Abstract
The capabilities of the commonly encountered Johnson-Cook and Arrhenius-type constitutive equations to describe the warm deformation flow curves of an eutectoid steel undergoing dynamic spheroidization have been compared based on the warm compression test data. Warm compression tests were conducted over the temperature range 620-770 °C and strain rates in the range of 0.01-10 s−1. The average absolute relative error values for the Johnson-Cook and Arrhenius-type constitutive equations were 44.03 and 6.50%, respectively, thereby showing that the Arrhenius-type constitutive equation is to be preferred. It is also shown that in contrast to the Arrhenius-type constitutive equation, the softening caused by dynamic spheroidization cannot be modeled using the Johnson-Cook equation.
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Rastegari, H., Rakhshkhorshid, M., Somani, M.C. et al. Constitutive Modeling of Warm Deformation Flow Curves of an Eutectoid Steel. J. of Materi Eng and Perform 26, 2170–2178 (2017). https://doi.org/10.1007/s11665-017-2609-7
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DOI: https://doi.org/10.1007/s11665-017-2609-7