Radiation Damage Simulation Using Molecular Dynamics in Ni-Based Alloy

Abstract In the present study, we investigated the irradiation-induced induction in Ni 80 Cr 20 , Ni 80 Fe 20 , Ni 50 Fe 50 , Ni 40 Fe 40 Cr 20 by molecular dynamics (MD) simulation. A previously published modified potential is used to provide a detailed account of the process involved in the production and evolution of defects. Ni 50 Fe 50 and Ni 40 Fe 40 Cr 20 alloys exhibit comparable damage level and better radiation response compared to Ni 80 Cr 20 and Ni 80 Fe 20 . The inhibition effect of interstitial clusters increases with the complexity of alloying elements. The alloying of Cr has resulted in Ni 80 Fe 20 and Ni 50 Fe 50 tend to form 1/3<111> dislocation loops while at the same time making Ni 40 Fe 40 Cr 20 and Ni 80 Cr 20 more susceptible to stacking fault tetrahedra formation than the remaining two alloys.