|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Microstructural and Nanoindentation Properties of a Lanthanum-containing Nanostructured Ferritic Steel Irradiated by High Dose Iron Ions
||Somayeh Pasebani, Indrajit Charit, Yaqiao Wu, Jatuporn Burns, Darryl P. Butt, James I. Cole, Lin Shao
|On-Site Speaker (Planned)
A nanostructured ferritic steel with a nominal composition of Fe-14Cr-1Ti-0.3Mo-0.5La2O3 (wt.%) was irradiated with Fe+2 ions at 475C for 100, 200, 300 and 400 dpa. Grain coarsening was observed for the samples irradiated for 200-400 dpa with an increase in the average grain size from 152 nm to 620 nm likely due to the coarsening of Cr-O rich nanoparticles (NPs). Dislocation density consistently increased with increasing irradiation dose at 300 and 400 dpa. The mean radius of lanthanum-containing nanoclusters (NCs) decreased and their number density increased above 200 dpa, which is likely due to solutes ejection caused by ballistic dissolution and irradiation-enhanced diffusion. Chromium, titanium, oxygen and lanthanum content of nanoclusters irradiated at 200 dpa and higher got reduced by almost half the initial value. The reduction nanocluster size accompanied with their higher number density and higher dislocation density led to significant radiation hardening with increasing radiation doses.
||Planned: Supplemental Proceedings volume