Effects of orientation on fatigue crack propagation of Ni3Al under super-gravity by molecular dynamics simulation

The effects of orientation on fatigue crack propagation Ni3Al alloys under the super-gravity condition were studied by using molecular dynamics method. research found that initiation and mechanisms different for models: [001](010) germinated in form blunting damage voids [1̄10](110) began as slip bands. For [112̄](111) crack, same crack. In stage, main deformation all models bands, but directions different: presented ductile cracking brittleness fracture. Then, growth rate stress intensity factor also analyzed condition. results showed had slowest compared to other two cracks condition, maximum variable at initiation, variation tendency factors was