Role of Nb Addition on Microstructural Stability and Deformation Behaviors of FeMnAlC Lightweight Steels at 400 °C

As part of efforts to fabricate FeMnAlC lightweight steels suitable for high-temperature applications, the influence of Nb addition on the microstructure and tensile deformation behaviors has been investigated. Electron backscattered diffraction analysis showed that Fe–20Mn–8Al–1.0C base steel consisted of a full austenite matrix after solution treatment, and the addition of 0.1 wt pct Nb resulted in grain refinement from 56 to 23 μm without...