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Modelling of transformation in TRIP steels

Research Area: TRIP Steels Year: 2004
Type of Publication: Article
Authors:
Abstract:
Industrial processing at low-alloy Transformalion Induced Plasticity (TRIP) steels involves various stages of heat-treating, such as Intercritical Annealing (IA) and Bainitic Isothermal Treatment (Bin, in order to produce a dispersion of retained austenite (YR) particles and bainite (825OC). II was also observed that kinetic and tllermodynamic predictions set a lower and an upper limit, respectively, within which the actual amount of austenite experimentally observed is contained. Results from the simulation of the BIT indicated considerable carbon enrichment, and thus stabilization of YR, in agreement with recent experimental observations. As regards the strain-induced YA-U' transformation, the analytical model employed in the present work was fitted to available experimental results, showing reasonably good adaptation to the kinetic behaviour of Ihe microstructure during plastic deformation.
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