Influence of Temper Rolling on Tensile Property of Low Carbon Steel Sheets by Application of Hill 48 Anisotropic Yield Criterion

Abstract

Temper rolling is a fundamental process applied in steel industries to improve the tensile properties of sheet steels by eliminating discontinuous yield behaviours. Virtually evaluating the effects of temper rolling mechanics on eliminating discontinuity is still a crucial problem due to a lack of comprehensive constitutive material models that correctly describe this elimination mechanism. In this paper, modified anisotropic constitutive model based on Hill's 48 yield criterion are used for finite element analysis (FEA) of the temper rolling process. This model was applied for four different sheet thicknesses and the FEA results are compared with experimental results obtained directly from the production line. According to the results, the customized model that implements the modified anisotropic yielding criterion efficiently describes the tensile behaviour of low carbon steels following temper rolling, and it more accurately predicts the lower and upper yielding points than the isotropic yielding criterion. This model thus assists to facilitate the simulation, optimization and prediction of mechanical properties following temper rolling.