A new temperature and strain rate dependent yielding model for iron-based body-centered-cubic metallic materials

• A decoupled modeling idea considering temperature and strain rate is proposed.
• A new temperature and strain rate dependent yielding model is developed.
• The model establishes the quantitative relationship of yield strength.
• The model is supported by iron-based body-centered-cubic metallic materials.
• Our model is convenient to apply benefit from its less fitting parameters.

In this paper, a new yielding model integrating temperature and strain rate for iron-based body-centered-cubic metallic materials is developed based on a decoupled modeling idea. The model is verified under different temperatures and strain rates by comparison with experimental data of different iron-based body-centered-cubic metallic materials. Comparisons between this yielding model and Johnson-Cook yielding model are made as well. The predicted results have an excellent consistency with experimental results, and our model could well character yield strength than Johnson-Cook yielding model. Besides, it should be noteworthy that there is only one fitting parameter in our model, while Johnson-Cook yielding model contains three fitting parameters which make it difficult to apply.