Micro- and Macro-Approach to the Fatigue Crack Propagation in High-Strength Pearlitic Steel Wires
This paper analyzes how the cold drawing process influences the fatigue behaviour of eutectoid steel, with special emphasis on the role of microstructural changes induced during such a manufacturing process. Fatigue cracks are transcollonial and exhibit a preference for fracturing pearlitic lamellae, with non-uniform crack opening displacement values, micro-discontinuities, branchings, bifurcations and frequent local deflections that create microstructural roughness. The net fatigue surface increases with cold drawing due to the higher angle of crack deflections.
J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel
J. Toribio et al., "Micro- and Macro-Approach to the Fatigue Crack Propagation in High-Strength Pearlitic Steel Wires ", Key Engineering Materials, Vols. 348-349, pp. 681-684, 2007