Performance Analysis of Functionally Graded Coatings in Contact with Cylindrical Rollers

Jahedi, Reza; Adibnazari, Saeed; Farrahi, G.H.

doi:10.1155/2014/456848

Cited by 8 publications

(6 citation statements)

References 33 publications

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“…Rather often, the initiation of the gradient coating destruction is caused by contact or localized loads. Therefore, in the last decade, the analysis of mechanical stresses in protective coatings caused by contact pressure has been the subject of research by many scientists [44][45][46][47][48]. These papers demonstrate the effects of factors such as coating stiffness, friction coefficient and contact geometry on the stress state of coatings and substrates.…”

Section: Introductionmentioning

confidence: 99%

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

Shatskyi,

Makoviichuk,

Ropyak

et al. 2023

Ceramics

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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.

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Section: Introductionmentioning

confidence: 99%

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

Shatskyi,

Makoviichuk,

Ropyak

et al. 2023

Ceramics

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“…The hierarchical structure from SS316L to Inconel 718 to copper based on SS304L substrate was achieved by a DED system 18 . Stress distribution predicted by Finite Element Method (FEM) will be instructive when making material selection and design 19 . DED can also be used for surface coating, part maintenance, and the repair of defects such as cavities, cracks, and delamination 20 – 22 .…”

Section: Introductionmentioning

confidence: 99%

Fretting wear behavior of Inconel 718 alloy manufactured by DED and treated by UNSM

Karimbaev

Wang

et al. 2023

Sci Rep

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Alloy 718 is commonly used in the maritime and aerospace industries due to its strength and durability, particularly in engine rotating components such as disks, fan blades, and high-pressure compressors. As a new type of 3D printing technology, directed energy deposition (DED) can employ lasers to melt metal powders or wires to fabricate arbitrary-shaped workpieces directly from customized data, thereby making machining more synergistic and intuitive. However, the surface properties of the DED-printed alloy 718 samples, such as surface roughness and wear resistance, are typically subpar. By introducing severe plastic deformation to the near-surface, ultrasonic nanocrystal surface modification (UNSM) can be used as a post-processing method and results in altered properties. The uniaxial tensile test reveals that the UNSM-treated alloy 718 exhibits a higher mechanical property. Moreover, using a fretting test rig in accordance with the cylinder-on-plane agreement, a higher wear resistance for UNSM-treated alloy 718 is observed. This study employs the finite element method to fully comprehend the effect of UNSM on wear performance. The fretting wear process of Inconel 718 alloy is established using an energy-based finite element model. Considering the severe practical scenarios, the Johnson–Cook constitutive model is implemented, with the linear isotropic hardening model capturing the plastic behavior. In comparison to experimental measurements, the finite element results demonstrate unprecedented wear loss consistency with an error of less than 2%. Therefore, we conclude that the finite element model built in this study exhibits a high accuracy and can be used to analyze the effect of UNSM on fretting wear behavior. According to finite element analysis, as the normal load increases, the improvement in wear resistance induced by UNSM decreases. Given that the finite element model is based on the energy method, the effects of coefficient of friction (COF) and wear coefficient modified by UNSM are investigated separately. According to the findings, the UNSM-modified COF and wear coefficient play a significant role in determining the wear characteristics. Due to the removal of a substantial amount of material from the central area of the alloy 718 surface by wear, it is also possible to observe that severe plastic strains are primarily concentrated at the edges of the wear scars.

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“…A recent study revealed that a coating film can improve elastic modulus of BCC lattice structure up to 68 percent [14]. The general stress analysis of coated lattice structures was already studied through analytical [15], numerical [16], [17], or experimental [18] approach. In analytical and numerical methods, lattice is treated as a special type of composites, whose equivalent properties are common to be mapped from local to global level.…”

Section: Introductionmentioning

confidence: 99%

Multiscale Evaluation of The Elastic Behavior for The Metal-Coated Lattice Structures

Soleimanian

Wang

Chen

et al. 2020

Preprint

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Well-developed Additive Manufacturing leads to a variety of material and structure design. With the combination of 3D printing and plating technique, metal-coated resin lattice is investigated to achieve a light weight design with minimal economic cost and admirable material properties. In this paper, numerical approaches integrated with classical homogenization theory is adopted to study the effective mechanical characterizations of the BCC (Body-Centered-Cubic) metal-coated lattices. The selection of RVE (Representative Volume Element) is discussed for obtaining objective effective properties. Moreover, the impact of unit cell rod diameter and coating film thickness are investigated. A sensitivity analysis of these two parameters is conducted based on the advanced hypercube sampling methods. The results reveal that multiple-unit-cells lead to more stable homogenized properties than single unit cell. The Increase of volume fraction may improve the elastic modulus and specific modulus remarkably. However, the increase of thickness of coating film only leads to monotonously increased elastic modulus. For this reason, there exists an optimal coating film thickness for the specific modulus of the lattice structure.

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Performance Analysis of Functionally Graded Coatings in Contact with Cylindrical Rollers

Cited by 8 publications

References 33 publications

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

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

Fretting wear behavior of Inconel 718 alloy manufactured by DED and treated by UNSM

Multiscale Evaluation of The Elastic Behavior for The Metal-Coated Lattice Structures

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