Analytical Model of Deformation of a Functionally Graded Ceramic Coating under Local Load

Abstract

In this article, an analytical approach to the study of the behavior of functionally graded FG coatings under local load is developed. The method is suitable for coatings with a specific structure. We consider that the coating can be conditionally divided into two zones: a relatively rigid outer and a relatively compliant inner. The outer layer is modeled by a non-homogeneous plate that bends. We submit the inner substrate to the hypothesis of a non-homogeneous thin Winkler layer. The solution of the formulated boundary value problem is constructed in analytical form. Simulation examples for FG aluminum oxide coatings grown from aluminum sprayed on steel and from compact alloy D16T are considered. The distributions of equivalent stresses, safety factors and normalized equivalent stresses in the coatings are studied. It is noted that in a heterogeneous material, the location of the minimum of the safety factor does not always coincide with the location of the maximum of the equivalent stress.

Prediction of phase composition and mechanical properties Fe–Cr–C–B–Ti–Cu hardfacing alloys: Modeling and experimental Validations

“…Analytical methods for solving singular problems about the stress state of coatings under local load in relation to the problems of indentation and interaction with abrasive particles are proposed in papers [ [185] , [186] , [187] ]. Later, these approaches were developed to model the behavior of layered [ 188 , 189 ] and functionally gradient [ 190 ] coatings.…”

The Tribological Properties of Plasma Electrolytic Oxidation Layers Synthesized on Arc Spray Coatings on Aluminum Alloys in Contact with Various Friction Materials

“…Its use makes it possible to obtain multifunctional layers (similar to ceramics) with a unique set of properties. PEO layers have high wear resistance, corrosion resistance and heat resistance, as well as electrical insulating and decorative properties [29][30][31][32][33][34]. Depending on the chemical composition of the aluminum alloys, PEO layers with different contents of α, γ, δ and η phases are formed on their surface.…”

Evaluation of the Degree of Degradation of Brake Pad Friction Surfaces Using Image Processing

“…[57][58][59][60][61]. Plasma electrolytic oxidation is promising for the formation of composite oxide coatings on the working surfaces of brake discs made of aluminum and titanium alloys [62][63][64][65][66][67].…”