Project Details
Projekt
Determination of fatigue lives and origin of crack initiation of steel piston alloys in the VHCF regime at elevated temperatures (T02*)
Subject Area
Mechanical Properties of Metallic Materials and their Microstructural Origins
Term
from 2016 to 2019
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 169148856
Based on the knowledge gained in the subproject C04 during the first funding period of the CRC 920, the aim of the present proposal is to evaluate the fatigue properties of steel piston alloys in the application relevant temperature range between 200°C and 500°C up to 109 number of cycles. The investigations are focussed on the influence of materials production conditions (cast andwrought alloys), the chemical composition, the microstructure and defects like (pores, micro shrinkage cavities, non-metallic inclusions). Especially, investigations on the damage relevant defect size as well as damage accumulation are of great interest. The expected results can contribute to the clarification of occurring damage mechanisms in steel piston alloys at elevated temperatures and give finally a contribution to a modified design of piston geometries. Furthermore, results on the formation of damage relevant inclusion agglomerates can improve the entrapment capability of metal melt filters developed in the framework of the CRC 920 bymodification of the coating on the surface of filter struts.
DFG Programme
Collaborative Research Centres (Transfer Project)
Subproject of
SFB 920:
Multifunctional Filters for Metal Melt Filtration - a Contribution to Zero Defect Materials
Applicant Institution
Technische Universität Bergakademie Freiberg
Business and Industry
Federal-Mogul Nürnberg GmbH
