The Stability of 9Cr-ODS Oxide Particles Under Heavy-Ion Irradiation

摘要: An oxide-dispersion-strengthened (ODS) martensitic steel 9Cr-ODS was irradiated with 5-MeV Ni ions at 500 C a dose rate of 1.4 ? 10-3 dpa/s to doses 5, 50, and 150 dpa. The ODS has been designed for use in higher-temperature energy systems. However, the radiation effects are not fully characterized, particularly high doses. Dense dislocations, precipitates, yttrium-titanium oxide particles dominated microstructure both unirradiated cases no dislocation loops observed. No voids were detected up average size particles, whose is approximately described by lognormal distribution, slightly decreased from {approx}12 nm case {approx}9 decrease follows square root dependency, indicating effect induced. expected have detrimental on high-temperature strength, even extremely dose.