Microband-Induced Plasticity in a Nb Content Fe–28Mn–10Al–C Low Density Steel

Novel Fe–28Mn–10Al–C–0.5Nb low-density steel was developed and the room temperature tensile behavior in solid solution state microstructure evolution process during plastic deformation were studied, aiming to clarify dominant mechanisms. The results show that fully austenitic with a low density of 6.63 g/cm3 fairly high stacking fault energy 84 MJ/m2. present exhibited an excellent ultimate strength 1084 MPa elongation 37.5%; addition, combination ductility (i.e., product (PSE) could reach as 40.65 GPa%). In spite energy, deformed microstructures planar glide characteristics, seemingly due plane softening effect. is attributed plasticity induced by microbands leads continuous strain hardening at temperature. Moreover, addition Nb does not change mechanism strengthening Fe–Mn–Al–C steel, can optimize mechanical properties steel.