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Updated: May 22, 2026

Surrogate Model Development for Digital Experiments in Welding
Published on: March 28, 2025
Analysis of transformation plasticity in steel using a finite element method coupled with a phase field model
Yi-Gil Cho1, Jin-You Kim, Hoon-Hwe Cho
1Department of Materials Science and Engineering and Center for Iron & Steel Research, RIAM, Seoul National University, Seoul, Republic of Korea.
Abstract:
An implicit finite element model was developed to analyze the deformation behavior of low carbon steel during phase transformation. The finite element model was coupled hierarchically with a phase field model that could simulate the kinetics and micro-structural evolution during the austenite-to-ferrite transformation of low carbon steel. Thermo-elastic-plastic constitutive equations for each phase were adopted to confirm the transformation plasticity due to the weaker phase yielding that was proposed by Greenwood and Johnson. From the simulations under various possible plastic properties of each phase, a more quantitative understanding of the origin of transformation plasticity was attempted by a comparison with the experimental observation.
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