Thermomechanical Fatigue Crack Growth Modeling in a Ni-Based Superalloy Subjected to Sustained Load

Autor: Johan Moverare, Erik Storgärds, Kjell Simonsson, Sören Sjöström
Rok vydání: 2015
Předmět:
Zdroj: Journal of Engineering for Gas Turbines and Power. 138
ISSN: 1528-8919
0742-4795
DOI: 10.1115/1.4031158
Popis: Thermomechanical fatigue (TMF) crack growth modeling has been conducted on Inconel 718 with dwell time at maximum load. A history dependent damage model taking dwell damage into account, developed under isothermal conditions, has been extended for TMF conditions. Parameter determination for the model is carried out on isothermal load controlled tests at 550–650 °C for surface cracks, which later have been used to extrapolate parameters used for TMF crack growth. Further, validation of the developed model is conducted on a notched specimen subjected to strain control at 50–550 °C. Satisfying results are gained within reasonable scatter level compared for test and simulated number of cycles to failure.
Databáze: OpenAIRE