A Study on the Optimal Stress Compensation to Dynamic Recrrystallization for the Estimation of Forming Loads

성형하중예측을 위한 재결저분율 보상의 최적조건 도출

The effect of dynamic recrystallization during hot forming process was implemented to a commercial FEM code by conditioned remeshing and remapping of sate variables. A datum strain for stress compensation was determined as a strain for maximum softening rate and was able to be formulated as a function of critical strain f($\varepsilon$). The validity of remapping criterion was examined by a series of mechanical tests and microstructural observation. The application of suggested datum resulted in better estimation of load-stroke during forging processes.