Authors:
Oliver Schenk (RWTH Aachen University, Institute for Materials Applications in Mechanical Engineering, Germany)
Gerrit Hellenbrand (RWTH Aachen University, Laboratory for Machine Tools and Production Engineering (WZL), Germany)
Dieter Mevissen (RWTH Aachen University, Laboratory for Machine Tools and Production Engineering (WZL), Germany)
Christian Brecher (RWTH Aachen University, Laboratory for Machine Tools and Production Engineering (WZL), Germany)
Christoph Broeckmann (RWTH Aachen University, Institute for Materials Applications in Mechanical Engineering, Germany)
Abstract:
Structural components produced by press and sinter technology are subject to limitations in strength due to the inherent porosity. Hence, the improvement of material properties by heat treatments or surface densification is a crucial step to open up new markets and maintain competitiveness with conventional production routes. While the effect of heat treatments is well reported for densities of up to 7.2 g|cm³, no information is available on the fatigue strength of the pore-free material. Therefore, this work aims to analyse the fatigue properties of molybdenum alloyed sintered steel at different carbon contents, microstructures and densities. This investigation is partly based on the testing of round samples, which are compressed to full density by an additional HIP process. Subsequently, a regression model is derived that approximates the fatigue strength based on the density, hardness and microstructure, which can then be incorporated in a numerical assessment of the load bearing capacity.
DOI:
https://doi.org/10.59499/EP256768030
