Nimonic 75 and Inconel 600 alloys are the Nickel-based superalloys which used in manufacturing gas turbine components. In current research, a superalloy Ni-based sheet were used, joint by resistant spot welded (RSW) machine at currents of 2, 4, 6 kA, pressure 5 7 bar, times 0.6, 0.9 1.2. Non- destructive inception methods light scanning electron method (SEM) optic microscope (LOM) to evaluate j...