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<p>Nickel-based superalloys such as Inconel 718 are essential in aerospace due to their strength, high-temperature performance, and resistance to corrosion, and fatigue. With the shift to hydrogen as a sustainable aviation fuel, understanding their tribological behavior in hydrogen exposure is essential. This study examined hydrogen-exposed Inconel 718 under ambient conditions against an Inconel 718 using a ball-on-flat tribometer. <i>Ex-situ</i> analyses (confocal microscopy, SEM, micro-Raman spectroscopy) showed no significant changes in friction or wear compared to non-exposed samples. This is attributed to the removal of a hydrogen-modified surface layer during initial sliding, accompanied by localized plastic deformation, including slip and twinning.</p> Graphical abstract <p></p>

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Hydrogen-induced tribological behavior of Ni-based superalloy for gas turbine engines

  • 期刊论文

  • 发表日期：

    2025年9月10日

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  • Amit Roy,
  • Istiak Mahmud Saikat,
  • Andre Renan Mayer,
  • Evelin Barbosa de Mélo,
  • Manoj Arthanari,
  • Christian Moreau,
  • Stephen Yue,
  • Melanie J. Hazlett,
  • Pantcho Stoyanov

摘要

Nickel-based superalloys such as Inconel 718 are essential in aerospace due to their strength, high-temperature performance, and resistance to corrosion, and fatigue. With the shift to hydrogen as a sustainable aviation fuel, understanding their tribological behavior in hydrogen exposure is essential. This study examined hydrogen-exposed Inconel 718 under ambient conditions against an Inconel 718 using a ball-on-flat tribometer. Ex-situ analyses (confocal microscopy, SEM, micro-Raman spectroscopy) showed no significant changes in friction or wear compared to non-exposed samples. This is attributed to the removal of a hydrogen-modified surface layer during initial sliding, accompanied by localized plastic deformation, including slip and twinning.

Graphical abstract