Abstract
The constitutive model was commonly used to describe the flow stress of materials under specific strain, strain rate, and temperature conditions. In order to study the thermal-mechanical behavior of DH460 continuous casting steel during the solidification end heavy reduction (HR) process accurately. The high-temperature compression experiment was carried out, and phenomenological constitutive models were established based on the experimental results. A new strain-strengthening factor (D(ε)) was proposed in order to improve the prediction accuracy of the current constitutive models. Then, the further-modified models were established. It was found that the new strain-strengthening factor significantly reduced the error of models. The average relative error (AARE) of the further-modified Johnson-Cook model and the further-modified Zerilli-Armstrong model were 6.27% and 5.54%, respectively. The results showed that the further-modified models were more suitable for describing the constitutive behavior of DH460 continuous casting steel during the solidification end reduction.
Published Version
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