|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accident Tolerant Fuels for Light Water Reactor
||Quantitative Characterization of Y and Ti Inclusions in a 14Cr-YWTi Nanostructured Ferritic Alloy and their Effect on High Temperature Fracture
||Soupitak Pal, MD Eshradul Alam, G Robert Odette
|On-Site Speaker (Planned)
A 14Cr-Y-W-Ti nanostructured ferritic alloy (FCRD NFA-1) containing Y- and Ti-rich inclusions is quantitatively characterized. The inclusion sizes range from 10-260 nm and they align in stringers along the deformation directions. The inclusions are initiation sites for ductile fracture by nucleation, growth and coalescence of microvoids. The inclusions are primarily observed on grain boundaries and at triple junctions. Their number densities, sizes, volume fractions, spatial distributions, structures and compositions are characterized using a combination of SEM and TEM (EELS and HRTEM), both in the as fabricated condition and after annealing at 1300°C for 5h. The number densities and sizes of the inclusions decrease and increase, respectively, following annealing. These microstructures are correlated with the high-temperature ductile fracture properties, based on extensive quantitative fractography. The formation and stability of the inclusions is discussed in terms of Fe-Cr-Y-Ti-O phase diagram, to guide the design cleaner NFAs with improved high-temperature properties.
||Planned: Supplemental Proceedings volume