Modeling Dynamic Recrystallization Kinetics in BS 080M46 Medium Carbon Steel: Experimental Verification and Finite Element Simulation

Abstract

Utilized the experimental data to construct models that describe DRX kinetics and the evolution of grain size, employing the Johnson-Mehl-Avrami-Kolmogorov (JMAK) equation, this study investigates the dynamic recrystallization (DRX) characteristics and the microstructure evolution within BS 080M46 medium carbon steel under high-temperature conditions. Several trials were carried out to analyze hot compression, covering a temperature range of 900°C to 1200°C and utilizing varying strain rates of 0.1, 1, and 10 s-1. The incorporation of these models into QForm V10.2.1 facilitated finite element modeling (FEM) simulation, enabling the evaluation of DRX behavior. A comparative analysis was carried out to confirm the efficacy of the developed models, aligning the simulation results with the data obtained through metallographic observations. The high level of agreement between the simulation and experimental findings related to the DRX grain size was quantified by a correlation coefficient (R) of 0.991, along with an average absolute relative error (AARE) of 7.412%. These results confirm the capability of the developed DRX kinetics and grain size evolution models in accurately predicting the grain size of BS 080M46 medium carbon steel.  In addition, the study suggests that higher temperatures or lower strain rates can result in an increased volume fraction of dynamic recrystallization (DRX) and grain size. This highlights the importance of Finite Element Method (FEM) as a crucial tool for comprehending the evolution of microstructure during hot working processes.

Keywords

• bs 080m46 medium carbon steel
• drx behavior
• finite element modeling
• grain size
• hot compression test