Synergistic enhancement of strength and wear resistance in nickel-based superalloy fabricated by oscillating laser directed energy deposition via laser shock peening

Inconel 718 nickel-based superalloy is widely used in aerospace and energy sectors, but traditional manufacturing methods struggle to achieve optimal synergistic performance in strength, toughness, and wear resistance. Oscillating laser directed energy deposition (OL-DED) technology significantly improves the microstructure by promoting equiaxed grain formation, yet as-deposited components still exhibit deficiencies in strength and wear resistance. This study introduces Laser Shock Peening (LSP) as a post-processing technique to further enhance mechanical properties by inducing residual compressive stresses and increasing dislocation density. This study systematically investigates the synergistic effects of…

• NN
  National Natural Science Foundation of China

  Award: 52205334
• NS
  Natural Science Foundation of Hunan Province

  Award: 2025JJ40039
• SK
  State Key Laboratory of Tribology

  Award: SKLTKF24B18