Cyclic response and dislocation evolution of a nickel-based superalloy under low cycle fatigue deformation

The low cycle fatigue behavior of Inconel 750H superalloy, a newly designed Nickel-based superalloy, was studied in this work. The superalloy exhibited an initial cyclic hardening and a following continuous cyclic softening behavior at the strain amplitudes from 0.35% to 0.6%, while a stress saturation at the strain amplitude of 0.3%. Cyclic response considering cyclic stress, plastic strain, and hysteresis loop area was studied. Four...