|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Void Swelling Evolution and Radiation-induced Segregation & Precipitation in Self-ion Irradiated Ferritic/Martensitic HT9 Steel
||Ce Zheng, Djamel Kaoumi
|On-Site Speaker (Planned)
Ferritic/Martensitic HT9 steel was irradiated to 16.6 dpa at 600nm at 432°C using a defocused beam of 5 MeV Fe++ ions, while co-implanted with 3.22 appm He at 600nm depth. Radiation induced segregation was observed along with swelling. Depth-dependent evolution of cavity size and number density were characterized by both TEM and STEM imaging methods with good agreement between the two techniques. The injected interstitial effect was observed and discussed. The region between 300 and 750 nm depth was thus proposed for improved void swelling analysis. The swelling ratio in this region was found to be ~0.861-1.02×10-2 %/dpa. In addition, ChemiSTEM characterization revealed radiation-induced segregation occurring throughout the irradiated region and precipitation of G-phase particles. Segregation of Ni to void surfaces was also observed and its possible synergistic influence on swelling is discussed.
||Planned: Supplemental Proceedings volume