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Effects of heat treatment on surface integrity and wear performance of Inconel 718 alloy fabricated by laser powder bed fusion process additive manufacturing under different laser power and scanning speed parameters

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Abstract

As with all additive manufacturing processes, selecting appropriate process parameters in the laser powder bed fusion (LPBF) process plays an important role in the surface integrity and mechanical behavior of Inconel 718 components. Hatch distance, laser power, laser scanning speed and layer thickness are the main parameters that can be altered in the LPBF process. This study focuses on the role of laser power and scanning speed when hatch distance is larger than laser spot size on product properties. This work reveals that LPBF process parameters significantly impact the fabricated Inconel 718 material properties. However, although the material properties are enhanced by selecting appropriate process parameters, the components need post-processing methods to have the desired properties. Heat treatment was applied as a post-process to obtain parts with the desired material properties. The effect of heat treatment applied to the parts fabricated at various laser power and laser scanning speeds on the parts’ surface integrity, and mechanical performance is comprehensively presented. Determining the details of the interactions of different production parameters with heat treatment is one of the motivations of this study. The presented results establish that heat treatment can change specimens’ microstructural aspects. The results also show a 10% increase in microhardness and a 14% increase in wear performance of specimens, due to the final state of the microstructure after heat treatment.

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Authors and Affiliations

  1. Department of Airframe and Powerplant Maintenance, Eskisehir Technical University, Eskisehir, Turkey

    Nedim Sunay

  2. Department of Mechanical Engineering, Piri Reis University, Istanbul, Turkey

    Mert Kaya

  3. Department of Mechanical Engineering, Engineering Faculty, Bursa Uludag University, Bursa, Turkey

    Mustafa Safa Yılmaz

  4. Department of Mechanical Engineering, Technology Faculty, Marmara University, Istanbul, Turkey

    Yusuf Kaynak

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  1. Nedim Sunay
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  2. Mert Kaya
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  3. Mustafa Safa Yılmaz
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  4. Yusuf Kaynak
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Correspondence to Nedim Sunay.

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Sunay, N., Kaya, M., Yılmaz, M.S. et al. Effects of heat treatment on surface integrity and wear performance of Inconel 718 alloy fabricated by laser powder bed fusion process additive manufacturing under different laser power and scanning speed parameters. J Braz. Soc. Mech. Sci. Eng. 45, 430 (2023). https://doi.org/10.1007/s40430-023-04298-4

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