The High Temperature Fatigue Behavior of Inconel-738LC Material Deposited Thermal Barrier Coating
This work investigated the thermal fatigue behavior of Inconel-738LC material deposited thermal barrier coating by Vacuum Plasma Spray(VPS). The Inconel-738LC material which is widely used as a turbine parts is a CoNi-based superalloy with CoNiCrAlY bond coating and ZrO2-8wt%Y2O3 ceramic top coating. The microstructure of coating layer was analyzed by SEM/EDS and XRD. Thermal fatigue tests were performed using compact tension specimens at 550°C, 750°C, 950°C with the load frequency of 10Hz. The fatigue crack growth behavior was characterized depending on number of cycles. The crack growth rate was found to be greater at lower frequency and higher temperature.
M.S.J. Hashmi, S. Mridha and S. Naher
J. H. Park et al., "The High Temperature Fatigue Behavior of Inconel-738LC Material Deposited Thermal Barrier Coating", Advanced Materials Research, Vols. 264-265, pp. 1409-1414, 2011