Study of ODS formation by ion-beam implantation of Al+ and O+ on the AISI 316L steel and this influence in the He bubble grown
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2022
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24.
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A class of materials namely oxide dispersion strengthened (ODS) steels has been studied as
structural materials for IV generation fission reactors and fusion reactors. The ODS shown to be
effective in changing mechanical, thermal properties and resistance to swelling at high
temperatures due to the greater thermal stability of the oxides combined with the insertion of new
interfaces that serve as a vacancy trap and displacement fixation points. In this work the ion-beam
implantation of Al+ and O+ was applied by the ion-beam synthesis to synthesize ODS in AISI316L
austenite steel that is an important structural material for the fusion and fission reactors
considering the corrosion resistance at high temperatures. Also is present a preliminary study of
nucleation and growth of He bubbles in the way to simulate the swelling process and this behavior
under the presence of the oxide dispersions. The samples were characterized by TEM, SAED and
STEM-EDX techniques. SAED and EDX measurements show that the precipitates formed in samples
implanted only with O and in samples implanted with Al and O are chromium oxide. Furthermore,
STEM-EDX analyses show that no Al signal was observed neither in the precipitates nor in the
matrix. The oxide precipitates are formed during the implantation procedure, with no need to
undergo thermal activation processes. The Al implantation participates in second phase
precipitation, acting in the production of vacancies during implantation and consequently
enhancing the nucleation rate of the ODS. Temperature effects were also assessed in this study. At
550 ºC the influence of temperature in the thermodynamics of the system is few prominent, with
precipitates and He bubbles’ sizes remaining quite stable. In other way, at 700 ºC is observed a
drastic change in the geometry of the precipitates that become faceted in coherent interfaces whit
the austenitic matrix. Regarding the He bubble system, it was observed lower tendency of growth
in the samples containing the ODS. So, the oxide particles produced by ion-beam synthesis are an
efficient way to hinder the growth of the inert gas bubbles, indicating a possible way for the study
of the swelling process in the AISI316L.
Como referenciar
FABRIM, Z.E.; SANTOS, G.T.; TIMM, M.d.; ROSSI, J.L.; FICHTNER, P.F. Study of ODS formation by ion-beam implantation of Al+ and O+ on the AISI 316L steel and this influence in the He bubble grown. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24., 6-10 de novembro, 2022, Águas de Lindóia, SP. Resumo... Disponível em: http://repositorio.ipen.br/handle/123456789/33789. Acesso em: 30 Dec 2025.
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