Investigation of the effect of Y۲O۳ nanoparticles additive on the microstructure of Inconel ۷۱۸ laser cladding

This study investigates the impact of Y₂O₃ nanoparticle addition on the microstructure and properties of laser-clad Inconel ۷۱۸ superalloy. The results demonstrate that incorporating Y₂O₃ nanoparticles into Inconel ۷۱۸ and applying laser cladding significantly enhance the microstructure, reducing common defects such as cracks and porosity. The optimal Y₂O₃ content was determined to be ۱ wt%, as this composition resulted in a more uniform microstructure, finer grain refinement, and a defect-free coating. However, exceeding ۱.۵ wt% led to the formation of thermal defects and cracks, underscoring the superalloy’s sensitivity to excessive additive concentrations. Additionally, the homogeneous distribution of Y₂O₃ nanoparticles effectively suppressed grain boundary movement, contributing to enhanced hardness and improved wear resistance. The refined microstructure and reduction in defects also played a crucial role in increasing oxidation resistance at elevated temperatures, making the coated alloy more suitable for extreme operating conditions. Overall, laser cladding with Y₂O₃ nanoparticles presents an innovative approach to improving the mechanical, chemical, and thermal properties of Inconel ۷۱۸. This enhancement expands the potential applications of the alloy in high-performance industries such as aerospace, energy, and oil and gas, where superior material characteristics are essential. Future research should focus on optimizing process parameters and investigating the long-term performance of Y₂O₃-reinforced coatings in aggressive service environments.

کلیدواژه ها:

Laser Cladding ، Inconel ۷۱۸ ، Y₂O₃ Nanoparticles ، Microstructure