Modelization and comparison of Norton-Hoff and Arrhenius constitutive laws to predict hot tensile behavior of Ti-6Al-4V alloy

作者：Zhang Chao; Li Xiao-qiang^*; Li Dong-sheng; Jin Chao-hai; Xiao Jun-jie

来源：Transactions of Nonferrous Metals Society of China, 2012, 22: S457-S464.

DOI：10.1016/S1003-6326(12)61746-4

• Ti-6Al-4V alloy
• hot tensile behaviour
• constitutive model
• modelization
• Arrhenius model
• compensation of strain
• modified Norton-Hoff model

In order to study the workability of Ti-6Al-4V alloy in the hot forming process for sheets and profiles, the stress-strain experimental data from isothermal hot tensile tests of flat specimens, in the temperature range of 923-1023 K and strain rate range of 0.0005-0.05 s(-1) were used to develop the constitutive equation. Arrhenius and Norton-Hoff constitutive models were proposed to characterize the tensile behavior. The fitting results suggest that both Arrhenius constitutive equation (material constants consider the compensation of strain) and modified Norton-Hoff one can predict flow stress of Ti-6Al-4V alloy under most experimental conditions. Further, the modified Norton-Hoff model is more accurate and precise than Arrhenius model.

• 出版日期2012-12
• 单位北京航空航天大学