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?degrees C to 350 degrees C with an incremental difference of 50 degrees 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 (Delta), 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 (Delta) of 3.97%, and a standard deviation of 5.67%.