Orientation dependence of yield strength in a new single crystal-like FeCrAl oxide dispersion strengthened alloy

Abstract

In the current study, new advanced oxidation-resistant FeCrAl oxide dispersion strengthened (ODS) alloys were developed via the control of composition-processing conditions for nuclear energy systems. For the first time, a single-crystal like recrystallized FeCrAl ODS alloy was achieved with a unique crystallographic texture of (110) 〈211〉 and a high number density of fine nanoscale oxide particles. Evaluation of yield strengths at different temperatures showed higher values in transverse direction than longitudinal direction. The orientation dependence of yield strength up to 800 °C was attributed to lower value of Schmid factor in transverse direction. Accordingly, the critical resolved shear stress of this practical class of advanced materials was calculated in various temperatures.