Abstract : To understand the role of different metallurgical parameters on the void formation mechanisms, various austenitic stainless steels were elaborated and irradiated with heavy ions. Two alloys, in several metallurgical conditions (15Cr/15Ni–Ti and 15Cr/25Ni–Ti), were irradiated in the JANNUS-Saclay facility at 600 °C with 2 MeV Fe$^{2+}$ ions up to 150 dpa. Resulting microstructures were observed by Transmission Electron Microscopy (TEM). Different effects on void swelling are highlighted. Only the pre-aged samples, which were consequently solute and especially titanium depleted, show cavities. The nickel-enriched matrix shows more voids with a smaller size. Finally, the presence of nano-precipitates combined with a dense dislocation network decreases strongly the number of cavities.
https://hal-cea.archives-ouvertes.fr/cea-01350710 Contributor : Marianne LericheConnect in order to contact the contributor Submitted on : Wednesday, October 2, 2019 - 2:15:38 PM Last modification on : Wednesday, March 23, 2022 - 3:51:07 PM
Baptiste Rouxel, Caroline Bisor, Yann de Carlan, Arnaud Courcelle, Alexandre Legris. Influence of the austenitic stainless steel microstructure on the void swelling under ion irradiation. EPJ N - Nuclear Sciences & Technologies, EDP Sciences, 2016, 2, pp.30. ⟨10.1051/epjn/2016023⟩. ⟨cea-01350710⟩