Formulation of martensitic transformation under one-dimensional impact

This paper deals with the quantitative prediction of the volume fraction of martensitic transformation in austenitic steel that undergoes one-dimensional impact with high strain rate. The coupling relations among strain, stress, strain rate, transformation rate and transformed fraction were derived from the OTC model and modified Bodner-Partom. equations, where the impact process was considered as an adiabatic. The agreement between numerical calculation and experimental result illustrates that the presented formulations could account for the basic statistics and thermodynamic aspects of impact-induced martensites.