|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Irradiation-induced Phase Reversal and Grain Boundary Formation in U-alloys
||Yipeng Gao, Yongfeng Zhang
|On-Site Speaker (Planned)
The microstructure evolution in U-Mo plays a critical role on the fuel performance in nuclear reactors, which could involve a series of unique physical processes under irradiation condition. We develop a phase field model to investigate the effects of irradiation-induced phase reversal, which suggests a strong correlation between the phase transformation and sub-grain formation. Combined with crystallographic analysis, a new formation mechanism of the sub-grain structure as well as special grain boundaries is proposed. It is found that the sub-grain formation originates from the symmetry breaking, and the type of grain boundary is dictated by the broken symmetry during the phase reversal. This study provides a new insight into the understanding of grain boundary generation during structural phase transformations especially in nuclear materials.
||Planned: Supplemental Proceedings volume