Fractographic and microstructural analysis of fatigue crack growth in a Ti-6A1-4V fan disc forging

The constant amplitude fatigue crack growth behaviour of a conventionally (alpha ß) solution treated and aged Ti-6A1-4V fan disc forging was examined by fractographlc and microstructural analysis. The crack growth process was complex with many Interrelated fracture features. A transition in the fatigue crack growth curve correlated with a change...