LAWS OF THERMAL-BEHAVIOR WITH DYNAMIC REC RYSTALLIZATION - APPLICATION TO HIGH-PURITY IRON-ALLOYS

A constitutive relationship for predicting the flow stress with dynami c recrystallization were proposed. The approach is based on a phenomen ological formalism of the law theta-epsilon where theta correspond to the work-hardening rate at constant strain rate and temperature. The e quations proposed were justified by the experimental data collected by hot compression test of low-alloy steels. The model can be used to es timate the critical strain for the onset of dynamic recrystallization.