A comparative study on Johnson-Cook constitutive modeling for Ti-6Al-4V alloy using automated ball indentation (ABI) technique

作者：Wang Fuzeng; Zhao Jun^*; Zhu Ningbo; Li Zuoli

来源：Journal of Alloys and Compounds, 2015, 633: 220-228.

DOI：10.1016/j.jallcom.2015.01.284

• Ball indentation test
• Constitutive model
• Flow stress
• Ti-6Al-4V alloy

In this study, automated ball indentation (ABI) technique has been employed to explore the flow behavior of Ti-6Al-4V alloy at low strain rates and elevated temperatures. Isothermal ABI tests have been performed in a wide range of temperatures (293 K, 493 K, 693 K, and 873 K) and strain rates (10(-6), 10(-5) and 10(-4) s(-1)). Based on the experimental true stress-plastic strain data derived from the ABI tests, Johnson-Cook (J-C) constitutive model has been employed to predict the flow behavior of Ti-6Al-4V alloy at low strain rates and elevated temperatures. A comparative study has been made to verify the applicability of current J-C models at low strain rate based on finite element method (FEM). The results show that the predicted values by the Johnson-Cook constitutive model agree well with the experimental data, and the automated ball indentation (ABI) technique could give a precise prediction of the flow behavior of Ti-6Al-4V alloy at low strain rates and elevated temperatures.

• 出版日期2015-6-5
• 单位山东大学