Integrated Johnson–Cook and Zerilli–Armstrong constitutive model for flow-stress prediction of AZ31B alloy

An appropriate constitutive model is essential for trustworthy numerical simulations and the analysis of material deformation behaviour during the metal-forming process. In the present work, the quasi-static warm tensile response of AZ31B alloy ranging from 200°C to 350°C with an incremental difference of 50°C and the strain rates from 10−1 to 10−3 s−1 is investigated experimentally and predicted using the Johnson–Cook and Zerilli–Armstrong (JC-ZA) constitutive model. The temperature and strain rate variation has a substantial impact on flow-stress behaviour. The model prediction efficacy is analysed based on the correlation coefficient (R), average absolute error (Δ), and their standard deviation (s). It is evident that the integrated JC–ZA model has better accuracy, with a correlation coefficient of 94.5%, average absolute error (Δ) of 3.97%, and a standard deviation of 5.67%.