Mechanisms and modelling of fatigue crack growth under combined low and high cycle fatigue loading

Abstract:The evolution of microcracks in a 10%-chromium steel is followed with the replica technique for pure low cycle fatigue (LCF) and combined LCF and high cycle fatigue (HCF) loading conditions. The superimposed HCF-cycles lead to accelerated fatigue crack growth rates, as soon as a certain crack length is reached. A mechanism based model is presented, which accounts for this eect and only needs one single tting parameter. The model is used to predict fatigue lives at high temperatures and under thermomechanical fatigue loading conditions.

date: 15.12.2009
place: UHW 11/1102
time: 11 am

For more information contact: Rebecca.Janisch@rub.de