|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||Microstructure and Mechanical Behavior of ECAP and HPT Processed Austenitic and Ferritic-martenstic Steels
||Haiming Wen, Rinat K. Islamgaliev, Marina Nikitina
|On-Site Speaker (Planned)
Austenitic and ferritic-martenstic steels have important applications in current and advanced nuclear reactors, however, their irradiation tolerance and mechanical properties need to be improved. Bulk nanostructured metals possess dramatically higher strength than their conventional coarse-grained counterparts, and have significantly enhanced irradiation tolerance due to significant volume fraction of grain boundaries that serve as sinks or recombination centers for radiation-induced defects. In this study, austenitic and ferritic-martenstic steels were processed by equal-channel angular pressing (ECAP) and high-pressure torsion (HPT). The microstructure and mechanical behavior (tensile and creep behavior) of the ECAP and HPT processed steels were carefully studied, and their thermal stability was also investigated. Advanced microstructural characterization techniques such as high-resolution transmission electron microscopy, atom probe tomography and precession electron diffraction were utilized to investigate grain sizes/morphologies, dislocations, grain boundary characteristics, solute segregation at grain boundaries, pre-existing precipitates, and phase boundaries. Neutron irradiation has been planned to study irradiation behavior.
||Planned: Supplemental Proceedings volume