Molecular dynamics study of displacement cascades in Ni3Al I. General features and defect production efficiency

摘要: Abstract The damage produced by displacement cascades in the L12 alloy Ni3Al at 100 K has been investigated molecular dynamics using many-body interatomic potentials. 76 ranging energy from 0.15 to 5 keV have simulated order study effects of and species primary recoil atom. Computer-generated colour plots used visualize nature arrangement point defects cascade events. There is a change morphology end collisional phase for energies range 1–2 keV, separate subcascade regions can be seen some keV. Individual replacement sequences do not make significant contribution final state. efficiency production Frenkel pairs declines with increasing similar fashion that found recently pure metals. Approximately 90% interstitials created are Ni-Ni dumbbell atoms, tendency to...