[PO-B2] Poster Session 2

[P2-16] Microstructure evolution of cascade annealing in irradiated pure α-Zr from molecular dynamics simulations

^○Bang Wen¹, Rongjian Pan¹, Wei Zhang¹, Lu Wu¹, Xiaoyong Wu¹, Aitao Tang², Wen He¹, Y.R. Ovcharenko³, D.O. Kharchenko³ (1.The First Sub-Institute, Nuclear Power Institute of China, China, 2.College of Materials Science and Engineering, Chongqing University, China, 3.Institute of Applied Physics, National Academy of Science of Ukraine, Ukraine)

The microstructure evolution of cascade annealing in α-Zr crystals at T=300K, 400K, and 500 K for energy of 2, 6 and 10 keV with initially driving directions <0001> and <01-10> of primary knocked atoms (PKA) are investigated by using molecular dynamics simulations. The results show that the relaxation time (τ_r) of cascades can play a role of an effective parameter for describing radiation damages during molecular dynamics simulations. of cascade with the larger surface area but with the same volume is much smaller, which promotes faster recombination of defects during cascade annealing. Energy is a crucial factor in the formation of cascade displacements of atoms and appearing of defects compared with temperature and direction of movement for initially knocking atoms.