Authors:
Oliver Schenk (1), Ali Rajaei (1), Christoph Broeckmann (1)
1- RWTH Aachen University, Institute for Materials Applications in Mechanical Engineering (IWM), Aachen, Germany
Abstract:
Powder compaction and sintering offer the efficient and sustainable production of net shape components. As the inherent porosity affects the strength and durability, secondary operations such as cold rolling or shot peening may be applied to reduce the porosity. A combination with subsequent case hardening contributes to a further increase of fatigue strength. Numerous experimental studies examined the effect of various parameters of such processes on the fatigue behaviour. However, a numerical approach that accounts for the interaction between individual processes has rarely been reported.
In this work, a computational approach is developed, which integrates the numerical modelling of surface densification, case hardening and loading condition to obtain information on the increase of fatigue strength of Astaloy 85Mo. The validity of the model is shown by comparison to available experimental findings on fatigue test bars. The potential of the approach is shown by its application to a sintered gear.
DOI:
https://doi.org/10.59499/EP246281733
