Tissue engineering of cells in complex hydrogels using three-dimensional electrical and magnetic stimulation
The project is located in the field of tissue engineering. Tissue engineering refers to the production of tissue replacements in the laboratory. The aim is the production of intestinal wall analogue tissue from muscle and nerve cel
For this purpose, measurements on fatigue specimens are carried out on the steel 20MnMoNi5-5 in a service relevant heat treatment condition, in which the residual stresses are determined conventionally using an X-ray diffractometer and then the results are used in order to calibrate the µmagnetic measuring system.The surface roughness is measured
As part of the planned research project, fatigue specimens of the steels C22R and 20MnCrS5 will be subjected to conastant amplitude loading with different stress and total strain amplitudes. Within the framework of conventional fatigue tests, it is first of all not possible to make reliable statements with regard to macrocrack formation and propa
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Micro- and nanostructured hard magnetic materials and components for microtechnical applications "MiNaMag"
Permanent magnets are used in a variety of ways and increasingly in technical products, above all for data storage, in energy technology, in sensor technology, and for transport and separation processes. This large market is
For the first experiments in distilled water, a miniaturized electrochemical in-situ cell with a standard three-electrode system, which is also used in potentiodynamic polarization measurements, is being developed. The challenge here is that the cell must be sealed at the sample shafts so that cyclic loading of the specimen can occur in the cell
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 the research project funded by the DFG, a high-resolution scanning electron microscope with EDX, EBSD and STEM detectors as well as an external FIB will be procured and scientific staff will be provided to opera
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
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