Influence de l'ecrouissage sur la formation des cavites d'irradiation dans l'aluminium

Performance of Aluminum in Research Reactors

“…For annealed materials irradiated at temperatures above 150 C, certainly above 200 C, no dislocation-type radiation damage microstructure or voids are produced; coarse Si particles are seen. In cold rolled pure Al, some large cavities remained 58 after irradiation at 220 C. During postirradiation annealing 59 removal of damage microstructure was slowed by impurity content and by higher doses. For 1 h anneals of 1100Al, void swelling began recovery at 200 C and was almost complete at 300 C where gas bubble swelling intervened.…”

“…It comes from the 59 Ni isotope, which is not found in natural Ni. The 59 Ni must first be created from 58 Ni that comprises 68.1% of natural Ni. The two-step process 66 to yield the He is 58 Ni þ n th !…”

“…The effects of prior cold work on swelling in Al agree in general that the presence of cold work dislocation structure decreases the overall void swelling but the reduction is not massive; concurrence of dislocation recovery confuses the details. [80][81][82][83] …”