JOURNAL DE PHYSIQUE IV Colloque C8, supplkment au Journal de Physique III, Volume 5, dkcembre 1995 Carbon Diffusion and Kinetics During the Lath Martensite Formation

Abstract. Calculations verify that carbon diffusion may occur during the lath martensite fom-tion. Accordingly,the diffusion of int2rstitial at- or ions must be taka into account nhfn martmitic transformtion is defined as a diffusionless transformation. In derivation of the kinetics equation of the ath & martensitic transfomtion,rzgardng the c a r h diffusion, i.e.the enrichment of the austenite during the lath martensite formtion, and form being function of the temperature and the carbon content in austenite, the kinetics equation is modified to a genera. form as