Versuchstechnische Untersuchung der Temperaturverteilung in einem Aluminiumkolben auf einem Prüfstand zur Bestimmung des Schädigungsverhaltens unter TMF-HCF Belastung

Pistons made of aluminium-silicon alloys are exposed to increasingly higher specific component loads in modern diesel engines due to increasing power yields and downsizing measures. These loads can be classified as superimposed TMF-HCF loads. Therefore, a precise understanding of the damage behaviour of aluminium pistons under TMF-HCF load is necessary for an operationally stable design. On a specially designed test rig, piston samples can be examined under combined thermal and mechanical load cycles. Some modifications were made to the test rig to make testing operations more efficient. The effectiveness of the modifications was then validated by a series of tests. As a consequence, the duration of the thermal load cycles could be significantly reduced. The resulting temperature distribution in the piston was measured and analysed. Based on these findings, lifetime simulations and fatigue tests can be carried out in the future to investigate aluminium-silicon test pistons under TMF-HCF load.