Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5015183 | International Journal of Fatigue | 2017 | 33 Pages |
Abstract
The damage mechanisms under different TMF conditions are presented and the impact of a through thickness thermal gradient (induced by means of internal cooling) is analyzed. Moreover, a prior thermal over-aging of the whole system is investigated to mimic service degradation. It is shown in this work that depending on the tensile stress applied at low temperature, a change in the main degradation mechanism of the TBC system is observed. Moreover, the thermal over-aging before TMF tests favors cycling ratcheting in compression during thermo-mechanical cycling due to the degradation of the substrate microstructure.
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Authors
Florent Mauget, Florence Hamon, Médéric Morisset, Jonathan Cormier, Fanny Riallant, José Mendez,