Effect of a prestrain on the subsequent yielding of low carbon steel sheets: experiments and simulations

Abstract

A sequence of uniaxial tension experiments have been performed on low carbon steel sheets along different axes and have measured the evolution of the subsequent yield stress after several moderate prestrain levels and for various angles between the two tensile axes. Simulations have been conducted in order to evaluate the respective influence of the development of deformation textures and of intragranular microstructures. The results of simulations have shown the major influence of microstructural effects and the importance of the initial texture rather than its evolution. In agreement with experiments, one finds an amplitude of 20 percent and a maximum effect around 45 degrees for the relative variation of yield stress with the angles between the two tensile axes at a prestrain of 0.15.