Effects of different scanning speeds on microstructure evolution and tribological properties of Inconel 718 alloy vacuum electron beam surface modification

Zhao, Guanghui; Zhang, Peng; Li, Juan; Zhang, Zhe; Li, Huaying; Ma, Lifeng

doi:10.1016/j.mtsust.2023.100613

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…The rate of diffusion of active carbon atoms along the crystal defects was substantially higher than that in the body. Therefore, the crystal defects formed by the plastic deformation layer of the surface are conducive to the rapid diffusion of active carbon atoms adsorbed on the surface into the substrate [39,40]. In the process of gas carburization, the formation of the carburized layer mainly depended on the surface adsorption and inward diffusion of activated carbon atoms, so that the surface layer had high carburization and carbon concentration.…”

Section: Enhanced Carburization and Strengthening Mechanism Analysismentioning

confidence: 99%

Effect of Scanning Electron Beam Pretreatment on Gas Carburization of 22CrMoH Gear Steel

Jiang,

Qu,

Liu

et al. 2024

Coatings

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22CrMoH was selected for the gear steel material in this work, and the temperature field change in the scanning electron beam was analyzed to determine the optimal scanning parameters and explored the effect of scanning electron beam pretreatment (Abbreviated as: SEBP) on gas-carburizing (GC) efficiency and organizational properties of gear steel. The results showed that the scanning electron beam caused the material to form a thermally deformed layer 110 μm thick, and it promoted the adsorption of carbon atoms on the surface and their inward diffusion. Under the same gas-carburizing conditions, the carburizing efficiency was improved, and the thickness of the carburized layer increased from 0.78 to 1.09 mm. Furthermore, the hardness of the GC specimens with the SEBP increased from 615 to 638 HV0.05 at 0.1 mm of the sample surface, whereas the hardness of the cross-sectional region decreased gradually, indicating that the scanning electron beam enhanced the adhesion between the carburized layer and matrix zone. A comparative analysis of the microstructures of the GC specimens with and without the SEBP showed that the carbide particles in the surface layer of the samples become smaller and that of volume fraction of residual austenite reduced in size. In terms of the mechanical properties, the surface friction coefficient decreased from 0.87 to 0.46 μ and the GC specimen with the SEBP had a higher cross-sectional hardness gradient. Its friction coefficient was reduced from approximately 0.8 to almost 0.45 μ, and the wear amount of the specimens with SEBP was 47.7% of that of the matrix specimens.

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Section: Enhanced Carburization and Strengthening Mechanism Analysismentioning

confidence: 99%

Effect of Scanning Electron Beam Pretreatment on Gas Carburization of 22CrMoH Gear Steel

Jiang,

Qu,

Liu

et al. 2024

Coatings

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Tribological Investigations on Additively Manufactured Inconel 718 Features with Silicon Carbide Ball: Role of the Tribo-Oxide Layer

Basha,

Sankar,

Murthy

et al. 2024

Tribol Lett

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Effects of different scanning speeds on microstructure evolution and tribological properties of Inconel 718 alloy vacuum electron beam surface modification

Cited by 2 publications

References 21 publications

Effect of Scanning Electron Beam Pretreatment on Gas Carburization of 22CrMoH Gear Steel

Effect of Scanning Electron Beam Pretreatment on Gas Carburization of 22CrMoH Gear Steel

Tribological Investigations on Additively Manufactured Inconel 718 Features with Silicon Carbide Ball: Role of the Tribo-Oxide Layer

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