RT Journal Article
T1 Effects of single- and simultaneous triple-ion-beam irradiation on an oxide dispersion-strengthened Fe12Cr steel
A1 Castro Bernal, María Vanessa de
A1 Lozano Pérez, Sergio
A1 Briceno, Martha
A1 Trocellier, Patrick
A1 Roberts, Steve G.
A1 Pareja Pareja, Ramiro
AB Oxide dispersion-strengthened (ODS) steels are main candidates for structural applications in future fusion reactors. Understanding their irradiation-induced behaviour is a key in building optimised components with enhanced radiation resistance. In this work, the stability of an ODS Fe12Cr steel was investigated by transmission electron microscopy after single- (Fe4+) and simultaneous triple-ion-beam irradiation (Fe8+, He+ and H+) at room temperature to doses of 4.4 and 10 dpa. The irradiations were accomplished at the JANNUS-Saclay facility. Results after single-ion-beam irradiation were also compared with those from a reference Fe12Cr steel produced following the same route. Analyses focused on determining the irradiation-induced loop size and density in the ODS and reference materials, investigating the grain boundary microchemistry and studying the evolution of the secondary phases present. These experiments show that the Y-rich nanoparticles present in the ODS steel are quite stable under these irradiation conditions although evolution of larger Cr-rich carbides could be taking place. Loop sizes are smaller for the ODS steel than for the reference material and appear to increase with dose. Cr segregates at some of the grain boundaries, though this segregation also occurs in the absence of irradiation.
PB Springer
SN 0022-2461
YR 2015
FD 2015-03-01
LK https://hdl.handle.net/10016/31970
UL https://hdl.handle.net/10016/31970
NO This investigation was supported by the Ministerio de Ciencia e Innovación (Contract ENE2010-17462), the European Commission through the European Fusion Development Agreement (EFDA), the EPSRC Grant No. EP/H018921/1, the FP7-EU Program under Grant Agreement 312483 - ESTEEM2 (Integrated Infrastructure Initiative-I3) and the Royal Society International Exchanges Scheme 2011/R1 (ref. IE110136).
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