Print Email Facebook Twitter The effect of cold deformation and ageing on fatigue crack propagation and residual strength of 2024 sheet material Title The effect of cold deformation and ageing on fatigue crack propagation and residual strength of 2024 sheet material Author Broek, D. Bowles, C.Q. Institution National Aerospace Laboratory NLR Date 1969-05-31 Abstract A 1 to 3% strain after quenching introduces many dislocations which act as nucleation sites for precipitates. The result is a smaller precipitate which gives better fatigue and fracture properties. Larger strains introduce too much work hardening and the properties decrease again due to the low ductility. The dimple size in the electron fractographs covild be correlated with the spacing of the inclusions in transmission electron micrographs. To reference this document use: http://resolver.tudelft.nl/uuid:237f0d5f-8408-4e1e-a8c2-a06ba70f3eda Publisher Nationaal Lucht- en Ruimtevaartlaboratorium Access restriction Campus only Source NLR-TR 69048 U Part of collection Aerospace Engineering Reports Document type report Rights (c) 1969 National Aerospace Laboratory NLR Files PDF NLR_TR_69048_U.pdf 21.5 MB Close viewer /islandora/object/uuid:237f0d5f-8408-4e1e-a8c2-a06ba70f3eda/datastream/OBJ/view