Flow Stress Modeling in Low Carbon Titanium-Vanadium Microalloyed Steel

doi:10.12068/j.issn.1005-3026.2016.05.007

Abstract

Abstract: Using the single-pass compression experiment， the stress-strain behavior of austenite in a low carbon titanium-vanadium microalloyed steel was studied. The investigated temperature and strain rate were in a range of 1 173~1 373K and 0.1~10s^-1， respectively. The deformation activation energy Q_def and Zener-Hollomon parameter were determined according to Akben’s work which quantified the drag effect of solutes on the dynamic recrystallization. Based on Jonas’ analysis， the recovery parameters r and r’， yield stress σ₀， saturation stress σ_sat， and the critical stress for dynamic recrystallization σ_c were formulated as functions of Z-parameter and then the kinetics for dynamic recrystallization was derived. Eventually， a flow stress model was established.

Key words: titanium-vanadium microalloyed steel, dynamic recrystallization, flow stress, mathematical model, single-pass compression

CLC Number:

TG111.5

SHEN Ji-cheng， JIA Tao， LIU Zhen-yu. Flow Stress Modeling in Low Carbon Titanium-Vanadium Microalloyed Steel[J]. Journal of Northeastern University Natural Science, 2016, 37(5): 638-642.

References

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