Quantitative Analysis of Fractography for Fatigue Fracture Surface

Abstract

Fatigue crack growth tests were carried out for ferrous metals, Al and Ti alloys. Fracture surface morphology was evaluated quantitatively in order to correlate fractography with crack growth rate. Selected locations of fracture surface were observed by SEM. The 3-dimensional configurations of fracture surface were reconstructed by computer software. Normalized surface area and fractal dimension were calculated from the height information of the reconstructed fracture surface.