On the multi-scale mechanical and tribological behavior of directed energy deposited inconel-718

Key Points

• This research aims to explore the effects of thermal treatments on the mechanical and wear properties of Inconel-718 produced through additive manufacturing.
• Additive manufacturing using laser direct energy deposition for Inconel-718
• Post-processing through different thermal treatments, including double aging
• Nanoindentation mapping to assess hardness and elastic modulus
• Tensile strength testing to measure mechanical performance
• Wear tests to evaluate tribological behavior
• Double aging resulted in the highest average hardness and elastic modulus due to γ′ and γ″ precipitates.
• Tensile strength exceeded 1350 MPa in optimized samples.
• Lower elongation was observed in samples due to brittle phase formation.
• Thermal processing significantly enhanced mechanical and tribological performance compared to as-built conditions.

Abstract