Phase-field simulation of dynamic recrystallization process for SA508-3 steel

doi:10.13251/j.issn.0254-6051.2020.10.040

Abstract

Abstract: A multi-phase-field(MPF) model was adopted to simulate the growth of dynamical recrystallization (DRX) grains and the Kocks-Mecking(KM) equation to model the mechanical behavior. Hot compression tests under various temperatures and strain rates were carried out by using a thermo-mechanical simulator to obtain the flow stress-strain curves, from which the MPF-DRX simulation model parameters for SA508-3 steel were extracted and calculated. The microstructure evolution and the flow stress-strain curves in hot plastic deformation process predicted by the MPF-DRX simulation agree well with the experimental results. Both the experimental and numerical simulation results indicate that the flow stress increases with the increase of strain rate as well as with the decrease of deformation temperature. The strategy of the present study can be used to study the DRX behavior of other materials and provide a guidance for optimizing hot forging processes.

Key words: SA508-3 steel, dynamic recrystallization, multi-phase-field simulation, flow stress, microstructure evolution

CLC Number:

TG111.7

Xu Ting, Li Meie, Wu Bingjie, Du Hua, Wang Xiaotong, Fang Liang. Phase-field simulation of dynamic recrystallization process for SA508-3 steel[J]. Heat Treatment of Metals, 2020, 45(10): 204-211.

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