Prediction of the Strain hardening exponent of HP40-Nb alloy

Abstract

This paper investigate the reliability of the strain hardening exponent calculation methods in the case of HP40-Nb class material. The approach was to analyse which one of the mathematical models (Hollomon, Swift, and Ludwik) could be applied and which provides the most accurate results to obtain the strain hardening exponent of centrifugally cast steel alloy HP40-Nb. The modelling was performed using the values of stress and strain obtained in the experiment by uniaxial tension. It was found that using the Hollomon and Swift methods the best approximation of the strain hardening exponent with theoretical values could be obtained.