Influence of Cr/Mo ratio on microstructure and mechanical properties of the Ni-based superalloys fabricated by laser additive manufacturing

Yu, Qun; Wang, Cunshan; Yang, Guang; Ren, Yuhang; Liu, Ningxia; Liang, Yanpeng; Chen, Dong

doi:10.1016/j.jallcom.2021.162484

Cited by 7 publications

(3 citation statements)

References 52 publications

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“…Sargent et al [18] investigated the powder-based DED to find novel alloys by mixing SS316L with Inconel 718. Ferreira et al [19] fabricated In research conducted by Yu et al [8], the effect of the Cr/Mo ratio on the mechanical properties and weldability of four nickel-based superalloys in the additive manufacturing process was investigated. The results showed that by decreasing the Cr/Mo ratio, the inter-dendritic phases evolved from lath and eutectic Laves phases to blocky P phases.…”

Section: Introductionmentioning

confidence: 99%

Functionally Graded Additive Manufacturing of Thin-Walled 316L Stainless Steel-Inconel 625 by Direct Laser Metal Deposition Process: Characterization and Evaluation

Mehrabi

Seyedkashi

Moradi

2023

Metals

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Direct Laser Metal Deposition (DLMD) is a state-of-the-art manufacturing technology used to fabricate 316L stainless steel/Inconel 625 functionally graded material (FGMs) in this research. For the practical application of these materials in the industry, the effects of process parameters on the geometric characteristics and surface roughness require more investigation. This FGM was additively manufactured in five layers by changing the 316L stainless steel/Inconel 625 ratio in each layer. The effects of laser power on geometric characteristics, height stability, and surface roughness were investigated. The microstructural analysis and microhardness profiles were studied. The results show that despite the high solidification rate, the segregation of alloying elements into dendritic areas occurred. It was also found that increasing the laser power will increase the height, width, height stability, and surface roughness of the gradient walls. The maximum width and height of the deposited layers were 1.615 and 6.42 mm, respectively, at the highest laser power (280 W). At the laser power of 220 W, the least surface roughness (Ra = 105 µm) and the best height stability (0.461 mm) will be obtained. The microhardness values will differ in various sections of the gradient walls in a range of 225–277 HV.

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Section: Introductionmentioning

confidence: 99%

Functionally Graded Additive Manufacturing of Thin-Walled 316L Stainless Steel-Inconel 625 by Direct Laser Metal Deposition Process: Characterization and Evaluation

Mehrabi

Seyedkashi

Moradi

2023

Metals

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“…The addition of the Co element of nickel-based superalloys can increase the content of γ phase and reduce the stacking fault energy [8]. The interdendritic phases evolve from lath and eutectic Laves phases to blocky P phases with a decrease in Cr/Mo ratio [9]. Singh et al discovered that substituting V for Mo leads to improved thermodynamic and structural stability of γ' phases [10].…”

Section: Introductionmentioning

confidence: 99%

A novel IN718 superalloy of superior mechanical properties designed by the first principle and D-electron theory

Li,

Chen,

wang

et al. 2023

Preprint

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A novel IN718 superalloy has been designed based on the commercial IN718 alloy to improve its service performance in the aerospace field. Firstly, first principle calculations were performed to determine the total energy, formation enthalpy, and binding energy of the γ-Ni phase, Laves-Fe2Nb phase, and γ-Ni/Fe2Nb interface model doped with Co, Cr, Mo, V, and Zr atoms in IN718 superalloy. The calculation results reveal the influence of various atoms doping on the typical phases of the IN718 superalloy. Secondly, 8488 group’s suitable alloy composition data were selected from 831600 group’s datasets by D-electron theory and Python programs. Subsequently, the optimal alloy components were determined by thermodynamic calculations using the control variable. Finally, molecular dynamics tensile simulations and mechanical properties tests were conducted to validate the mechanical properties of the optimized superalloy. This entire calculation process serves as a reference for designing other alloy compositions.

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“…However, the content of Ni, Co, and other precious metals in the alloys is high, which is not conducive to reducing production costs. [5][6][7][8][9] Therefore, researching and developing new superalloys with simple structures, excellent comprehensive properties, and low costs is of considerable scientific and practical significance.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and atmospheric oxidation behavior of CrCuFeMnNiCo_x high‐entropy alloys fabricated by vacuum hot‐press sintering

Ren

Zhao

Jiang

et al. 2022

Materials & Corrosion

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The CrCuFeMnNiCox high‐entropy alloys (HEAs) were prepared by vacuum hot‐press sintering. The microstructure and atmospheric oxidation behavior at 800°C were studied. The phase structure of the Co0 alloy comprised the Cr‐rich FCC1 major phase, Cu‐rich FCC2 secondary phase, and a small amount of intermetallic compound ρ phase when x = 0. The bulk alloys comprised FCC2 major and FCC1 secondary phases when x ≥ 0.5. The oxidation kinetics curves approximately followed the parabolic law. A high Co content leads to a large oxidation weight gain of the alloys. The oxidation weight gain of the Co0 alloy was the smallest at approximately 4.46 mg cm−2 after atmospheric oxidation for 50 h, while the oxidation weight gain of the Co2.0 alloy was the largest at approximately 5.94 mg cm−2. The Co0 alloys exhibited the best oxidation resistance. Therefore, Co is not beneficial to the improvement of the oxidation properties of the CrCuFeMnNiCox HEAs. The main oxidation products of the HEAs mainly comprised MO, M2O3, M3O4, and (M,Cr)3O4 type metal oxides. The main oxidation mechanism was selective oxidation.

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Influence of Cr/Mo ratio on microstructure and mechanical properties of the Ni-based superalloys fabricated by laser additive manufacturing

Cited by 7 publications

References 52 publications

Functionally Graded Additive Manufacturing of Thin-Walled 316L Stainless Steel-Inconel 625 by Direct Laser Metal Deposition Process: Characterization and Evaluation

Functionally Graded Additive Manufacturing of Thin-Walled 316L Stainless Steel-Inconel 625 by Direct Laser Metal Deposition Process: Characterization and Evaluation

A novel IN718 superalloy of superior mechanical properties designed by the first principle and D-electron theory

Microstructure and atmospheric oxidation behavior of CrCuFeMnNiCo_x high‐entropy alloys fabricated by vacuum hot‐press sintering

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Influence of Cr/Mo ratio on microstructure and mechanical properties of the Ni-based superalloys fabricated by laser additive manufacturing

Cited by 7 publications

References 52 publications

Functionally Graded Additive Manufacturing of Thin-Walled 316L Stainless Steel-Inconel 625 by Direct Laser Metal Deposition Process: Characterization and Evaluation

Functionally Graded Additive Manufacturing of Thin-Walled 316L Stainless Steel-Inconel 625 by Direct Laser Metal Deposition Process: Characterization and Evaluation

A novel IN718 superalloy of superior mechanical properties designed by the first principle and D-electron theory

Microstructure and atmospheric oxidation behavior of CrCuFeMnNiCox high‐entropy alloys fabricated by vacuum hot‐press sintering

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Microstructure and atmospheric oxidation behavior of CrCuFeMnNiCo_x high‐entropy alloys fabricated by vacuum hot‐press sintering