Strain Hardening Behavior Prediction Model For Automotive High Strength Multiphase Steels

Abstract

The present paper aims at analyzing the flow curves of DP and TRIP steels obtained by uniaxial tensile tests by proposing a strain hardening prediction model. This has been built by using a very simple interpolation formula based on a third-order polynomial whose parameters have been determined by linear regression analysis on the basis of chemical composition and mechanical properties. The chosen interpolating formula has demonstrated to very effectively reproduce both the stress-strain curve and its derivative, thus providing a easy tool to predict the strain hardening behavior of DP and TRIP multiphase steels that could be usefully used in industrial application for the simulation of drawing processes.