Fatigue Crack Growth Models Applied to Additive Manufactured Electron Beam Melted Ti6Al4V: A Review

This article comprehensively reviews the fatigue crack growth (FCG) models applied to Ti6Al4V alloy manufactured by electron beam melting (EBM) powder bed fusion (PBF). The current progress in FCG analytical and numerical models and their application to EBM Ti6Al4V are reviewed. Many experimental data for the creation of historic FCG models were based on conventionally manufactured (CM) aluminum alloys and various steels. With the growth of additive manufacturing (AM), recent literature has applied traditional models and modified new models to EBM Ti6Al4V and validated their use as accurate predictive models for the da/dN-ΔK curve and ΔKth.