Work hardening and uniform elongation of an ultrafine-grained Fe–33Mn binary alloy

The grain-refinement effect on uniform elongation was examined in an Fe–33 wt%Mn alloy. The uniform elongation was 30% even in 0.7 μm grain size. No deformation-induced martensite and twins were observed; the significant uniform elongation was found to arise from formation of numerous stacking faults in the ultrafine-grained structure.