Prediction of Flow Stress and Microstructural Evolution during Hot Forging of Three Microalloyed Medium Carbon Steels |
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| Journal | Materials Science Forum (Volumes 475 - 479) |
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| Volume | PRICM-5 |
| Edited by | Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie |
| Pages | 169-174 |
| DOI | 10.4028/www.scientific.net/MSF.475-479.169 |
| Citation | Yeon Chul Yoo et al., 2005, Materials Science Forum, 475-479, 169 |
| Online since | January, 2005 |
| Authors | Yeon Chul Yoo, S.I. Kim, Sang Min Byon, Young Seog Lee |
| Keywords | Dynamic Recrystallization (DRX), Finite Element Analysis (FEA), Flow Stress Softening, Microalloyed Medium Carbon Steel, Volume Fraction of Recrystallization |
| Abstract | A constitutive relation is proposed in this study by introducing a function prescrbing the volume fraction of dynamically recrystallized grains into the Voce’s equation to predict the stress-strain relations for three microalloyed medium carbon steels. We performed hot torsion test in temperature range of 900-1100? and strain rate range of 0.05-5.0s-1 to obtain the flow stress-strain curves. The calculated flow stresses are in good agreement with the measured ones. We have then applied the equations in FE analysis to predict the distribution of dynamic recrystallization volume fraction and flow stress for hot forging. |
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