The effect of bonding time on the microstructure and mechanical properties of transient liquid phase bonding between SAF 2507 and AISI 304

Abdolvand, R.; Atapour, Masoud; Shamanian, M.; Allafchian, Alireza

doi:10.1016/j.jmapro.2016.11.013

Cited by 36 publications

(9 citation statements)

References 33 publications

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“…It can be inferred that these fine particles were Ni 3 Si precipitates from the γ-Ni solid solution according to the Ni-Si phase diagram. These results were in agreement with previous work on the TLP bonding of duplex stainless steels [15,16]. It can be concluded that athermal solidification occurred during the cooling process.…”

Section: Microstructural Characterization Of the Bonded Samplessupporting

confidence: 92%

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Effect of Bonding Temperature on Microstructure and Mechanical Properties during TLP Bonding of GH4169 Superalloy

Zhu

Dong

et al. 2019

Applied Sciences

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The effect of bonding temperature on the microstructure and mechanical properties of transient liquid phase (TLP) joints of GH4169 superalloy was investigated. Joining processes were carried out at 1040–1100 °C for 30 min using BNi-2 solder paste. The results showed that three distinct microstructural zones were formed in the joint region: an athermal solidification zone (ASZ), consisting of eutectic compounds; an isothermal solidification zone (ISZ), consisting of γ solid solution; and a diffusion affected zone (DAZ), consisting of Ni-Cr rich boride and Cr-Nb-Mo-rich boride compounds. With increasing bonding temperature, the amounts of eutectic compounds in ASZ first decreased and then increased. A eutectic-free joint centerline was obtained at 1080 °C. The maximum bonding shear strength reached 728.03 MPa due to the completion of isothermal solidification. Fractographic studies revealed that the boride compounds in ASZ and the intermetallic compounds in DAZ were the main causes for the failure of joints. The fracture mode of the sample bonded at 1040 °C was brittle, and the fracture path was along the ASZ. However, the fracture mode of the sample bonded at 1080 °C was ductile, and the fracture occurred along the DAZ.

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Section: Microstructural Characterization Of the Bonded Samplessupporting

confidence: 92%

“…The results showed that the mechanical properties of the joint mainly depend on the precipitation of the eutectic phase during solidification. Abdolvand et al [16] studied TLP bonding of SAF2507 and AISI304 stainless steel using…”

Section: Introductionmentioning

confidence: 99%

Effect of Bonding Temperature on Microstructure and Mechanical Properties during TLP Bonding of GH4169 Superalloy

Zhu

Dong

et al. 2019

Applied Sciences

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“…4a), Ni-rich silicide and Cr-rich boride phases were formed, respectively. Formation of Cr-rich borides in the ASZ is reported in other studies [23][24][25]. Nickel-rich silicides intermetallic such as Ni 3 Si were generated by gradually enrichment of silicon in Ni based filler.…”

Section: Joint Microstructuresupporting

confidence: 58%

“…7, it can be concluded that a linear correlation between second root of TLP time and the width of the ASZ is present. Jafari et al [25] and Abdolvand et al [24] reported same findings in the dissimilar TLP joining of stainless steels.…”

Section: Effect Of Bonding Time On Joint Microstructurementioning

confidence: 52%

Transient Liquid Phase Bonding of 17-4-PH Stainless Steel Using Conventional and Two-Step Heating Process

2020

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Conventional and two-step heating transient liquid phase bonding (TLP) experiments of martensitic precipitation hardening stainless steel 17-4-PH were studied employing AMS 4777 braze filler at temperature of 1050 °C for different times (15 to 90 min) to accomplish the ideal brazing condition. The effect of TLP methods and bonding conditions on the microstructure and shear bond strength was investigated. The critical bonding time for isothermal solidification in conventional and two-step heating TLP was 60 min and 45 min, respectively. The microstructure of isothermal solidification zone consisted of Ni-rich solid solution phase. Eutectic constituents Cr-rich boride and Ni 3 Si were formed in the joint centerline in the athermally solidified zone. In the conventional method planar interface was formed, however in TLP bonding under temperature gradient non-planar interface was formed, high angel grain boundaries merged at the end of isothermal solidification and homogenous bond was produced. Due to the decrease of athermally solidified zone the shear strength increased by increasing the holding time and when using the two-step heating process because of better metal to metal contact, the shear strength was higher. The optimum condition was a temperature gradient TLP in 60 min bonding time, which led to shear strength of 435 MPa.

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“…In order to obtain a high-quality brazed joint, the choice of filler metals is very important. BNi-2, containing (2.75–3.5 mass%) B element, has been commonly used in brazing of stainless steel; however, when brazing thin-walled components, B tends to diffuse to the base material and form brittle Cr-B IMCs, causing grain boundary penetration embrittlement, and dissolution corrosion, thus reducing the reliability of brazed joints [ 8 , 9 , 10 , 11 , 12 ]. Compared with B, it is difficult for P to diffuse into the base material and generate IMCs in the bonding-affected zone due to its large atom radius and low diffusion rate [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of SUS304 Stainless Steel Joints Brazed with Electrodeposited Ni-Cr-P Alloy Coatings

et al. 2021

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In this study, an amorphous Ni-13.4Cr-11.6P (mass%) alloy coating with a thickness of 30 μm was deposited on the surface of SUS304 stainless steel as a brazing filler metal to conduct brazing. The differential thermal analysis measurements indicate that the electrodeposited Ni-13.4Cr-11.6P alloy has a melting point of approximately 892 °C, which is almost consistent with that of the commercial BNi-7 filler metal. The microstructure, shear strength, and fracture mode of the brazed joint were investigated using an electron probe X-ray microanalyzer, a scanning electron microscope, an optical microscope, and a universal testing machine. The results showed that the brazed filler metal is filled between the SUS304 stainless steel plates without any flaws in the brazed seam. The P-containing phases, i.e., the Cr-P rich phase and the (Ni,Fe)3P phase, were formed in the brazed seam. The shear strength of the brazed joint obtained in this study is 59.0 MPa. The fracture occurs in the brazed filler zone, where the brittle P-containing phases are present. Galvanic current measurement results showed that the brazed Ni-13.4Cr-11.6P alloy coating has a better corrosion resistance than that of the brazed Ni-11P alloy coating, which can be attributed to the formation of a large amount of Ni-Fe solid solution and Cr-P rich phase in the top layer of the brazed Ni-13.4Cr-11.6P alloy coating.

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The effect of bonding time on the microstructure and mechanical properties of transient liquid phase bonding between SAF 2507 and AISI 304

Cited by 36 publications

References 33 publications

Effect of Bonding Temperature on Microstructure and Mechanical Properties during TLP Bonding of GH4169 Superalloy

Effect of Bonding Temperature on Microstructure and Mechanical Properties during TLP Bonding of GH4169 Superalloy

Transient Liquid Phase Bonding of 17-4-PH Stainless Steel Using Conventional and Two-Step Heating Process

Microstructure and Properties of SUS304 Stainless Steel Joints Brazed with Electrodeposited Ni-Cr-P Alloy Coatings

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