|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Nanostructured Materials for Nuclear Applications
||Deformation Mechanisms of ODS Nanostructured Ferritic Steels
||Mercedes Hernández-Mayoral, Elvira Oñorbe, Marta Serrano
|On-Site Speaker (Planned)
ODS nanostructured ferritic steels are candidate materials for fuel cladding applications in generation IV nuclear reactor systems. The fabrication methods of cladding tubes and extruded bars lead to a deformation induced anisotropic microstructure which degrades the mechanical behaviour in the hoop direction. Mechanical tests and microstructural characterization is being performed on Fe14Cr-ODS steels in the form of bars, provided by CEA (France), to address the anisotropy effect as it this a key issue in the development of cladding ODS tubes. The microstructural anisotropy leads to a lower ductility in the transverse direction that also affects the fracture mode. The dislocation structure is being examined on already tested tensile specimens to provide evidence of deformation and strengthening mechanisms contributing to the observed mechanical behavior. Complementary work by synchrotron techniques and TEM in-situ straining experiments to study the dynamical behavior of dislocations at different temperatures will be presented.
||Planned: A print-only volume