1. Evolution of defects in Ti6-4 under Ti2+ ion irradiation: Focus on radiation-induced precipitates
- Author
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Thierry Millot, Dominique Mangelinck, Moukrane Dehmas, Marion Descoins, S. Doriot, Emilie Jouanny, J. Malaplate, Lucien Allais, Aix-Marseille Université - AMU (FRANCE), Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Naval Group Research (FRANCE), Université du Sud Toulon-Var - USTV (FRANCE), Université de Lorraine (FRANCE), Institut Matériaux Microélectronique Nanosciences de Provence - IM2NP (Marseille, France), Service des Recherches Métallurgiques Appliquées (SRMA), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Jean Lamour (IJL), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Naval Group Research [Bouguenais], Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)
- Subjects
Nuclear and High Energy Physics ,Irradiation defects ,Materials science ,Matériaux ,Nucleation ,02 engineering and technology ,Atom probe ,01 natural sciences ,Precipitates ,Ion ,law.invention ,[SPI.MAT]Engineering Sciences [physics]/Materials ,law ,Phase (matter) ,Charged particle irradiation ,0103 physical sciences ,General Materials Science ,Irradiation ,010302 applied physics ,Precipitation (chemistry) ,Titanium alloy ,021001 nanoscience & nanotechnology ,Dislocation loops ,Nuclear Energy and Engineering ,Transmission electron microscopy ,Chemical physics ,0210 nano-technology - Abstract
International audience; Ion irradiations on the Ti6-4 titanium alloy were conducted at the JANNUS French platform in two different conditions of temperatures, doses and fluxes, to simulate neutron irradiation damage. Quantification of defects and chemical microanalyses were carried out thanks to Transmission Electron Microscopy and Atom Probe Tomography. -type loops and radiation induced precipitates (a vanadium-rich β BCC phase) were observed for both irradiation temperatures. During an irradiation at 300 °C, there was no notable influence of the dose and flux for the considered doses and fluxes ranges on the -type defects. The influence of raising the irradiation temperature up to 430 °C was a lowering of their density and an increase of their mean diameter for both defects. In addition, a lower flux seemed to enhance this temperature effect. These phenomena were very significant for precipitates whereas it appeared very modest for -type loops. The probable mechanism to explain the distribution of vanadium-rich β precipitates inside the α phase is the heterogeneous nucleation. The nucleation is dominated by the Radiation Induced Segregation (RIS) phenomenon at 430 °C and could be dominated by the mechanism of vanadium-rich clusters formation by ballistic effects in the cascades at 300 °C.
- Published
- 2018
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