Computer simulations of austenite decomposition of microalloyed 700 MPa steel during cooling

Numerical experiments on the solution of advection equation for moving phase interface: Encountered problems and their solutions

“…The time evolution was calculated using by applying Eq. ( 4) and (5), where the spatial derivative was averaged. The clipping of the function values was applied: if 𝑓 > 0 then 𝑓 was set to 1.…”

“…Previous experiments and numerical simulations [2] show that also differential cooling rates could be applied to controlledly create desired heterogeneous microstructure to the material. Furthermore, due to its effect on the mechanical properties, the microstructure development during processing [3][4][5][6] needs to be understood in detail in order to control it effectively. The continuous development of accurate mean field models [7,8] also requires input from detailed microstructure formation models [9], where the phase front propagation needs to be explicitly modeled.…”

In-Situ Sem Characterization and Numerical Modelling of Bainite Formation and Impingement of a Medium-Carbon, Low-Alloy Steel

“…The mean field (MF) model described in references [14,17,19,39] was applied to simulate the overall austenite to bainite transformation during cooling, and it was applied in designing the cooling path used in the experiments. The MF model describes the instantaneous overall transformation rate as a function of the temperature and the previously transformed phase fraction.…”

“…We have previously developed a coupled heat conduction and mean field (MF) phase transformation model [14][15][16][17], that has been applied for simulating austenite decomposition in cooling of a steel coil [15] as well as in slow cooling of low temperature ausformed steel, which leads to the formation of fine bainitic structure [18]. The mean field phase transformation model has been also used for simulating microstructure evolution to aid the design of induction hardening of a medium carbon pipeline material [19] where the model can be used for optimizing the cooling path and strategy so that desired fractions of different phases can be obtained [20,21] through the pipe thickness.…”

Numerical Modelling of Thermo-Mechanical Processes in Steels - An Overview and Recent Progress

“…In [16,[28][29][30] we presented the general framework for coupled heat conduction and mean field phase transformation simulations, where the phase transformation model was calibrated to the experiments. The models have been applied to aid for understanding the phase transformation behavior in industrial and laboratory scale processes [19,[31][32].…”