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2021
Conference Paper
Titel
Linking information from non-destructive testing and casting process simulation of components made of nodular cast iron with the cyclic, strain-based material behavior influenced by dross
Abstract
The fatigue life assessment of large cast components, e.g. for wind energy application, requires knowledge of material strength as well as the inclusion of information from casting process simulation and nondestructive testing. These methods provide the opportunity to estimate, for instance, the position and characteristics of dross in nodular cast iron (GJS). Specimens with and without dross are analyzed based on straincontrolled fatigue tests and correlated with the results of computer tomography images in order to gain the necessary knowledge about the influence of dross on fatigue strength. Metallographic and fractographic investigations are carried out on fatigue specimens and compared with the results of the fatigue tests. Additionally, virtual limiting samples can be used to assign a value for fatigue-acceptable imperfections to each component area. Moreover, data from casting process simulation, simulation of local stress and the requirement for fatigue life can be correlated with this concept.