Effect of foil orientation on damage accumulation during irradiation in magnesium and annealing response of dislocation loops

摘要: Abstract The effect of foil orientation on damage accumulation behavior in commercial purity magnesium is investigated by situ electron and ion irradiation. Transmission microscope has been used to study the dislocation loops formed agglomeration point defects during It observed that ratio prism plane basal increases as changed from foil. vacancy interstitial also foils compared foils. This defect reversed when irradiated with 1 MeV Kr2+ ions formation were only did not take place Analysis showed all have Burgers vector type 1 6 〈 2 0 ¯ 3 〉 are nature whereas mixed interstitial/vacancy character. In annealing experiments at different temperatures performed suggest those become thermodynamically unstable anneal out a matter few seconds other stable continue shrink absorbing surrounding clusters. activation energy for shrinkage derived results show takes mechanism assisted self diffusion.