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<p>Inconel 718 is a crucial nickel-based superalloy utilized in high-temperature applications, such as gas turbines and components for power generation. High-temperature erosive wear tests were conducted on an Inconel 718 alloy produced through casting and laser powder bed fusion (L-PBF) at temperatures of 25&#xa0;°C, 200&#xa0;°C, 400&#xa0;°C, and 600&#xa0;°C to investigate the wear mechanisms. Residual stress and surface topography were analyzed for eroded surfaces. No significant defects or undesirable phases are present in the L-PBF Inconel 718 alloy. The hardness of the L-PBF Inconel 718 alloy is 8% higher than that of cast Inconel 718, with a variation of ± 3 HRC in both transverse and longitudinal directions. The erosion rate exhibits an increase with rising temperatures. At a temperature of 600&#xa0;°C, the erosion rate for the L-PBF Inconel 718 alloy (0.002085&#xa0;mg/g) is observed to be 10% lower compared to that of the cast Inconel 718 alloy (0.002301&#xa0;mg/g). The eroded surface was analyzed with SEM for erosive wear mechanism at high temperatures, and the results confirm that wear damage was due to micro-plowing and plastic deformation. Compressive residual stress is observed in both L-PBF and cast Inconel 718 alloy after conducting high-temperature erosive wear at 600&#xa0;°C.</p>

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Comparative Analysis of High-Temperature Erosive Wear Behavior of Inconel 718 Superalloys Manufactured by Additive Manufacturing and Casting

  • 期刊论文

  • 发表日期：

    2025年10月6日

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  • R. Harichandran,
  • D. Vijaya Lakshmi,
  • K. Murugan,
  • G. Siva Kumar

摘要

Inconel 718 is a crucial nickel-based superalloy utilized in high-temperature applications, such as gas turbines and components for power generation. High-temperature erosive wear tests were conducted on an Inconel 718 alloy produced through casting and laser powder bed fusion (L-PBF) at temperatures of 25 °C, 200 °C, 400 °C, and 600 °C to investigate the wear mechanisms. Residual stress and surface topography were analyzed for eroded surfaces. No significant defects or undesirable phases are present in the L-PBF Inconel 718 alloy. The hardness of the L-PBF Inconel 718 alloy is 8% higher than that of cast Inconel 718, with a variation of ± 3 HRC in both transverse and longitudinal directions. The erosion rate exhibits an increase with rising temperatures. At a temperature of 600 °C, the erosion rate for the L-PBF Inconel 718 alloy (0.002085 mg/g) is observed to be 10% lower compared to that of the cast Inconel 718 alloy (0.002301 mg/g). The eroded surface was analyzed with SEM for erosive wear mechanism at high temperatures, and the results confirm that wear damage was due to micro-plowing and plastic deformation. Compressive residual stress is observed in both L-PBF and cast Inconel 718 alloy after conducting high-temperature erosive wear at 600 °C.