Reveal the stacking fault shearing mechanism by its annihilation process in Ni-based single crystal superalloys

Effect of Loading Method, Temperature, and Twin Defects on the Mechanical Behavior of Nanocrystalline Ni with Gradient Spacing Twin Structure

“…However, the microscopic changes such as stacking fault nucleation and dislocation movement during the deformation process of single-crystal nickel-based alloys are difficult to observe intuitively. − Therefore, we established a single-crystal nickel nanopillar model and simulated the tensile deformation process of the nanopillar through molecular dynamics. We investigated the influence of loading methods on the dislocation motion, established the deformation mechanism at different temperatures, and analyzed the influence mechanism of hole defects in twin boundaries with different spacing on the dislocation nucleation process.…”

High-resolution STEM investigation of the role of dislocations during decomposition of Ti1-xAlxNy

“…Stacking faults are known to form during film growth and plastic deformation, and they are typically not considered to be a factor during spinodal decomposition due to the high temperatures involved. In fact, high temperature annealing (T ≥ 0.68 T melt ) has been used as means to annihilate SFs in certain materials [25,26]. Also, transition metal nitrides are known to have high stacking fault energies (SFE) [27][28][29], which should suppress their formation.…”