Posez n’importe quelle question sur les cours, conférences, exercices, recherches, actualités, etc. de l’EPFL ou essayez les exemples de questions ci-dessous.
AVERTISSEMENT : Le chatbot Graph n'est pas programmé pour fournir des réponses explicites ou catégoriques à vos questions. Il transforme plutôt vos questions en demandes API qui sont distribuées aux différents services informatiques officiellement administrés par l'EPFL. Son but est uniquement de collecter et de recommander des références pertinentes à des contenus que vous pouvez explorer pour vous aider à répondre à vos questions.
Segregation of P and Mo to prior austenite grain boundaries in a 2.25Cr1Mo steel subjected to neutron irradiation and ageing is examined using field emission gull scanning transmission electron microscopy (FEGSTEM) with energy dispersive X-ray microanalysis. The steel samples are irradiated and aged at around 270 and 400 degrees C, respectively. The irradiation dose rate and dose are about 1.05 x 10(-8) dpa s(-1) and 0.032 dpa for 370 degrees C-irradiation, and 1.75 x 10(-8) dpa s(-1) and 0.13 dpa for 400 degrees C-irradiation. The FEGSTEM results indicate that, during 270 degrees C-irradiation, there is no irradiation effect for P segregation and some effect for Mo segregation with the Mo boundary concentration decreasing. During 400 degrees C-irradiation, there is a slight irradiation effect for P segregation with the P boundary concentration increasing and some irradiation effect for Mo segregation with the Mo boundary concentration decreasing. The 400 degrees C-ageing does not enhance Mo segregation as compared with the 270 degrees C-ageing, but it enhances P segregation. (C) 2000 Elsevier Science S.A. All rights reserved.
Maximo Pedro Victoria, Nadine Baluc, Robin Schäublin
Pedro Miguel Rodrigues de Almeida