Following this characterization, the damaged volume is removed from the specimen, which is polished and then subjected to secondary loading on various test systems at test frequencies of 5, 60, 200 and 1000 Hz. In the HCF range, a direct comparison with the original undamaged specimens can thus be derived. In the VHCF range, possible deviations i
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Two factors in particular must be considered here. Relevant damage mechanisms can change from the HCF to the VHCF regime. For example, the crack initiation points shift into the volume in the field of defects, such as inclusions and precipitates, especially in the case of high-strength conditions. In the case of ductile materials, damag
Characterisation of materials and structures by means of scanning electron microscopy and EDX, EBSD and STEM analysis
Within the scope of a large-scale equipment application funded by the German Research Foundation (DFG), a high-resolution Clara scanning electron microscope from Tescan was purchased, featuring energy dispersive X-ray spectroscopy
Quantified evaluation of the frequency influence on the fatigue behavior of unalloyed steels for implementing in resource-efficient fatigue life prediction methods
As a part of the program of the research project, the established fatigue life prediction methods for the HCF regime at frequencies of 5 Hz will be expanded for higher frequencies (up t
Dr.-Ing. Christoph Bleicher E-Mail Division Manager Structural Durability, Fraunhofer LBF Darmstadt Fraunhofer Institute for Structural Durability and System Reliability
Lecturer in Structural Durability
Availability of data
Within the scope of research projects, the raw data commonly used in materials testing are generated in the form of predominantly open formats (e.g. ASCII, csv or TIF). During data collection, not only experimental findings and data derived from them are taken into account, but also the methods used. All research data are comp
