Abstract
In the present study, we first briefly reviewed the prominent measuring techniques on residual stress of Thermal Barrier Coatings (TBCs). Then, three-dimensional digital image correlation as a non-destructive full-field optical measurement method is used to measure the strip curvature on thermal spray coatings including a NiCrAlY bonding layer and an yttria-stabilized zirconia (YSZ) layer on 304 stainless steel substrate. The stress profile through thickness can be determined in each step of deposition by finite element method based on an inverse analysis and the stress interpretation of curvature, and the individual contribution of quenching and thermal stresses to residual stress are analyzed from temperature evolution during post-deposition cooling.
