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2022 (Engelska)Ingår i: International Journal of Fatigue, ISSN 0142-1123, E-ISSN 1879-3452, Vol. 163, artikel-id 107077Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
In fatigue life prediction of single crystal gas turbine blades, the risk of rapid crystallographic crack growth along the close-packed planes poses a large uncertainty. A criterion is proposed to predict the transition from mode I to crystallographic crack growth, which is necessary for reliable prediction of the number of cycles from crack initiation to the onset of crystallographic crack growth. The proposed criterion is calibrated against tests performed under a wide range of conditions representative for a gas turbine blade, including isothermal fatigue crack growth tests and thermomechanical fatigue crack growth tests, some including hold times and pre-test aging.
Ort, förlag, år, upplaga, sidor
Elsevier, 2022
Nyckelord
Single crystal superalloy, TMF, Crack growth, Crystallographic crack growth, Aging, Hold time
Nationell ämneskategori
Annan materialteknik
Identifikatorer
urn:nbn:se:liu:diva-186053 (URN)10.1016/j.ijfatigue.2022.107077 (DOI)000818487800002 ()
Anmärkning
Funding agencies: The work has been supported financially by Siemens Energy AB in Finspång, Sweden and the Swedish Energy Agency, via the Research Consortium of Materials Technology for Thermal Energy Processes, Grant No. KME-702.
2022-06-172022-06-172023-12-28Bibliografiskt granskad