Effect of Thermal Barrier Coating Layer on HIP Treated IN738LC Fatigue Characteristic
The fatigue characteristic of thermal barrier-coated Ni-base superalloy IN738LC at room temperature was studied by fatigue test using SEM-servo testing machine. In order to eliminate the influence of micro-shrinkage in IN738LC and purely investigate the effect of TBC on fatigue characteristic, HIP treated IN738LC was used in comparison with NON-HIP treated one. The results indicate that HIP treatment is effective to remove micro-shrinkage and fatigue life is greatly improved. The TBC coating layer is a strength member in the small test specimen at room temperature, and TBC coated material showed lower fatigue life rather than IN738LC without TBC.
Ichsan Setya Putra and Djoko Suharto
S. Kuba et al., "Effect of Thermal Barrier Coating Layer on HIP Treated IN738LC Fatigue Characteristic", Key Engineering Materials, Vols. 306-308, pp. 109-114, 2006