Strain or stress induced martensitic transformation (SIMT) in unstable or metastable austenite accelerates strain hardening during deformation , resulting in a concurrent increase in the strength and ductility in what is known as transformation induced plasticity (TRIP). TRIP effects are reported to diminish at high strain rates, especially causing drastic decreases in the ductility of the materials. The majority of explanationsof the diminishing TRIP effects at high strain rates refer to adiabatic cheating , which in- duces the stabilization of austenite and, in turn , the suppression of SIMT . The stacking fault energy (henceforth SFE) is acommonme a- sure of austenite stability such that SIMT and mechanical twinning predominantly occur during deformation at low SFE levels (o20 m J/m2) and intermediate SFE levels(20–50 mJ/m2), respectively . SFE not only depends on the composition but it also increases with an increase in the temperature. At high strain rates