During plastic deformation, metastable austenitic stainless steels can go through a phase transformation from unstable austenite to martensite. This leads to an increase in the work hardening rate. Since steels are widely used metals, a lot of research efforts have been directed towards better understanding of their behavior. The phase transformation is one of the questions that have attracted a lot of attention from the researchers. This work focuses on studying the role of strain rate and adiabatic heating on the phase transformation from austenite to martensite during plastic deformation of metastable austenitic steels. The results will ,hopefully, help in better understanding of the phase tranformation phenomenon in stainless steels.