TY - JOUR ID - 23708 TI - Exponential-type Constitutive Equation in Order to Use in Modeling the Warm Deformation of a Eutectoid Steel JO - International Journal of Iron & Steel Society of Iran JA - IJISSI LA - en SN - 2981-0388 AU - Rakhshkhorshid, M. AU - Rastegari, H. AD - Department of Mechanical and Materials Engineering, Birjand University of Technology, South Khorasan, P.O. Box 97198-66981, Iran AD - Department of Mechanical and Materials Engineering, Birjand University of Technology, P.O.Box: 97175-569, Birjand, Iran Y1 - 2016 PY - 2016 VL - 13 IS - 2 SP - 13 EP - 18 KW - Warm deformation KW - Flow stress KW - Exponential-type constitutive equation KW - Eutectoid steel KW - Dynamic spheroidization DO - N2 - 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. UR - https://journal.issiran.com/article_23708.html L1 - https://journal.issiran.com/article_23708_22377746297679b6cb19675bf4db0045.pdf ER -