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Short/small fatigue crack growth, thresholds and environmental effects: a tale of two engineering paradigms

机译：Short/small fatigue crack growth, thresholds and environmental effects: a tale of two engineering paradigms

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This paper results from mutual discussions on the review `When do small fatigue cracks propagate and when are they arrested?' in Corrosion Reviews, 2019; 37(5): 397-418. These discussions have arisen from the two engineering paradigms characterizing our fatigue research: (i) an aerospace research and technology remit for metallic airframes, and (ii) a materials science research programme supporting a methodology for steam turbine low pressure (LP) blade operations. In our opinion, this paper is of interest for other investigators of metal fatigue with respect to design requirements, life predictions and assessments. In more detail, the paper considers the fatigue design methodologies for airframes and steam turbine LP blades. This includes short/small fatigue cracks, fatigue crack growth thresholds, high-cycle fatigue (HCF) and very-highcycle fatigue (VHCF), and the relevance of environmental effects (corrosion and corrosion fatigue).

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