Effect of zirconium content on mechanical properties of ODS FeCrAl alloy

The aim of this work is to investigate the effect of zirconium content on the mechanical properties of ODS FeCrAl alloys, a kind of promising cladding materials for advance nuclear energy system. Four 13Cr5Al-ODS alloys with different Zr contents (0, 0.3, 0.6 and 1.2 wt%, respectively) were fabricated by mechanical alloying (MA) and hot isostatic pressing (HIP). The mechanical properties at different temperatures were measured, then microstructures were characterized and compared by SEM and TEM to figure out the relationship between composition and mechanical properties. The results show that when adding 0.6 wt% Zr, the sample shows the highest number density of dispersed particles, reaching 1.103 × 1023/m3. Furthermore, its room temperature tensile strength reaches 1012.94 MPa while maintaining a high elongation of 16%. Likewise, the strength advantage of this sample is more obvious at high temperature.