Microstructure and tensile properties of nickel-based superalloy K417G bonded using transient liquid-phase infiltration

Yang, Yongxing; Xie, Yanhui; Wang, M.S.; Ye, W.

doi:10.1016/j.matdes.2013.04.024

Cited by 34 publications

(6 citation statements)

References 14 publications

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“…Thus, the coarsened borides are believed to cause initial fracture and have low resistance to the advancing fracture during deformation [36]. So even though with existence of zigzag grain boundaries, the formation of coarsened borides results in the decreasing elongation.…”

Section: Tensile Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Effect of heat treatment on microstructure evolution and mechanical properties of Inconel 625 with 0.4 wt% boron modification fabricated by gas tungsten arc deposition

Tian

Gontcharov²,

Gauvin

et al. 2017

Materials Science and Engineering: A

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Section: Tensile Propertiesmentioning

confidence: 99%

“…6, and also provides the evidence that the fracture initiated from the coarsened borides. [36]. The fractography of annealed and aged IN625B material at 982°C is presented in Fig.…”

Section: Tensile Propertiesmentioning

confidence: 99%

Effect of heat treatment on microstructure evolution and mechanical properties of Inconel 625 with 0.4 wt% boron modification fabricated by gas tungsten arc deposition

Tian

Gontcharov²,

Gauvin

et al. 2017

Materials Science and Engineering: A

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“…Brazing [4][5][6][7][8][9][10] and transient liquid phase bonding [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] are attractive for joining Ni-based superalloys. For example, Luo et al used a BNi-2 filler metal to join Hastelloy C-276 (UNS N10276) [7].…”

Section: Introductionmentioning

confidence: 99%

Creep Behavior of Diffusion-Welded Alloy 617

Sah

Hwang

Kim

2021

Metals

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Plate-type heat exchangers are anticipated to be used in the next-generation nuclear industry, and solid-state diffusion welding is a critical technology for building plate-type heat exchangers with high integrity. In this study, we manufactured a diffusion weldment and evaluated its creep behavior. Microscopic analysis revealed that Al-rich oxides were developed along the interface, significantly impeding grain-boundary movement across the interface. Oxide-containing planar grain boundaries resulted in premature brittle fracture at the interface with less than 9% creep strain under all test conditions. The time to rupture and time to 1% creep strain of the diffusion weldment were less than those of the as-received alloy, while the slopes in double-logarithmic plots were almost identical for both alloys. In a Larson–Miller parameter study, the stress to rupture of the diffusion weldment reached 95.59% of that of the as-received alloy, whereas the stress to 1% creep strain steeply decreased in the low-stress range.

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“…Because of the objective reality of enhancing aeroengine performance, blades must work in an environment of high temperature, overloading, and high frequency vibration [1]. The Ni-based superalloy K417G containing a high content of Al + Ti (>7.0 wt.%) is widely used in aeroengine turbine blades for its excellent high-temperature properties and relatively low fabricating cost [2][3][4][5]. However, the turbine blade root with fir tree geometry experiences early failure frequently, because of the wear problems occurring in the working process [1].…”

Section: Introductionmentioning

confidence: 99%

Cracking, Microstructure and Tribological Properties of Laser Formed and Remelted K417G Ni-Based Superalloy

Liu

Wang

et al. 2019

Coatings

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The K417G Ni-based superalloy is widely used in aeroengine turbine blades for its excellent properties. However, the turbine blade root with fir tree geometry experiences early failure frequently, because of the wear problems occurring in the working process. Laser forming repairing (LFR) is a promising technique to repair these damaged blades. Unfortunately, the laser formed Ni-based superalloys with high content of (Al + Ti) have a high cracking sensitivity. In this paper, the crack characterization of the laser forming repaired (LFRed) K417G—the microstructure, microhardness, and tribological properties of the coating before and after laser remelting—is presented. The results show that the microstructure of as-deposited K417G consists of γ phase, γ′ precipitated phase, γ + γ′ eutectic, and carbide. Cracking mechanisms including solidification cracking, liquation cracking, and ductility dip cracking are proposed based on the composition of K417G and processing characteristics to explain the cracking behavior of the K417G superalloy during LFR. After laser remelting, the microstructure of the coating was refined, and the microhardness and tribological properties was improved. Laser remelting can decrease the size of the cracks in the LFRed K417G, but not the number of cracks. Therefore, laser remelting can be applied as an effective method for strengthening coatings and as an auxiliary method for controlling cracking.

show abstract

Microstructure and tensile properties of nickel-based superalloy K417G bonded using transient liquid-phase infiltration

Cited by 34 publications

References 14 publications

Effect of heat treatment on microstructure evolution and mechanical properties of Inconel 625 with 0.4 wt% boron modification fabricated by gas tungsten arc deposition

Effect of heat treatment on microstructure evolution and mechanical properties of Inconel 625 with 0.4 wt% boron modification fabricated by gas tungsten arc deposition

Creep Behavior of Diffusion-Welded Alloy 617

Cracking, Microstructure and Tribological Properties of Laser Formed and Remelted K417G Ni-Based Superalloy

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