On the effect of microstructural heterogeneity on yield point phenomena in architectured steel: Revealed by in-situ micro-digital image correlation (μDIC)

Lüders banding in carbon steel is a manifestation of discontinuous yielding and limits the formability and surface quality of the steel. In this study, we explore the role of microstructure heterogeneity in suppressing the formation of Luder band. A ferritic steel was processed by decarburization, cold rolling, and controlled annealing to induce partial recrystallization and develop a heterogeneous grain structure. This micro-architectured …