Initiation and propagation of small fatigue crack in beta titanium alloy observed through synchrotron radiation multiscale computed tomography

Gaoge Xue,Takashi Nakamura,Nao Fujimura,Kosuke Takahashi,Hiroyuki Oguma,Akihisa Takeuchi,Masayuki Uesugi,Kentaro Uesugi

Engineering Fracture Mechanics（2022）

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摘要

•Multiscale SR-CT was used to analyze the small-crack initiation and propagation.•Crack shapes in low-ΔK regime are dissimilar but hardly influence da/dN–ΔK curve.•The local microstructure and its interaction with cracks were captured by nano-CT.•The crack initiated inside the beta grain, which lacks alpha-phase precipitation.

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关键词

Non-destructive inspection,Crack initiation,Small-crack growth,Beta titanium,Nanotomography

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