Study on microstructure and mechanical properties of single crystal/powder superalloy pulsed current diffusion bonded joints

To optimize the overall structure design of the aero-engine turbine disks, the study of pulsed current diffusion bonding on the second generation nickel-based single-crystal superalloy DD5 and the third generation powder superalloy FGH98 was performed, and high-quality joints were obtained after post-welding heat treatment(PWHT). The microstructure and element diffusion were analyzed by using SEM and EDS, and the microhardness and room / high...