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The failure mechanisms of thermal barrier coating (TBC) systems applied on gas turbine blades and vanes are investigated using thermomechanical fatigue (TMF) tests and finite element (FE) modeling. TMF tests were performed at two levels of applied mechanical strain, namely five times and three times the critical in-service mechanical strain of an industrial gas turbine. TMF testing under the higher...
The cyclic displacement instability exhibited by a thermally grown oxide (TGO) in a thermal barrier system has been simulated using a scheme that embodies large-scale thickening. The investigation has three main objectives. (i) A sensitivity study that probes the influence of the thermo-mechanical properties of the bond coat. It uses properties that closely resemble those relevant to actual bond coat...
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