Prediction of flow stress at hot working condition

摘要

A mathematical model has been developed to determine flow stress at hot deformation condition. The proposed model is capable of including work softening due to dynamic phase transformations as well as the effect of temperature and strain rate variation on flow stress utilizing the additivity rule for strain. To verify the model. hot compression tests for two grades of steels has been carried out. The comparison between the experimental and theoretical results confirms the validity of the model. (C) 2002 Elsevier Science Ltd. All rights reserved. [References: 12]