Microstructure and mechanical performance of ODS superalloys manufactured by selective laser melting

•Y2O3 diffusion-reinforced IN718 superalloy was fabricated by selective laser melting (SLM).•Superalloy obtained high densities and uniform distribution of Y2O3 in the matrix with proper powder mixing and laser processing techniques.•The hardness and strength of the SLM-processed oxide dispersion reinforced superalloy were improved compared to the IN718 alloy under other processes.•The mechanisms of the laser processing process and oxide particles on the evolution of microstructure and strengthening effect are elucidated.