Chemical and mechanical post-processing of Alloy 718 built via electron beam-powder bed fusion: Surface texture and corrosion behavior

Sadeghi, M.; Díaz, Agustín; McFadden, Patrick; Sadeghimeresht, Esmaeil

doi:10.1016/j.matdes.2022.110405

Cited by 18 publications

(2 citation statements)

References 54 publications

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“…This technique involves the creation of microstructures on metal surfaces through surface treatment technology (Wang et al , 2023; Ammosova et al , 2020). This technology can improve the friction and lubrication performance of metal surfaces (Zhang et al , 2022; Zhang et al , 2023; Annadi and Syed, 2023; Liu et al , 2022), reduce material wear and noise generation (Mo et al , 2013; Wang et al , 2013; Xue et al , 2020) and improve the corrosion resistance (Sadeghi et al , 2022) and fatigue life (Chen et al , 2021) of parts. In recent years, surface treatment technologies at the micrometer and nanometer scale, especially the fabrication of microstructures, have become a research focus.…”

Section: Introductionmentioning

confidence: 99%

Optimization design of irregular grooved texture on the surface of sliding pair based on adaptive genetic algorithm

Shen,

Li,

et al. 2023

ILT

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Purpose This study aims to investigate the effects of irregular groove textures on the friction and wear performance of sliding contact surfaces. These textures possess multiple depths and asymmetrical features. To optimize the irregular groove texture structure of the sliding contact surface, an adaptive genetic algorithm was used for research and optimization purposes. Design/methodology/approach Using adaptive genetic algorithm as an optimization tool, numerical simulations were conducted on surface textures by establishing a dimensionless form of the Reynolds equation and setting appropriate boundary conditions. An adaptive genetic algorithm program in MATLAB was established. Genetic iterative methods were used to calculate the optimal texture structure. Genetic individuals were selected through fitness comparison. The depth of the groove texture is gradually adjusted through genetic crossover, mutation, and mutation operations. The optimal groove structure was ultimately obtained by comparing the bearing capacity and pressure of different generations of micro-convex bodies. Findings After about 100 generations of iteration, the distribution of grooved textures became relatively stable, and after about 320 generations, the depth and distribution of groove textures reached their optimal structure. At this stage, irregular texture structures can support more loads by forming oil films. Compared with regular textures, the friction coefficient of irregular textures decreased by nearly 47.01%, while the carrying capacity of lubricating oil films increased by 54.57%. The research results show that irregular texture structures have better lubrication characteristics and can effectively improve the friction performance of component surfaces. Originality/value Surface textures can enhance the friction and lubrication performance of metal surfaces, improving the mechanical performance and lifespan of components. However, surface texture processing is challenging, as it often requires multiple experimental comparisons to determine the optimal texture structure, resulting in high trial-and-error costs. By using an adaptive genetic algorithm as an optimization tool, the optimal surface groove structure can be obtained through simulation and modeling, effectively saving costs in the process.

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Section: Introductionmentioning

confidence: 99%

Optimization design of irregular grooved texture on the surface of sliding pair based on adaptive genetic algorithm

Shen,

Li,

et al. 2023

ILT

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“…The Inconel 718 (IN718) superalloys, consisting of more than 8 different components and characterized by a precipitation-strengthened structure predominantly composed of γ and γ' phases, demonstrate significant potential due to their exceptional tensile strength, high yield strength, and excellent resistance to corrosion at elevated temperatures [1][2][3]. The IN718 superalloys have been extensively utilized in the aerospace sector, particularly in aero engines [4,5]. However, with the continuous improvement of aircraft engine performance, the performance of IN718 high-temperature alloy is facing challenges, thus necessitating urgent enhancements for its overall capabilities.…”

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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Microstructural and corrosion effects of HIP and chemically accelerated surface finishing on laser powder bed fusion Alloy 625

Prochaska

Hildreth

2022

Int J Adv Manuf Technol

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Chemical and mechanical post-processing of Alloy 718 built via electron beam-powder bed fusion: Surface texture and corrosion behavior

Cited by 18 publications

References 54 publications

Optimization design of irregular grooved texture on the surface of sliding pair based on adaptive genetic algorithm

Optimization design of irregular grooved texture on the surface of sliding pair based on adaptive genetic algorithm

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

Microstructural and corrosion effects of HIP and chemically accelerated surface finishing on laser powder bed fusion Alloy 625

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