1. Study of solute segregation behavior at carbide–ferrite interfaces in 16MND5 welds
- Author
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Yang Shen, Leifeng Zhang, Bertrand Radiguet, Christophe Domain, Philippe Pareige, Patrick Todeschini, Groupe de physique des matériaux (GPM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Matériaux et Mécanique des Composants (EDF R&D MMC), EDF R&D (EDF R&D), EDF (EDF)-EDF (EDF), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), EDF (EDF), and ANR-11-EQPX-0020,GENESIS,Groupe d'Etudes et de Nanoanalyses des Effets d'IrradiationS(2011)
- Subjects
010302 applied physics ,Nuclear and High Energy Physics ,Materials science ,Cementite ,02 engineering and technology ,Atom probe ,Intergranular corrosion ,021001 nanoscience & nanotechnology ,01 natural sciences ,Carbide ,law.invention ,chemistry.chemical_compound ,Nuclear Energy and Engineering ,chemistry ,Chemical physics ,law ,Ferrite (iron) ,0103 physical sciences ,[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] ,General Materials Science ,Grain boundary ,0210 nano-technology ,Embrittlement ,Vicinal ,ComputingMilieux_MISCELLANEOUS - Abstract
The solute segregation behavior at two types of carbide–ferrite interfaces was investigated by Atom Probe Tomography (APT) technique in a 16MND5 weld before and after ion irradiation. The two types of carbides are cementite and M2.0-3.2C carbides. Effects of these intergranular carbides on solute segregation behavior at the vicinal Grain Boundaries (GBs) were discussed. No influence was observed within the first tens of nm away from carbides. However, these carbides introduce effective sites for solute segregation (P, Mn, Si and Ni). The segregation of one or several chemical species was observed at interfaces. It is also revealed that the intersection region between carbide and the adjacent GB favors higher P segregation than any other region. After ion irradiation, there is a significant increase of P segregation level at both cementite-ferrite interfaces and M2.0-3.2C carbide–ferrite interfaces, which could be attributed to a Radiation Enhanced Segregation (RES) of P. The increased P segregation at interfaces could contribute to the radiation embrittlement. Under both conditions, there is a higher average P segregation level at cementite-ferrite interfaces than M2.0-3.2C carbide–ferrite interfaces.
- Published
- 2020