Continuous magnetic method for quantitative monitoring of martensitic transformation in steels containing metastable austenite

A fast and accurate in situ magnetic method has been developed. This technique is suitable for obtaining the continuous kinetics of the martensitic transformation that occurs during deformation in steels containing metastable austenite, like TRIP steels; it could also be very helpful in studying the austenite stability when designing/optimizing such steels. The results are successfully compared to those of a static magnetic measurement method, which also allows the investigation of the effects of test temperature and stress triaxiality on the phase transformation kinetics.