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Abstract

Results from investigations of the fatigue crack growth behaviour and ∆K threshold levels in α-titanium, α-brass, and low-carbon ferritic steels are presented. The observations show that microstructure has a substantial influence on the mechanisms and modes of fatigue crack growth. The role played by transgranular and intergranular modes of failure in the intermediate and low ∆K regions are considered. The development of irregular fracture faces due to out-of-plane crack trajectories with the associated ‘non-closure‘ of the fatigue cracks is suggested as a substantial contributor to the factors determining ∆K threshold levels.

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References

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Micromechanisms of fatigue crack growth at low stress intensities

Abstract

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References