|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Deformation and Transitions at Interfaces
||Structure of Semicoherent U-Zr Interfaces.
||Elton Y Chen, Remi Dingreville, Chaitanya Deo
|On-Site Speaker (Planned)
A quantitative understanding of the compositional and microstructural features dictating fuel/clad heterophase interfaces is necessary for assessing the stability and aging of spent nuclear fuel. Specifically, the presence of misfit dislocations in such semicoherent interfaces play an important role in their physical-mechanical properties. The structure of these interfaces depends on the physical and chemical nature of the contacting phases (including size and symmetry of elementary crystal cells) but also on external factors such as temperature for example. The non-uniform structure of semicoherent bcc/bcc U-Zr interfaces is studied using molecular dynamics simulations. Misfit dislocation patterns and their characters as well as their associated elastic lattice distortions are investigated as a function of various interfacial misfit strains and surface orientations. Results from the atomistic model will be compared with classical elasticity theories to highlight their implications for the relief of coherency stresses at interfaces, and for their mechanical properties.