Microstructure evolution of Inconel 625 with 0.4 wt% boron modification during gas tungsten arc deposition

Tian, Yuan; Ouyang, Bin; Gontcharov, Alexandre; Gauvin, Raynald; Lowden, P.; Brochu, Mathieu

doi:10.1016/j.jallcom.2016.10.019

Cited by 39 publications

(10 citation statements)

References 31 publications

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“…3b shows non-continuous eutectics in the inter-dendritic regions and fine isolated borides mainly in the dendritic cores in the lower section. This microstructure variation is attributed to re-melting of the eutectics during the subsequent deposition passes [18]. The hardness of the upper deposit is higher from the existence of the continuous eutectic morphology, the modified non-continuous eutectics are associated with the hardness loss in the lower deposits.…”

Section: Microstructure Of As-deposited Conditionmentioning

confidence: 98%

“…EDS maps of the main alloying elements (Ni, Mo, Nb, Cr and B) were acquired to observe the elemental concentration of the different phases in the lower section (see [18,29]. The chemical comparison between the inter-dendritic Laves phase and dendritic cores was also proved by EPMA analysis and the results are presented in Table 2.…”

Section: Microstructure Of As-deposited Conditionmentioning

confidence: 99%

“…Based on this concept, Liburdi Turbine Services utilized B based eutectics formed during welding solidification of B modified weld metal for crack healing during repairing of high γc Ni-based superalloys [14][15][16][17]. In the previous research [18], the authors have studied the microstructure evolution during the gas tungsten arc deposition using Inconel 625 with 0.4 wt% B modification.…”

Section: Introductionmentioning

confidence: 99%

“…The layerby-layer process during deposition results in the local re-melting of substrate or previously deposited layers [18], this repeated building process also induces multiple thermal cycles that could lead to graded microstructure and mechanical properties along the deposition [19]. Therefore, the heat treatments are usually utilized to homogenize the microstructure after deposition.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Self Cite

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Section: Microstructure Of As-deposited Conditionmentioning

confidence: 98%

Section: Microstructure Of As-deposited Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Self Cite

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“…Intermetallic phases like Ni 2 (Cr,Mo) with a Pt 2 Mo structure, γ" (Ni 3 Nb) with a DO 22 structure and δ (Ni 3 Nb) with a D0 a structure, as well as secondary carbides like M 23 C 6 and M 6 C, precipitate at different temperatures [6][7][8][9][10][11]. Primary MC carbides, M(C,N) carbo nitrides, TiN nitrides and the Laves phase form during casting [12,13]. The heterogeneous precipitation of γ" occurs during aging in the temperature range between 700 and 750 • C [1,10].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Segregation Bands and Hot Rolling on the Precipitation of Secondary Phases during Aging at 750 °C for Nickel Alloy 625

Malej

Medved²,

Batič

et al. 2019

Metals

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For Inconel 625, where the γ” and δ phases precipitate, the influence of prior hot rolling on the process is not well covered. The influence of segregation bands and prior hot rolling on the precipitation of secondary phases during aging at 750 °C for different times was investigated. Prior hot-rolling was conducted on a hot rolling mill at 1050 °C and 1150 °C with three different deformation levels. The hot rolled samples were aged at 750 °C for 1, 5, 25 and 125 h. The γ″ precipitated in both the deformed and recrystallized grains in the segregation bands containing a high concentration of niobium and molybdenum and a lower concentration of nickel, chromium and iron. The opposite was observed between the segregation bands where no γ″ precipitate was found. There was a smooth transition in the density and the size of the γ″ particles in the deformed grains at the border of the segregation bands, while a more complex transition occurred in the recrystallized grains. This occurred in the area where the average niobium concentration decreased from 4.5 to 2.7 wt. %, which influenced the mechanical properties.

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In situ synthesis and characterization of ceramic reinforced Inconel 718 coatings using B4C-Inconel 718 powders by laser-directed energy deposition

Zhang

Zhao

et al. 2022

Int J Adv Manuf Technol

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Inconel 718 has been widely used in aerospace, nuclear and marine industries due to excellent hightemperature mechanical properties and corrosion resistance. In recent years, laser directed energy deposition (DED) become a competitive method in the fabrication of Inconel 718 coatings. Compared with other surface coating processes, laser DED has the advantage of extremely ne-grained structures, strong metallurgical bonding, and high density. However, the hardness and wear resistance of Inconel 718 coatings still need to be improved. To further improve these properties, ceramic reinforced Inconel 718 coatings have been investigated. Compared with ex-situ ceramic reinforcements, the in-situ synthesized reinforcements have the advantage of re ned ceramic particle size, uniform distribution, and low thermal stress. B 4 C was a preferable additive material to fabricate in-situ synthesized multi-component ceramic reinforced Inconel 718 coatings. The addition of B 4 C could form a large number of borides and carbides as ceramic reinforcements. In addition, the in-situ reactions between Inconel 718 and B 4 C could release heat during the fabrication, thereby promoting the melting of material powders. However, there are currently no investigations on the in-situ synthesis mechanisms, microstructure, and mechanical properties of laser DED fabricated B 4 C-Inconel 718 coatings. In this study, the effects of B 4 C on the properties of Inconel 718 coatings were investigated. Results show that Ni 3 B, NbB, and Cr 3 C 2 phases were formed. With the addition of B 4 C, the size of Laves phase was re ned and the porosity was decreased. The hardness and wear resistance of B 4 C reinforced coatings were improved by about 34% and 28%, respectively.

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Microstructure evolution of Inconel 625 with 0.4 wt% boron modification during gas tungsten arc deposition

Cited by 39 publications

References 31 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

The Influence of Segregation Bands and Hot Rolling on the Precipitation of Secondary Phases during Aging at 750 °C for Nickel Alloy 625

In situ synthesis and characterization of ceramic reinforced Inconel 718 coatings using B4C-Inconel 718 powders by laser-directed energy deposition

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