Prediction of Flow Stress and Microstructural Evolution during Hot Forging of Three Microalloyed Medium Carbon Steels

Yeon Chul Yoo; S.I. Kim; Sang Min Byon; Young Seog  Lee

doi:10.4028/www.scientific.net/MSF.475-479.169

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HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Prediction of Flow Stress and Microstructural...

Prediction of Flow Stress and Microstructural Evolution during Hot Forging of Three Microalloyed Medium Carbon Steels

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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Materials Science Forum (Volumes 475-479)

Pages:

169-174

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.169

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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

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