Microstructural characterization and recrystallization kinetics modeling of annealing cold-rolled vanadium microalloyed HSLA steels

Abstract

In this study, we investigated the microstructural evolution and recrystallization kinetics during the annealing of cold-rolled Vanadium microalloyed HSLA (denoted as HSLA-V) steels using both experimental characterization techniques and theoretical model analysis method. Our experimental results indicate that the recrystallization kinetics can be quantified with the evolution of volume fraction of recrystallization as a function of annealing time, and is strongly dependent on the processing parameters (i.e., cold-rolling reduction and annealing temperature) of the HSLA-V steels. Validated by experimental data, our physics-based model analysis revealed that the recrystallization process in the HSLA-V steels consisted of an early stage with both nucleation and grain growth processes and a later stage with grain growth only. Moreover, the growth of the recrystallized grains was found to follow one dimensional preferential growth mechanism, owing to the dispersed V(C,N) precipitates, in the HSLA-V steels. Consequently, our new analysis model is demonstrated to be useful to gain insights into the recrystallization kinetics in the annealed cold-rolled HSLA-V and even other microalloyed steels.

A Physics-Based Mean-Field Model for Ferrite Recovery and Recrystallization

“…This function must also be calibrated for each steel and for each initial deformation state. Moreover, Liu et al [19] have highlighted that the recrystallization process can show two stages, the first one controlled by both nucleation and growth and the second by the growth only (saturation of nucleation site). The independent modeling of both mechanisms is thus of the greatest interest for capturing such fine features.…”

Proposition of an Empirical Functional Equation to Predict the Kinetics of Austenite to Ferrite Transformation in a Continuous Cooled IF-Ti-Stabilized Steel

“…In this context, many researchers have been studying this problem until nowadays, and have been proposing physical models to predict the kinetics of phase transformation under continuous cooling. However, most part of this physical models are very complex, assume many physical simplifications and require powerful computational resources, making them difficult to apply in the industrial environment 3,5,[11][12][13][14][15][16][17][18][19] .…”

Application of Computer Simulation to Study the Features of the Austenite Isothermal Transformation in Steels

“…Some researchers [23,24] The Ural school-seminar of metal scientists-young researchers For example, when the logistic Eq. 4 [17] is used to analyze the same experimental and simulated transformation kinetics the resulting logarithmic plots do not have any inflection or other features.…”