|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||2018 Technical Division Student Poster Competition
||SPG-40: Radiation Resistant Nanostructured 304 Austenitic Steel Prepared Using ECAP and HPT
||Andrew K Hoffman, Haiming Wen
|On-Site Speaker (Planned)
||Andrew K Hoffman
For current light water reactors (LWRs), austenitic steels are important in core internal structural materials. To extend the lifetime of reactors, LWRs require steels with enhanced irradiation tolerance and higher strength. Previous studies have shown that grain boundaries act as radiation-induced defect sinks. A new generation of nanostructured materials is being developed with decreased grain size to increase grain boundary volume fraction. The presented study shows results of a 304 austenitic steel subjected to severe plastic deformation (SPD) using two techniques: high pressure torsion (HPT) and equal channel angular pressing (ECAP). These techniques have been proven effective for grain refinement. Pre-irradiation characterization was carried out using micro-hardness testing, x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and related techniques. Preliminary results from ion irradiation experiments will also be discussed.