Print Email Facebook Twitter An investigation into the effect of oxygen and watervapour on the propagation of fatigue cracks in 2024-T3 alclad sheet Title An investigation into the effect of oxygen and watervapour on the propagation of fatigue cracks in 2024-T3 alclad sheet Author Hartman, A. Jacobs, F.A. Institution National Aerospace Laboratory NLR Date 1964-01-31 Abstract The propagation has been studied of fatigue cracks in 2024-T3 alclad sheet under fluctuating tension in different atmospheres. Of the principal constituents of air water vapour had a much more severe effect than oxygen; in wet -pure argon the endurance was much shorter than in dry pure oxygen. In air, other circumstances remaining unaltered, the endurance increased continuously at a reduction of the water vapour content; the endurance, at a water content of the air of 20 ppm being about 6 times as long as in air saturated with water. Between the limits of 30°/° and 100 /o relative humidity, as occurring in normal air, the endurance was only slightly affected. The thermodynamics and the mechanisms of the reactions of oxygen and water vapouir with the metal are discussed. To reference this document use: http://resolver.tudelft.nl/uuid:393f9af3-9b2e-4764-b1f0-a325a4f72fe7 Publisher Nationaal Lucht- en Ruimtevaartlaboratorium Access restriction Campus only Source NLR-TN M.2123 Part of collection Aerospace Engineering Reports Document type report Rights (c)1964 National Aerospace Laboratory NLR Files PDF NLR-TN_M.2123.pdf 81.5 MB Close viewer /islandora/object/uuid:393f9af3-9b2e-4764-b1f0-a325a4f72fe7/datastream/OBJ/view