On the interpretation of the fractal character of fracture surfaces

摘要: Abstract To examine the usefulness of fractal concept in quantitative fractography, a series classical fracture surfaces, namely transgranular cleavage, intergranular fracture, microvoid coalescence, quasicleavage and are analyzed terms geometry. Specifically, five brittle ductile modes studied, from three well characterized steels (a mild steel, low-alloy steel 32 wt% Mn-steel) where salient microstructural dimensions contributing to final morphology have been measured. Resulting plots mean angular deviation, Richardson (fractal) lineal roughness, as function measuring step size, interpreted with aid computer-simulated fracture-surface profiles known characteristics. It is found that ranges resolution, over which dimension constant, correspond pertinent metallurgical on surface, thus can be related size-scales.