Thermomechanical Fatigue Crack Growth Modeling in a Ni-Based Superalloy Subjected to Sustained Load
2016 (English)In: Journal of engineering for gas turbines and power, ISSN 0742-4795, E-ISSN 1528-8919, Vol. 138, no 1, 012503-012503 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
ASME Press, 2016. Vol. 138, no 1, 012503-012503 p.
Mechanical Engineering Materials Engineering Applied Mechanics
IdentifiersURN: urn:nbn:se:liu:diva-121008DOI: 10.1115/1.4031158ISI: 000371127900014OAI: oai:DiVA.org:liu-121008DiVA: diva2:850765
Funding agencies: Swedish Energy Agency; Siemens Industrial Turbomachinery AB; GKN Aerospace Engine Systems; Royal Institute of Technology through Swedish research programme TURBO POWER2015-09-022015-09-022016-03-21Bibliographically approved