Irradiation growth and creep are crucially dependent on the movement of dislocations under irradiation. However, despite being amongst the most commonly existing prior defects in polycrystals, the evolution of pre-existing dislocations and their impact on the formation of dislocation loops during irradiation have been relatively rarely investigated. In this study, the evolution of pre-existing dislocations and their impact on the formation of dislocation loops were investigated in magnesium by electron irradiation at different temperatures. The pre-existing dislocations have a profound influence on the loop size, density and Burgers vector of irradiation loops, and this influence is dependent on both the density of the pre-existing dislocations and irradiation temperature. Dislocation climb and glide were observed, but a significant change in pre-existing dislocation density was not seen.

辐照的生长和蠕变关键取决于辐照下位错的运动。然而，尽管是多晶中最普遍存在的先有缺陷之一，但相对很少研究过辐照过程中先前存在的位错的演变及其对位错环形成的影响。在这项研究中，通过在不同温度下的电子辐照，研究了镁中先前存在的位错的演化及其对位错环形成的影响。预先存在的位错对辐照环的圈尺寸，密度和Burgers向量具有深远的影响，而这种影响取决于既存位错的密度和辐照温度。观察到位错爬升和滑行，