Cowper-Symonds Strain Hardening Model For Flow Behaviour Of Inconel 718 Alloy

Abstract Understanding material properties and deformation behavior are key prerequisite to optimize process parameters for improving working conditions suitable for material processing and ensuring safe performance during hot working. The main objective of this study is to relate the static and dynamic flow behavior of Inconel 718 alloy with strain hardening and strain rate by a well-known constitutive model, Cowper-Symonds (CS) equation. A comparative study has been made on modified Cowper-Symonds (m-CS) strain hardening model to study the effect of strain, strain rate dependency and temperature on material behaviour. For this, m-CS is developed with various material constant for Inconel alloy and compared. By comparing the average absolute error, correlation coefficient and its standard deviation, the suitability of m-CS model was evaluated. The proposed m-CS model could predict the flow behaviour at high strain rates and elevated temperatures of Inconel alloy validated better agreement with experimental data.