Kinetics of the formation of bainite and packet martensite: I. Effect of the structure of packets

Experimental data on the kinetics of the isothermal formation of bainite an d martensite in low-carbon alloys Fe-9.38% Cr and Fe-14.95% Ni are presente d. Kinetic models of the formation of bainite and packet martensite that al low for a complex hierarchy of the packet structure are suggested. On the b asis of experimental data, the power n in the Avrami equation was shown to change upon transformation from n approximate to 2 to n approximate to 1. T he models developed explain the observed values of n and their change upon the transformation.