Cleavage Stress Producing Notch-Induced Anisotropic Fracture and Crack Path Deflection in Cold Drawn Pearlitic Steel

The fracture performance of axisymmetric notched samples taken from pearlitic steels with different levels cold-drawing is studied. To this end, a real manufacture chain was stopped in the course process (on-site factory), and all intermediate stages were extracted initial hot-rolled bar (not cold-drawn at all) to final commercial product (prestressing steel wire). Thus, drawing intensity or straining level (represented by yield strength) treated as key variable elucidate consequences manufacturing on posterior issues. On basis materials science approach, clearly anisotropic behavior heavily drawn (exhibiting deflection surface) rationalized markedly oriented microstructure that influences operative micromechanism fracture. In addition, finite element analysis stress distribution instant allows computation cleavage annular required produce thus crack path associated mixed-mode cracking. Results show such governing initiation propagation (a specially enlarged fracture) appearing along wire axis direction case sharply-notched steels.