Flow curves of ferrite/pearlite two-phase steels were simulated using finit
e element method (FEM) with regression equations for flow curves of each fe
rrite and pearlite phase proposed by Hiramatsu et ai. and Furukawa et ai. T
he calculated flow strength of ferrite/pearlite two-phase steel was lower t
han the experimentally measured one mainly due to the underestimation of fl
ow strength of ferrite phase according to the yield elongation. To improve
the simulation, the flow curves in homogeneous deformation range were consi
dered. Microscopic observations revealed that most deformation was accumula
ted in the ferrite phase during yield elongation. Flow curves of ferrite ph
ase were re-evaluated based on this observation and flow curves of ferrite/
pearlite steels were also re-calculated. Re-calculated yield strength of fe
rrite/pearlite steels showed good agreement with measured ones, however the
work hardening rate of re-calculated flow curves is still lower than that
of measured one. The simplicity of pearlite morphology for FEM analysis is
thought to be responsible for lower work hardening behavior of calculated f
low curve by FEM than that of measured one.