Transient liquid phase bonding of IC10 single crystal with GH3039 superalloy using BNi2 interlayer: Microstructure and mechanical properties

Zhang, L.X.; Sun, Zhichao; Xue, Qingguo; Lei, Min; Tian, Xianbin

doi:10.1016/j.matdes.2015.11.041

Cited by 72 publications

(9 citation statements)

References 26 publications

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“…This is because Cr is a strong boride former [21], and the local depletio is the result of formation of various Cr borides in the DAZ adjacent to DAZ/ISZ interfac The concentration of Cr in this region is 2.4%, which is higher than 0.8% in the paren copper alloy. The microstructure of the TLP bonded Ni-based superalloy is well studie [7,12,18,21,23], and most of the reported features, such as needle-like borides precipitate were also found at the ISZ/DAZ interface and DAZ of the sample examined in this wor (points 5 and 6 in Figure 4b).…”

Section: Microstructural Examinationssupporting

confidence: 59%

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Fail-Safe Joints between Copper Alloy (C18150) and Nickel-Based Superalloy (GH4169) Made by Transient Liquid Phase (TLP) Bonding and Using Boron-Nickel (BNi-2) Interlayer

Zhang

Shirzadi

2021

Metals

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Joining heat conducting alloys, such as copper and its alloys, to heat resistant nickel-based superalloys has vast applications in nuclear power plants (including future fusion reactors) and liquid propellant launch vehicles. On the other hand, fusion welding of most dissimilar alloys tends to be unsuccessful due to incompatibilities in their physical properties and melting points. Therefore, solid-state processes, such as diffusion bonding, explosive welding, and friction welding, are considered and commercially used to join various families of dissimilar materials. However, the solid-state diffusion bonding of copper alloys normally results in a substantial deformation of the alloy under the applied bonding load. Therefore, transient liquid phase (TLP) bonding, which requires minimal bonding pressure, was considered to join copper alloy (C18150) to a nickel-based superalloy (GH4169) in this work. BNi-2 foil was used as an interlayer, and the optimum bonding time (keeping the bonding temperature constant as 1030 °C) was determined based on microstructural examinations by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), tensile testing, and nano-hardness measurements. TLP bonding at 1030 °C for 90 min resulted in isothermal solidification, hence obtained joints free from eutectic phases. All of the tensile-tested samples failed within the copper alloy and away from their joints. The hardness distribution across the bond zone was also studied.

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Section: Microstructural Examinationssupporting

confidence: 59%

“…The microstructure of the TLP bonded Ni-based superalloy is well studied [7,12,18,21,23], and most of the reported features, such as needle-like borides precipitates, were also found at the ISZ/DAZ interface and DAZ of the sample examined in this work (points 5 and 6 in Figure 4b).…”

Section: Microstructural Examinationsmentioning

confidence: 59%

Fail-Safe Joints between Copper Alloy (C18150) and Nickel-Based Superalloy (GH4169) Made by Transient Liquid Phase (TLP) Bonding and Using Boron-Nickel (BNi-2) Interlayer

Zhang

Shirzadi

2021

Metals

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Section: L→l + Ni(ss)→l + Ni(ss) + Ni Borides→ni(ss) + Ni Borides + Cr Boridesmentioning

confidence: 99%

“…However, when the holding time was 120 min, the tensile strength of the joint decreased slightly to 434 MPa. This can be due to grain coarsening when the holding duration extended to 120 min, which normally weakens the joint strength [20]. Figure 9 shows the fracture morphologies of TLP-bonded joints of DZ40M brazed with different holding duration at 1160 °C.…”

Section: L→l + Ni(ss)→l + Ni(ss) + Ni Borides→ni(ss) + Ni Borides + Cr Boridesmentioning

confidence: 99%

Experimental and Numerical Study of Transient Liquid Phase Diffusion Bonded DZ40M Superalloys

et al. 2021

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Transient liquid phase (TLP) diffusion bonding of DZ40M cobalt-based superalloy was carried out using a self-made NiCrCoWB intermediate layer. The typical microstructure of the joint was investigated. The effect of holding time on the microstructural evolution and the tensile strength of the brazed joints was studied. The tensile strength of the joints TLP bonded at 1160 °C for 60 min reached the maximum value of 487 MPa, which was 88.6% of the base metal strength. The diffusion of boron and the evolution of the eutectic zone were numerically studied. The time needed for isothermal solidification completion was calculated and predicted, which was well in accordance with the experimental results.

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“…As a solid solution strengthened austenitic alloy, the nickel-based superalloy GH3039 has been widely used for critical parts of aeroengines due to its excellent mechanical properties, good anti-oxidation, and high corrosion resistance [ 1 , 2 , 3 ]. With the increase of aero-engine thrust, GH3039 superalloy is required to withstand higher stresses and operating temperatures.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Fatigue Life of GH3039 Superalloy by Laser Shock Peening

Tang

Zhang

et al. 2020

Materials

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In order to improve fatigue life of GH3039 superalloy, GH3039 superalloy sheets were treated by laser shock peening (LSP). The microstructure of GH3039 superalloy before and after LSP was characterized using an optical microscope, transmission electron microscope (TEM), and X-ray diffractometer. The fatigue life of the samples with and without LSP was investigated by fatigue experiments. Moreover, surface profile and residual stress were also examined. Experimental results indicated that the grains in the surface layer of the LSP sample were remarkably refined and reached the nanometer scale. The average surface roughness increased from 0.024 μm to 0.19 μm after LSP. The average fatigue life of the laser treated samples was 2.01 times larger than that of the untreated specimens. Additionally, mathematical statistical analysis confirms that LSP has a significant influence on the fatigue life of GH3039 superalloy. The improvement of fatigue life for the laser processed GH3039 superalloy was mainly attributed to compressive residual stress and grain refinement generated by LSP.

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Transient liquid phase bonding of IC10 single crystal with GH3039 superalloy using BNi2 interlayer: Microstructure and mechanical properties

Cited by 72 publications

References 26 publications

Fail-Safe Joints between Copper Alloy (C18150) and Nickel-Based Superalloy (GH4169) Made by Transient Liquid Phase (TLP) Bonding and Using Boron-Nickel (BNi-2) Interlayer

Fail-Safe Joints between Copper Alloy (C18150) and Nickel-Based Superalloy (GH4169) Made by Transient Liquid Phase (TLP) Bonding and Using Boron-Nickel (BNi-2) Interlayer

Experimental and Numerical Study of Transient Liquid Phase Diffusion Bonded DZ40M Superalloys

Improvement of Fatigue Life of GH3039 Superalloy by Laser Shock Peening

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