Grain size effects on notch sensitivity |
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Affiliation: | 1. Structural Integrity Group, Universidad de Burgos, Escuela Politécnica Superior, Avda. Cantabria s/n, 09006 Burgos, Spain;2. AESA, Barreiro 2871, Ruta Provincial 52, Km 32,5, B1804EYA Canning, Ezeiza, Buenos Aires, Argentina;3. University of Cambridge, Department of Engineering, Trumpington Street, Cambridge CB2 1PZ, United Kingdom |
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Abstract: | This work presents experimental results on the fatigue behavior of cracks growing from circular notches under axial loading conditions for a very wide range of notch size to grain size ratios, including cases where the notch size is of the order of, or even smaller, than the grain size. Notch sensitivity is evaluated and the well-known dependence on grain size is clearly demonstrated. It was found that for the same specimen geometry and loading conditions, the influence of the stress concentration is directly dependent on the relationship between the notch size and the grain size. |
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Keywords: | Notch sensitivity Fatigue limit Notch size Grain size Microstructure |
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