effective method for wide-gap repair of alloy materials.

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Section: Introductionmentioning

confidence: 99%

Wide-Gap Brazing of K417G Alloy Assisted by In Situ Precipitation of M3B2 Boride Particles

Zhang

et al. 2020

Materials

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“…However, the inclusion of melting point depressants (MPDs), such as boron, silicon, and phosphorus, in the nickelbased filler alloy can lead to the formation of eutectic phases like borides, silicides, and phosphides during the cooling stage, adversely affecting the mechanical properties of brazed joints. [9][10][11][12][13] To address this issue, transient liquid phase (TLP) bonding, also known as diffusion brazing, emerges as an effective method. TLP bonding involves three distinct stages: base metal dissolution, isothermal solidification, and solid-state homogenization.…”

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confidence: 99%

Effect of Bonding Time, Composition of Interlayer, and Postbond Heat Treatment on Transient Liquid Phase Joints of Inconel 718 Superalloy

Chen,

Liu,

et al. 2024

Adv Eng Mater

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The investigation aimed to explore the relationship between the microstructure and mechanical properties of transient liquid phase‐bonded joints of Inconel 718 (IN718) nickel‐based superalloy, utilizing BNi‐1 and BNi‐2 interlayers with a thickness of 50 µm, produced at 1150 °C for varying durations. Microstructural analysis, facilitated by SEM, and phase analysis, utilizing EDS, revealed a diverse range of microstructures, including continuous eutectic intermetallic phases and eutectic‐free configurations under different bonding conditions. Additionally, the interfacial diffusion of IN718/BNi‐2 was simulated by molecular dynamics. Notably, higher mass fractions of Cr in the interlayer were found to prolong the time of isothermal solidification. The use of BNi‐2 interlayers, 50 µm in thickness, resulted in joints achieving isothermal solidification within a remarkably brief 10 mins, a significantly shorter duration compared to previous studies. Mechanical tests, encompassing microhardness and uniaxial tensile experiments, were carried out on all samples. The microhardness of the Isothermally Solidified Zone (ISZ) decreased with increasing bonding time. The tensile strength of bonded joints increased with extended bonding time before isothermal solidification completion, followed by a subsequent decline. The highest tensile strength (893.3 MPa) was observed in joints using BNi‐2 interlayer after applying post bond heat treatment (PBHT), representing approximately 88.5% of the base metal tensile strength.This article is protected by copyright. All rights reserved.

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Effect of Temperature on Metallurgical Reactions and Microstructure Evolution of 316L/BNi-2 Brazed Joints

Duan

Liao

et al. 2021

J. of Materi Eng and Perform

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Bonding temperature effects on the wide gap transient liquid phase bonding of Inconel 718 using BNi-2 paste filler metal

Cited by 20 publications

References 21 publications

Wide-Gap Brazing of K417G Alloy Assisted by In Situ Precipitation of M3B2 Boride Particles

Wide-Gap Brazing of K417G Alloy Assisted by In Situ Precipitation of M3B2 Boride Particles

Effect of Bonding Time, Composition of Interlayer, and Postbond Heat Treatment on Transient Liquid Phase Joints of Inconel 718 Superalloy

Effect of Temperature on Metallurgical Reactions and Microstructure Evolution of 316L/BNi-2 Brazed Joints

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