Experimental and numerical residual stress analysis of layer coated composites

Evaluation of Residual Stresses and Their Influence on Cavitation Erosion Resistance of High Kinetic HVOF and HVAF-Sprayed WC-CoCr Coatings

“…Accuracy of the hole drilling method as well as layer removal method is dependent on which calibration coefficients are used; these calibration coefficients of the inhomogeneous coatings do not often exist. The accuracy of hole drilling method for thermally sprayed coatings has been further improved by utilizing finite element analysis to determine the required calibration coefficients (Ref [22][23][24][25][26][27] In situ curvature method, by which the coating substrate curvature is measured during spraying, is the only method, which can track the origin of the all residual stresses; quenching or peening, and thermal mismatch ( Ref 22). The main limitation of the curvature method is, that the curvature data is not simple to transform into coating stresses.…”

Simulation of thermal stress in magnetron sputtered thin coating by finite element analysis

“…Residual stress can strongly influence coating quality and performance of a coated system since it is directly related to other coating properties such as hardness, adhesion, fatigue strength, etc. [1]. They can give rise to deformation of coated workpieces by several stress relaxing mechanisms such as adhesive failure (delamination at the interface) or cohesive failure (spalling or micro-cracking within the coating) of the coating or subsurface fracture (substrate failure) [2,3].…”

Destructive techniques in the measurement of residual stresses in composite materials: an overview

“…Thus the hole-drilling method, and variations of it, cannot be directly used or adapted for use in fi nding the micro-scale residual stresses in uni-directional GFRP (Reid, 2009). Buchmann et al . (2000) describe a novel approach to simulating the thermal spraying process by modeling a moving heat source combined with the material transfer and deposition process.…”