Exponential-type Constitutive Equation in Order to Use in Modeling the Warm Deformation of a Eutectoid Steel
نویسندگان
1 Department of Mechanical and Materials Engineering, Birjand University of Technology, South Khorasan, P.O. Box 97198-66981, Iran
2 Department of Mechanical and Materials Engineering, Birjand University of Technology, P.O.Box: 97175-569, Birjand, Iran
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چکیده
The main contribution of the present work is to investigate the capability of exponential-type constitutive equationto model the warm deformation flow curves of a eutectoid steel in the temperature range of 620-770 °C andat the strain rates in the range of 0.01-10 s-1 conducted on a Gleeble-1500 thermomechanical simulator. Warmdeformation in this temperature range facilitates the occurrence of dynamic spheroidization of cementite lamellaeas a softening process as well as some instabilities and microstructural defects. The prediction capability of theexamined model was assessed using the average absolute relative error (AARE) criterion. The obtained AAREwith the value of 7.39% for warm deformation modeling of the tested steel showed the acceptable performance ofthe examined model.
