A MOLECULAR DYNAMICS STUDY OF DEFECTS PRODUCED BY DISPLACEMENT CASCADES IN BCC-FE

摘要

The mechanisms of defect production in displacement cascades in irradiated bcc-iron bcc-Fe) have been investigated by molecular dynamics calculations. Simulations were carried out at cascade energies between 1 and 20 keV. Three different defect identification methods with two different reference lattices have been used to analyze the defects produced by displacement cascades. The statistical analysis has been used to examine the influence of cascade energy and radiation temperature on defects and their clusters produced by displacement cascades in bcc-Fe. Defect cluster definition methods were investigated and some results are presented. Wigner-Seitz cell method with perfect lattice as reference lattice was recommended. The results show that the number of defects and clusters increased with cascade energy, but was indistinct with radiation temperature in the energy region of this study.