M. Sc. Jonas Ziman
phone +49 631 3724-2461 e-mail: jonas.ziman@hs-kl.de building : H room: H 2.041.2
Scientific Assistant
Team leader "High frequency fatigue"
2025 - today Team leader "High frequency fatigue" at WWHK
2023 - today Scientific
Head of the Department of Materials Science and Materials Testing
Confidential Professor AING
DFG Confidential Professor
Member of the Committee for Studies and Teaching
Study Director BbB
Function at the University of Applied Sciences
MibaLeb is expected to make a decisive contribution to this. The overall goal of the second project phase is to transfer the results, findings and methods to real and actually loaded materials and components in order to provide reliable information on the integrity and remaining service life of nuclear power plants.The aim of the WWHK subproject
"MibaLeb II“ microstructure-based fatigue life calculation
The overall objective of the joint project is the development of a procedure for the remaining fatigue life assessment of metallic nuclear power plant components that have aged during operation. It is taken into account that the local material properties of components can change due to mec
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
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
Use of the electrochemical potential to characterize the surface damage behavior of cyclically loaded materials
As part of the research project, a corrosion measuring set-up is to be set up and integrated into a fatigue testing system (rotating bending machine and/or vibration testing system) so that electrochemical investigations can be carried o
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, damage developm
Evaluation of the frequency influence on the fatigue behaviour of unalloyed steels
Fatigue life prediction methods (LPV) developed at WWHK in recent years have so far been limited to the transition between LCF (Low Cycle Fatigue) and HCF (High Cycle Fatigue) and to the HCF regime. This has recently led to controversial discussions regarding the ut
