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Reasons for substution of Al and/or Si by P in TRIP steel were described.The details in thermodynamic and kinetic analyses and model parametre for the estimation,as well as the calculation results were listed.Low temperature tests were also shown to support the calculation result.Strengthening mechanism for different composition high Mn steels was discussed based on the optical micrograph,XRD,TEM and SEM measurements.It was therefore realized stack fault and its effect in phase transformation in high Mn steel was in the dependence of composition,strain and heat treatment.
Reasons for substution of Al and / or Si by P in TRIP steel were described. Details in thermodynamic and kinetic analyzes and model parametre for the estimation, as well as the calculation results were listed. Low temperature tests were also shown in support of the calculation result.Strengthening mechanism for different composition high Mn steels was discussed based on the optical micrograph, XRD, TEM and SEM measurements. It was therefore caused stack fault and its effect in phase transformation in high Mn steel was in the dependence of composition, strain and heat treatment.