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Materials 2017, 10(4), 439; doi:10.3390/ma10040439

Corrosion-Fatigue Crack Growth in Plates: A Model Based on the Paris Law

Fracture & Structural Integrity Research Group (FSIRG), University of Salamanca (USAL), E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain
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Academic Editor: Alex A. Volinsky
Received: 1 February 2017 / Revised: 18 April 2017 / Accepted: 18 April 2017 / Published: 22 April 2017
(This article belongs to the Special Issue Stress Corrosion Cracking in Materials)
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Abstract

In this paper, a Paris law-based model is presented whereby crack propagation occurs under cyclic loading in air (fatigue) and in an aggressive environment (corrosion-fatigue) for the case of corner cracks (with a wide range of aspect ratios in the matter of the initial cracks) in finite-thickness plates of 316L austenitic stainless steel subjected to tension, bending, or combined (tension + bending) loading. Results show that the cracks tend during their growth towards a preferential propagation path, exhibiting aspect ratios slightly lower than unity only for the case of very shallow cracks, and diminishing as the crack grows (increasing the relative crack depth)—more intensely in the case of bending than in the case of tension (the mixed loading tension/bending representing an intermediate case). In addition, the crack aspect ratios during fatigue propagation evolution are lower in fatigue (in air) than in corrosion-fatigue (in aggressive environment). View Full-Text
Keywords: 316L stainless steel; finite-thickness cracked plate; corner crack; numerical modeling; corrosion-fatigue; fatigue crack propagation; preferential propagation path 316L stainless steel; finite-thickness cracked plate; corner crack; numerical modeling; corrosion-fatigue; fatigue crack propagation; preferential propagation path
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Toribio, J.; Matos, J.-C.; González, B. Corrosion-Fatigue Crack Growth in Plates: A Model Based on the Paris Law. Materials 2017, 10, 439.

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